-
FB
HQ
HQ
Adding a second battery
When Lightning Energy installed our Powerwall 2 back in December 2023 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 start fresh with new hardware. For me, that…
-
HQ
FB
HQ
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…
-
HQ
HQ
HQ
Goodbye gas — disconnecting the ducted heating
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. 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. 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. They both needed electricity to run. In fact, in addition the gas consumed, the heating used about 1kW of…
-
HQ
HQ
HQ
First Tesla service call: a new wheel
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…
-
HQ
HQ
HQ
Great chargers, sad site, at Coolac
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…
-
HQ
HQ
HQ
Oli burger and FSD on the Hume Highway
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.
-
HQ
FB
HQ
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…
-
HQ
HQ
HQ
Solar, battery and electrification — series intro
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…
-
HQ
HQ
HQ
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…
-
HQ
HQ
HQ
On our way to Coober Pedy — first Glendambo stop
On our way to Coober Pedy, the plan was to stop here at the Glendambo Roadhouse for lunch and top up “fuel” for the car. Glendambo seems to consist of three main buildings: on the left, an old run down, decommissioned service station. In the middle, a roadhouse/pub, with access to motel rooms and camp ground behind. On the right, a newer service station with simple hot food options. I heard the service station staff saying that they had run out of diesel fuel, awaiting a delivery in an hour or two. A truckie reported to say he had thousands of litres parked outside, but he couldn’t give it up, since it was bound for Coober Pedy. If there’s no fuel, there’s no plan B. You just have to wait and hope. We chatted to one of the guys towing the rally car with skulls, appropriately named “Numb Skulls”. They’re headed from home in Katherine, NT south for the Variety Bash near Adelaide, then back home. That’s a lot of towing.
-
HQ
HQ
HQ
Charging confusion at Spud's Roadhouse
Although it’s in the middle of nowhere, Spud's Roadhouse is a great place to stop on the way to Uluru. For one, it has a few EV charging options. Now, charging should be simple, like it was for the two EVs that were here when I arrived. They each plugged into one of the two DC charging cables, walked over to get some food at the roadhouse while their cars charged. Then off they went – one towards Adelaide and the other to Roxbury. But life isn’t always so simple. I plugged into the remaining charger, which is a slower AC station. It’s only 7kW, compared to the faster DC adjacent chargers at 80-150kW. But, that’s fine – I’m staying here overnight, so I have the time, or I could have just used a fast charger when one of the other drivers disconnected. This AC charger requires your own “Type 2” (technically “Mennekes”) cable, which we have, so I plugged it into the car and EV charger. To my surprise, it immediately started charging, without using an app or tap card. I left it connected…
-
HQ
HQ
HQ
Walking the Murrumbidgee levee in Wagga
Out for a walk along the levee bank along the Murrumbidgee River in Wagga Wagga. Beautiful day, warmer now with the sunshine. Lots of people camping by the river, I presume as their homes. Must be so cold at night.
-
HQ
HQ
HQ
A fluid swap at Oliver's Real Food, Gundagai
Quick stop for a fluid change (hot chocolate in, wee out) at Oliver's Real Food Gundagai.
-
HQ
HQ
HQ
A cafe opposite the Yass Superchargers
Stop for a late lunch, in Yass, at Kaffeine 2582. We picked this place, because it’s opposite the Tesla Superchargers. I wonder if the cafe realises how many EV drivers now eat at their cafe 🤔.
-
HQ
HQ
HQ
A solar-powered coffee stop at Glenrowan BP
Coffee stop, just north of Glenrowan, at the BP service centre. The Tesla/Google navigation only knew the south bound service center here, so the directions tried to send us over the highway 🤪. Thanks to the nearby solar farm that provides the power to the grid that found its way to our car. We overheard someone paying $1100 for fuel, presumably a semi trailer. Wow. 😮 Home baked Anzac slice (thank you Krissy) was the perfect accompaniment for the coffee and thermos of tea. The small birds begged us for crumbs. On towards Wagga.
-
HQ
HQ
HQ
Why NRMA Airlie Beach is a shining EV light
The NRMA Airlie Beach Holiday Park is a shining light. EV destination chargers at each of the new cabins. Fast chargers out front for the public. Efficient electric hot water heat pumps. On site cafe and coffee. E-bikes. Walk to nearby Coles and shopping center. This is the future. Well done, The NRMA! Missing our own EV right now, still parked back in Melbourne airport.
-
HQ
HQ
HQ
Tetris-ing four people, a fridge and luggage into a Model 3
We know our Tesla Model 3 can fit a 50L camp fridge. And we know it will take a large travel suitcase, or four people and some luggage. But we didn’t know if it would take all that at the same time. It took a fair bit of Tetris-ing, and the boot strained at the seams, but we managed to get everything in. I think we might need a bigger car. First stop at Eumundi Markets. We parked in the shade and later opened the boot so the fridge had some outlet for the hot air. Second stop along the highway at Burpengary for some fast food lunch. Then we delivered Erin and Isaiah to their accommodation in Brisbane before their flight back to Airlie Beach tomorrow.
-
HQ
HQ
HQ
Crepes for breakfast at Botero Cafe, Maclean
Crepes filled with chocolate mousse, banana and cherry sauce is a perfectly legitimate breakfast, according to Botero Cafe, in Maclean. Onward north towards Coollum Beach in Queensland.
-
HQ
HQ
HQ
Arriving in Venice
We arrived in Venice! I’ll let the photos speak to the beauty and hustle bustle of the place. Best to view them in landscape, full screen, and zoom in. It’s gorgeous. The chaos and fumes of narrow roads is gone – replaced with similar in canals. The walks through town are delightful. So many shops and things going on. It was supposed to be an easy transition for us today, with a one hour drive from our previous night’s stay near Verona. But it ended up being a big day. Here’s a list of our challenges and goofs today: 1. The police escort through Verona. That deserves its own post. Stay tuned. 2. We searched Booking.com for accommodation in Venice that included parking. We were aware that you can drive to Venice but not into Venice. We hoped to find accommodation that provided some parking so we wouldn’t have to arrange a shuttle, repack and lug bags too far. It was a long shot, but we found a match. It wasn’t until after we booked it that communication with the coordinator revealed…
-
HQ
HQ
HQ
Walking the Aare Gorge, then donkