Adding a second battery — Tesla finally makes it possible

When Lightning Energy installed our Powerwall 2 back in December 2023 https://www.facebook.com/share/p/1Anc2vKKqZ/ it was great. Paired with our 13 kW Enphase/Jinko solar system and 10 kW inverter, it's been handling our fully electrified home in Emerald pretty well — five reverse-cycle ACs, heat pump hot water, EV charging, and grid outages lasting up to nine days. But as we've added more loads, I've been thinking about expanding battery storage. There was a problem, though. The Powerwall 2 is no longer CEC-approved for new installations in Australia. Tesla stopped taking orders for it in late 2024/early 2025, and as of January 2026 it's no longer on the Clean Energy Council approved list. So you can't add a second one. And until very recently, the Powerwall 3 — Tesla's current model — was completely incompatible with the Powerwall 2. They couldn't talk to each other. That meant anyone with a Powerwall 2 who wanted more storage faced a painful choice: rip out the existing battery and…

Heat pump testing — how fast does it heat?

In my December post about our heat pump installation, I mentioned that one of the reasons I chose Emerald was the integrated app. It shows the tank capacity, water temperature, outdoor temperature, and lets me turn it on and off or activate Boost Mode remotely. I've since used it to answer a question: how long does it actually take to heat the water, and does outdoor temperature make a difference? Over the past couple of months, I've been taking semi-random screenshots of the Emerald app at intervals through the day, tracking the water temperature as it heats from "Low" (around 25–30°C) up to the 60°C target. I did this on 11 different days, with outdoor temperatures ranging from about 14°C to 32°C. I then used AI (Claude, by Anthropic) to read all 87 screenshots, extract the data, and plot it on a chart. The chart shows each day's heating curve overlaid, with the lines colour-coded by outdoor temperature — red for hot days, blue for cool days. We might expect to see the warmer days…

Ducted air conditioning (or heating) is inefficient.

Let me explain, and see what you think. I am not a fan (pun intended) of ducted. It seems to be very inefficient. But only one in five air con sales reps seem to agree with my reasoning. At our previous home, in Saratoga NSW, we had a large (10kW) ducted air con system upstairs, which included all the bedrooms. When we just wanted to cool or heat one room, we tried to close the door of that room. But the door would slam shut and whistle, as the air would try to escape. The ducted air con had one or two outlets in each room’s roof. It had one shared return vent in the hall. Turning on the air con in a single room, the air needed to return to the hall to circulate. Closing the door blocked that path and made the pump work extra hard. The thermostat was also in the hall, as part of the control unit. We could set the target temperature of a room to say 22°C, but the room might cool down to 18° before the hall thermostat would register 22°, with a temperature gradient between the two. The…

High tech “sandal” to prevent the tailgate from hitting the wall.

I typically reverse into car parks. But that often leaves not enough space to open the tailgate. I wasn’t sure whether it would clear the wall, so I wedged my sandal there, just in case. Lucky I did. I hadn’t planned to open it, but we had some leftovers from dinner out with friends, which I wanted to put in the fridge in our subtrunk before we went to the movies. It would be handy if the Tesla could accurately gauge if there’s room to open the hatch, or open it just short of hitting anything. Until then, I just have to use a shoe, or just move the car out and back in.

Goodbye gas! I finally organised disconnecting the ducted gas heating at our home.

If only we could see the burnt gas pouring into the air, all the time, and not just when the condensation highlights it (as in the photos). Pumping carcinogens and greenhouse gases into the air that we breathe. It’s nuts. It was costing us up to $528 per month to run the heating in winter. Our replacement air conditioning will be closer to free, thanks to our solar and battery. We recently also replaced our gas hot water with a heat pump. See my post about that, here: https://www.facebook.com/share/p/17xtnGjv2E/ Our one remaining gas appliance is our stove top. Once that’s gone, we will save $35 per month just for the connection fee. And no more gas! We’re replacing the gas heating with some split air conditioners. Read about our replacement system here: https://www.facebook.com/share/p/18cxsd3qG7/ Follow Tesla Tripping to stay tuned. For those who might say “what about in a blackout”? Note the power point connection on the old gas heating. Our old gas hot water heat pump had one too.…

Multi-head air conditioning installation, stage 1.

tion, stage 1. The original plan was to install a multi head system, with five heads (one in each of five rooms), and one shared compressor, outside. Due to a change of plans (see “Problems” below), we end up with three heads on our multi-head system, covering our downstairs living area (lounge, dining, kitchen), master bedroom, and guest room. Configuration: Shared compressor: 18kW (though much lower in actual use) Head 1: Master bedroom: 2.8kW Head 2: Guest room: 2.8kW Head 3: Living area: 8.4kW Cost: The original quote was for a five head system, including two more 2.8kW heads and a slightly larger 20kW compressor. $14,776 Emerald 20kW with 5 x heads -$7,140 VEECS discount -$386 EOY Sale $7,250 Total inc GST Inclusions: Removal of Gas ducted system 1 (no duct removal) Double storey We paid about 20% deposit up front, and the rest on completion. As you can see above, the VEECS rebate/discount paid for about half of the system. As part of the project, we replaced the existing gas…

Finally unpacked the Teraglide shelf from the back of the Tesla.

Only took about ten minutes. But I’m keeping the fridge in the subtrunk. Links:

I’ve come across a few ICE (internal combustion engine) vehicles that could benefit from…

…charging points. Bear with me here. This ambulance, parked outside a nursing home, was running the engine, with no-one in it, I presume to keep the air con running, on what was a pretty hot day. Perhaps they were keeping the vehicle cool for a patient they were collecting. Fair enough. But, of course this leaks fumes (and noise) into the car park and reception, which isn’t great for health. I noticed that it has a power socket at the rear of the vehicle. I’m wondering if they could plug that into an electrical supply, if there was one at the parking spot (but wasn’t one handy here). This rental van I’m guessing has refrigeration, parked outside a butchers in Emerald. They made use of the external power socket, creatively plugging in from the shop. No noise or fumes. I wonder if it would be handy to have more accessible power points for these ICE vehicles? Or better yet, have electric vans that can keep cool without an engine, and recharge from a power point. One day soon, maybe.

First service call for our Tesla Model Y. Replacing our loaner wheel with a new wheel.

As you can see in our posts from a few weeks ago, we hit a pothole, damaging our left rear wheel. At the time, we only knew that we had a slow leak. We logged the problem in the Tesla app. They arranged for roadside assistance to come to us, in about an hour, to install a loaner wheel, and take ours away to diagnose. Today, Tesla replaced the loan wheel with a new wheel, costing a whopping $1319. I asked them to clean the damaged wheel and put it in the back of the car. In the photos, you can see the buckle and crack. I am wondering if it is fixable. When I booked this service in the app, I also asked them to fix the water in the light bar, and some issues with the steering wheel buttons. They replaced both. I’ll discuss the steering wheel buttons in a separate post. All covered under warranty. I had a bit of trouble figuring out where to leave the car. Several after me also mistakenly parked in front of the waiting lounge, next to a sign that probably shouldn’t be there. One of the…

Surprise picnic. Making use of all the hidey-holes in the Tesla.

Let’s pull over here next to the Yarra River. Would you like a cold drink? I just happen have a powered fridge in the sub trunk of the car. We can sit on the camp chairs from the frunk (front trunk, since there’s no engine). How about a cheese platter and some cherries to go with it? Ok “platter” is a bit of an overstatement, but work with me here. The car also has kitchen utensils and a dining table. We might as well just stay here for lunch now. Charging: All charged up for free from solar at home. There are also destination chargers down the road at the caravan park. Links:

Harkening back to my motorcycle days, enjoying the endless curves along the Bonang Road…

…from Tubbut to Orbost, Victoria, leaving the Snowy Mountains. The Tesla handled the drive beautifully. FSD off, for some driving fun. I had to watch out for quite a few sharp dips, barely marked with crayon width paint on the road. This road has stopping spaces specifically for motorcycles (pictured). Yesterday, I grabbed some groceries in Bombala and noticed the "Welcomes Motorcyclists" sign. Before we bought our first EV in 2022, we did a lot of motorcycle road trips. As you can see from the photos from a decade ago, we haven't aged at all! 😉. I'd love to see some "Welcomes EVs" signs in regional places. My stay last night in Tubbut was thanks, in part, to the simple EV changer provided by Gippsland Climate Change Network. They are on to something! Charging: I'm planning to stop for a break and grab lunch in Orbost. I'll charge at the fast charger while the car is parked anyway.

Heading south, out of the Snowy Mountains, from my overnight camp near Tubbut, towards…

…Orbost. Beautiful mist topped mountains, after last night’s rain. After about 20km of dirt road, I spotted tar, and another sign warning that there’s no petrol around here. Charging: I charged earlier this morning in Tubbut, while having breakfast and a shower. Great facilities for such a remote location. It’s only a slow charger, which topped me up 40% battery. I generally only charge while parked anyway, rather than waiting around. The navigation says I’ll get to Orbost with 11% charge, which is fine. There’s a fast charger there for me to use while I have lunch. Disappointingly, the Tesla’s Trip Planner doesn’t recognise the Chargefox charger in Orbost as a charging destination, so doesn’t realise that will give me enough to get home. It tried to reroute me the long way around, south east through Cann River, where there is a Tesla Supercharger. I have played this game before, so I just turned off “Trip Planner” to force it to take me directly through Orbost.

Car camping in my Tesla, beside a creek, off the beaten track in the Snowy Mountains.

It took me a while to find the site. Earlier, in my search, I pulled off onto two tracks that ended up in someone’s property. At least it gave some local kids an excuse to run outside to see what the UFO sound was I did a three point just outside their gate. I waved and grinned. A cup of tea and a snack from my Teraglide drawer, sitting in my camp chair, watching the bush life. Until the bush life started eating me (just a few bugs), signaling time for bed. I again wished I had remembered to pack a collapsible stool, to help climb into the back of the car. Followed by the commando crawl to get on top of the Snuuzu mattress and Teraglide platform. This is the highest sleeping option, which gives lots of storage space and a very comfortable bed. The only down side is requiring more effort getting in and out. Once I’m in, it’s great with plenty of room to move. Please forgive the “Tesla Tripping – after dark” photos. Hopefully it helps give a real world idea of the space inside. Sleeping…

Wow, possibly the best amenities for a road trip, at this spot in the middle of nowhere…

…(in the Snowy Mountains). Seats and tables, beautiful location, playground, water, toilets, WiFi. Even has a shower and laundry tubs. Oh, and a pizza oven. Hard to beat! Gotta love the various signs on the amenities (see photos). Thanks to Gippsland Climate Change Network and Chargefox for the destination EV charger here. It’s probably the only public fuel source (of and kind) for over 100km. There are no shops or food outlets here. Fortunately, I grabbed some supplies when passing through Bombala and Cooma, over the past few days. Instant kitchen: pop the Tesla tailgate, pull out the Teraglide drawer and table, flip up the lid to reveal the fridge in the sub trunk. After a couple of hours to eat and chill, off to find a campsite for the night, nearby along the river. I’ll come back in the morning to use the shower. Charging: The EV charger here is just AC single phase, 7kW. That’s much skewer thana fast charger, but enough to give me 14kWh (about 23%) in the two hours I was parked…

In search for a place to camp tonight, I gambled on the solitary green pin that appeared…

…in the PlugShare app (see screenshot), west of me, way off the beaten track, across the Victorian border, in a little town named Tubbut. Plugshare showed no check-ins at that location, but the Chargefox app said it was functional. WikiCamps also showed some freecamp options around there, so it looked like a good option for the night. It was a beautiful drive, along some windy unsealed roads. I followed the navigation, but ended up in the middle of nowhere, I think due to the Apple Maps and Tesla map using different references. At this point, I wished I had Apple CarPlay, so I could show the PlugShare map on the big screen. Turning back a few kilometers, I found “the town”, which is basically just a community hall with add-ons. Fortunately one of the add-ons is the Chargefox EV charger. It exists! And it works! There’s a fuel bowser across the road (pictured), but I don’t think it’s been operational in years. I think the nearest petrol station is over a hundred kilometers away.…

Creekside stop in Delegate.

Pop the tailgate, pull out the kitchen drawer and dining table, grab some sustenance from the fridge. Chilling in the shade, on my collapsible camp chair. Nice. Right next to a camp site, complete with amenities. I need to find a campsite for tonight, but I’ll go further south west. Charging: No EV chargers around here. But plenty of power points, if I was desperate and staying a few hours. No petrol nearby either, according to the sign (pictured). Links:

Heading further across the high plains in the Snowy Mountains.

Not a lot of trees around, but a few wind turbines and windmills, not bothering the livestock or mobs of kangaroos.

No petrol, no worries.

The small town of Dalgety has no working petrol station. The last working bowser I passed yesterday was about 50km away in Cooma, along with the nearest fast EV charger. But Dalgety does have hundreds of power points, including the powered camp sites at Snowy River Holiday Park. I could have used any one of them to fill up my car. It’s a beautiful spot. I car camped there last night. This morning, I pushed the Teraglide kitchen drawer back in, pressed the Deflate button on my Snuuzu mattress, flipped back the top (pictured), and moved the drivers seat back into my preferred position by hitting the Restore button in the Tesla. Super quick transformation, ready to drive on to the next camp site today. Snuuzu mattress: https://www.snuuzu.com/?bg_ref=4fKkJb495B&country=AU Discount code: TRIPPING

DIY laundry line, in the Tesla’s “frunk”. After

my morning shower, the sun started to blaze near the front of the car. Perfect opportunity to set up a laundry line. A couple of suction cups have been very versatile, for quick adaptations, like this. I also washed off the previous day’s bugs from the windscreen, using the small squeegee that lives in the subtrunk.

I wish my Tesla Model Y had a power point, where I could plug in my induction stove to…

…make breakfast 😞. What I need is “V2L”, which stands for “vehicle to load”. Unfortunately, my Tesla Model Y RWD does not have it. This omission almost made us switch to BYD, Kia, Xpeng or one of the many other EV car brands that provide V2L. Tesla’s CyberTruck, new Model YL, and Model Y Performance all reportedly now provide V2L. The Cybertruck has built in power points. The other two require an adapter plugged into the charge port. I can only hope that in the near future Tesla offers some retrofit option for my car. In the mean time, I just have to find a power point, in order to cook. If I had booked a powered site at this location, that would work fine. This morning, I just used the camp kitchen. My car’s massive (by camping standards) 60kWh battery provided air conditioning all night, and has run my camp fridge non stop, via the 16V outlet. It powers other mod cons, such as the lights, wireless phone charging pads, powered tailgate. For more details on this car camping trip, see…

Good morning! Time for breakfast, after a great night’s sleep in the Tesla.

“Siri, open Tesla boot”. The tailgate opens to reveal a beautiful day, beyond my bare feet. Breakfast mode: 1. Pull out the Teraglide drawer and table. 2. Flip open the Teraglide rear lid. It’s assisted by gas struts, so it’s easy to lift and stays up, even with bedding on top of it. 3. Open the fridge in the subtrunk to get brekky supplies. This morning, that’s eggs, butter and milk. 4. Use the kitchen drawer bits to crack and whisk the eggs, add milk, soak some bread, ready to make French toast. 5. Stroll over to the camp kitchen. Fry the toast and boil some water for my thermos. Return to the Tesla. Enjoy my French toast, with a cuppa tea, overlooking the Snowy River. Nice. Links: Snuuzu: https://www.snuuzu.com/?bg_ref=4fKkJb495B&country=AU Discount code: TRIPPING

Photo op in Bredbo, before stopping in Cooma to figure out where to camp tonight.

On the way, I used the Tesla’s navigation to search for “campground” and similar. One option was The NRMA park in Jindabyne. I tapped the phone icon, to make a call. Handy to do it all from the car’s controls. Unfortunately, all their powered and unpowered sites were booked for tonight. This looked like a job for WikiCamps. Since Tesla doesn’t support Apple CarPlay, I needed to pull over to use my phone. Whenever parking, I aim to charge, so I don’t lose any time. So, I pulled into the new-ish Tesla Superchargers in Cooma. This is the second site in Cooma, with more chargers and faster speed. But the only service nearby seemed to be KFC (again 🤔). No matter, I just wanted time to access my phone. Snowy River Holiday Park looks great. I rang them, gave them my ETA, entered it into the navigation, added Cooma Coles as the first destination, so I could grab some supplies. Cooma Coles also has Tesla Superchargers, but fewer and a bit slower. It does have Coles and more amenities, so I…

Sleeping in the Tesla, on a Snuuzu mattress, on a Teraglide platform.

The obvious question: can I fit? Short answer: plenty of room to sleep, rollover, look at the sky, out the window, or my phone. I never banged into the glass or support arch. But, getting in is a bit tight. I had to shuffle through, like a recruit in a commando course. I also forgot to pack a collapsible stool, to step onto, high enough at the back to crawl in. The Snuuzu mattress is super comfortable. It has a few layers of foam, supported by an inflatable layer. With the back seats down, the Tesla floor slopes down towards the back, with a kink where the seats hinge. This makes sleeping uncomfortable, and slides the occupants slowly down to the boot. One way to rectify this is to add a slightly elevated floor, that is truly horizontal. That’s where the Teraglide platform comes in. Teraglide also has a basic model, without the drawer, that isn’t as high as ours. And there are car mattresses that aren’t as thick as the Snuuzu. So, my set up here is probably the highest option. This…

Dinner next to the Snowy River.

I grabbed soup and butter from the fridge in the sub trunk. Heated the soup and toasted bread at the camp kitchen. Enjoyed the simple meal as the sun set, listening to the river. Happy place. My 35L Kings fridge is in the sub trunk. It’s powered by the car’s 16V supply, with an outlet available in the boot and driver’s console. The 16V in turn is powered by the car’s massive 60kWh battery. No need to run an engine, with noise and fumes, to keep it going. Charging: I charged up the car battery earlier today, while parked in Cooma. The hosts here at Snowy River Holiday Park confirmed that in a powered site, I could have plugged in the EV to charge. I instead elected an unpowered site, since it was a nicer spot, closer to the river.

Setting up the Teraglide platform and Snuuzu mattress in the Tesla Model Y.

Steps: 1. Folded back seats down, using the buttons in the Tesla. 2. Slid the interleaved top of the Teraglide platform onto the folded down rear seats. 3. Moved the front seats forward. 4. Unfolded the top hinged bit of the Teraglide. 5. Clipped on the side supports of the Terglide, near the doors. 6. Placed the Snuuzu mattress bag on the Teraglide platform. 7. Unzipped the bag, unrolled the Snuuzu mattress. Unclipped the mattress and opened it up flat. 8. Pressed the `Inflate` button on the mattress. Waited a minute for it to finish, then turned it off. 9. Added bed linen, blanket and pillow. Gotchas: 1. Teraglide (the business) had warned me, after seeing earlier photos of my installation a few months ago, that I had neglected to strap down the front of the Teraglide. With this in mind, I brought along the supplied straps, but I hadn’t yet installed them. When I fully extended the kitchen drawer without anything weighing down on top of the platform, the drawer started to tip over,…

Just me, the Tesla, and some brown snakes, along Lake George, near Canberra, on the way…

…to The Snowy Mountains.

A quick shop at Erina Fair, on the NSW Central Coast, before heading south to The Snowy…

…Mountains, where I will car camp tonight. Charging: Since I’m parking for a few minutes anyway, I connected to one of the newish Evie DC chargers in the Erina Fair carpark. Previously, the only public charging option around here was the Tesla destination chargers in the next car park. Those are free, slower (11kW) than fast chargers, in an awkward parking spot, most often busy, sometimes ICEd. Using the Evie chargers is a breeze – just park and plug in. Since I’ve already setup “AutoCharge”, the system recognises my car without needing to use an app or credit card. The max charge rate seems to be 75kW if I’m the only one at the “bowser”, but reduces to 50kW if another is also in use. Perhaps as low as 25kW if all four are in use? Even when mine was nearly finished and only drawing 6kW, the next charger was limited to 50kW until I stopped.

Along the Great North Road to Wollombi, driving Mum home to Cessnock.

Stopping for a cup of tea and a snack. Instant kitchen and dining, using the Teraglide.

All packed for another 2000km, from Emerald Victoria to Cessnock NSW, and return.

I’m driving Mum to NSW after spending Christmas in Victoria with us. Then I’m driving back home solo, car camping along the way. I’ve installed the Teraglide kitchen drawer and bed platform. The Snuuzu mattress is ready to unfurl. Teraglide: https://teraglide.com?sca_ref=8962510.vFhGsmKvrx8 Snuuzu: https://www.snuuzu.com/?bg_ref=4fKkJb495B&country=AU Discount code: TRIPPING

Time for a break and a cup of tea.

The navigation says that the next EV charger is at Coolac, just north of Gundagai, so we stopped there. Wow. It’s a pretty bad. The chargers are great, simple and fast. But the site is woeful. The hotel is closed or being renovated. The toilets are port-a-loos, but are disgusting . I don’t know how much of that is due to infrequent maintenance versus just being the busiest time of year. There is a service station nearby with some food and hopefully better toilets, but it’s a ten minute walk away in the heat, and not an option for Mum’s walker. Some people were sheltering from the sun under the three tall trees begging the toilets. Not a great spot. Tesla/government really needs to ensure better location for EV chargers. We enjoyed a cup of tea from our thermoses, and some Christmas snacks (thank you Krissy). Some way further up the highway, we pulled over into Bookham, for a conveniently located toilet and a bit of a stretch in some broken shade. In the few minutes we were there, two…

We checked out the new Tesla Superchargers in Batemans Bay. Super fast.

The fish and chips shop next door didn’t have anywhere to eat. The Catalina Club, which hosts the Tesla chargers in the car park was the obvious choice for lunch. We needed shoes to get in 😉. And ID. What a great find. Good food, impressive facilities. Thank you Marie for showing us around. Charging: Charging finished by the time we ordered dinner, so I had to move the car. Unfortunately, no shade in the car park on a very hot day. I kept the air con running in the car to keep our belongings and food cold. No engine, no fumes.

First leg on our 4000km journey: Emerald to Maffra, in Gippsland Victoria.

The tall trees of our Dandenong Ranges gave way to rolling green hills. FSD (Full Self Driving) makes the (non) driving a breeze. One minute I’m singing its praises after it flawlessly indicates and merges into traffic. The next I’m cussing at it for complaining that I was looking at the navigation too long. We stopped in Maffra to grab some lunch, and just made it before small-town-closes-o-clock (2pm), to grab a veg toastie, banana bread and coffee. Next, north, over the alps towards Bright. What are the chances of a sealed road all the way? Charging: We left home with a full tank of solar. At Maffra, we still had 69%, so we didn’t _need_ to charge. But, whenever we’re parked, we aim to plug in. We used the Evie charger conveniently located in the car park behind the barista. It was only 50kW but had fully topped up by the time we were ready to leave. Evie’s “Autocharge” feature is great. You just plug your car in and walk away. The charger system recognises your car, and which…

Lunch stop at Oliver's, just outside Gundagai. I recommend the Oli burger 🍔.

Tesla Model 3 with stripes parked near us. FSD along most of the Hume Highway. It does a great job, and avoids human fatigue. A few complaints, though, including it repeatedly thinking that the speed limit is 100, even when it’s actually 110 (pictured). Occasionally it dropped to 80 or 40, presumably after seeing some random sign off the highway. Pretty good driving efficiency with FSD, too, about 14kWh per 100km. See screenshots. Charging: Tesla Superchargers conveniently located in the car park behind Oliver’s. It’s the first EV charging station I recall noticing, many years ago, long before we went electric. We just park, plug in, walk away. Charging finished just as we finished lunch. Perfect. Takes less than ten seconds of our time. Most Tesla chargers these days are compatible with all EVs. But these at Oliver’s are Tesla only. The general EV chargers have moved next door, to The Dog on the Tuckerbox. It’s now just one unit, with two cables. A few kilometres up the road, in…

What to ask for, in a battery installation?

I suggest getting your installer to agree in writing that your battery installation will include: 1. Remote control via an app and/or website to monitor your battery and house power. 2. During a grid outage, the battery should provide backup for everything you need. 3. During a grid outage, solar continues to provide power. 4. The ability to curtail export of power to the grid when pricing is negative. 5. Compatibility with Amber Electric, if you might want to use them as your energy retailer. Let’s look at each in detail: 1. Using an app or website, you can: 1. Monitor power in and out of your battery, house and grid connection, instantaneous, daily and historical. 2. At any time, set your battery to a minimum charge percentage. 2. In the event of a grid outage: 1. The battery will switch over automatically. The installer should test it and show you. 2. The battery will power all of your home, up to the battery’s maximum power (which should be at least 5kW). 3. If you have three…

What do all the electricity measurements mean?

1. Australian household electricity runs at about 240V “volts”. All your power points and devices are 240V. This is basically a measure of the force used to push the electricity. 2. The “current” is basically the throughput of electricity, measured in Amps. It varies for different devices. A modern LED light bulb uses less than 0.1A (Amps). A toaster or heater will use around 8A. The typical maximum allowed by a standard power point is 10A. 3. The total power of the electricity is measured in watts. We multiply the volts by the amps (voltage x current) to get the watts. For example, if your appliance uses 5A at 240V, then that’s 5 x 240 ‎ = 1,200 W, which is 1.2kW (kilowatts). A light bulb uses less than 0.1kW. 4. The total energy used by a device is calculated as the power x time. For example, if you use an appliance running at 1.2kW for 10 hours, then it uses 1.2 x 10 ‎ = 12kWh (kilowatt hours). A light bulb could run for days on the same 12kWh. 5. When you use electricity from the…

While driving in our town of Emerald to get some Emerald Thai for dinner, I did a double…

…take when I saw a Savic Motorcycles sign, randomly on the footpath. It turns out that they were running test rides today “winding through the beautiful Dandenong Ranges”. What a great idea! Test drives at dealerships and even EV shows tend to be within urban sprawls, which doesn’t offer much of a driving or riding experience. We’ve seen Savic at a few EV shows, including the recent Everything Electric in Melbourne (pictured). I wish I had known it was on, and that we weren’t recovering from a cold right now. Hopefully next time. Savic is an Australian company building electric motorcycles.

Home Battery Introduction

Are you considering a battery for your house? Here is a basic introduction, based on our experience. I hope it’s helpful. Please comment about any errors, omissions or questions. 1. Why is there more talk lately about getting a battery for your house? 1. As of July 1 this year, the federal government will pay for 30% of your home battery purchase. This makes it 30% cheaper to buy one. 2. What’s the purpose of a house battery? 1. A battery provides power to your house, as electricity. 2. It can power anything in your home that runs from electricity, including your fridge, lights, power points, TV. 3. It can keep your house appliances running when there is a grid outage (a “blackout”). 4. If you have solar panels, a battery can store the excess power generated during the day, so you can use it at night to avoid paying for electricity. This is why it is often called a “solar battery”. 5. You can also charge a battery from the grid when electricity is cheap, and use it when electricity is…

What size solar system should I get?

Installing solar is relatively cheap, when you consider that it pays itself off in 3 to 5 years. It will be cheaper overall to install the maximum now, than to try to upsize it in a few years, especially since you will probably only have one chance to get subsidy help. If you have the money or can use one of the government payment schemes, I suggest getting the maximum allowed 10kW system, with slightly more panels (see below). You also need to have enough unshaded roof space to install them. In the southern hemisphere, we aim solar panels to the north for maximum sunlight. A north facing room will produce a high peak of solar power in the middle of the day, when your demand is probably low. So, it’s typically best to place panels on east and west (or north east and north west) facing roofs to skew power to the beginning and end of the day, respectively. On our house, we have all of our panels on a north west facing roof. This skews our production slightly to the end of the day, but…

A few neighbours and friends have asked us lately for advice about solar panels, house…

…battery, EVs etc. Here’s our real life experience, starting a series of posts on different topics. We installed solar and battery when we moved into our house (Emerald, Victoria) about two years ago. We already had an EV (electric car). This week, we finally got around to replacing our gas hot water with an electric heat pump. Next month we’re replacing our gas ducted heating with a multi head split air conditioning system. Overall, our solar and battery provide more electricity than we use. We’re also connected to the electricity grid so we can import when we need more, or export when we have a surplus. We aim to produce all the power that we need. On the rare times that we import electricity from the grid, our retailer bills us. More often, we export our surplus electricity to the grid, for which they give us a credit. Overall, we have more credit than debits, so we don’t have to pay anything. All this depends on your electricity plan, which I’ll discuss in a separate post. The…

Heat pump installation

We finally got around to installing a hot water heat pump, to replace our gas hot water system. We were paying about $40 per month for our instant gas hot water (plus $40 connection fee). Now we’re paying nothing, because the heat pump is just using our excess solar power. Without solar, I estimate it would be costing us $8 per month to power it from the electricity grid. There are a few incentive schemes around to replace gas (or other old inefficient systems) with a heat pump. An installer will factor these into their quote. The subsidies can be significant. In our case, the total price was $4480, but it was reduced to $1650 for us to pay, after subsidies were subtracted. A hot water heat pump uses the same principle as an air conditioner (which is also a heat pump). It “pumps” heat from one side to the other. In this case, it pumps heat from the outside air into the tank of water. The basic physics is that when you compress air in a confined space, it gets hot, and when you expand…

Final day at Everything Electric Melbourne, starting and ending with Jack Scarlett.

Test drives, a panel talk about road tripping, EV conversions, and a flux capacitor, some of the highlights.

Some random shots from Everything Electric Melbourne today.

After a few years in Sydney, this is their first showing in Melbourne. It’s noticeably smaller, but understandable for the first appearance. Interesting panel talks. Informative staff at product booths. Huge variety of test drives available, including self driving Tesla cars. A few food truck offerings. They need more undercover seating (from sun or rain). We recommend the falafel wraps.

About $25k for a new BYD Atto 1.

Wow. EVs are now approaching the price of comparative ICE vehicles. Unfortunately, BYD couldn’t get their Atto 1 prepped in time for the show, but they did have the Atto 2 on the floor (pictured). At Everything Electric Melbourne.

Checking out the Farizon electric van, decked out as a camper.

Also the popular BYD Shark electric ute (plus hybrid range extender), and some towing options. At Everything Electric Melbourne.

Nice interior of the Geely EV, at Everything Electric Melbourne.

So many EV options available now.

Dancing, flipping, rolling cat robot at Everything Electric Melbourne was a crowd pleaser.

No litter box!

Nice to see some services (like Goodbye Gas) available to help homes get off has…

…upgrading to electric. Better for health, monthly bills, and clean air. At Everything Electric, Melbourne.

Some of the many scooters, motorbikes and e-bikes at Everything Electric Melbourne.

A couple of electric police cars at Everything Electric Melbourne.

A Tesla Model X and Kia EV6, I think.

Big wheels keep on turnin’, electrically!

Trying out a big rig at Everything Electric show Melbourne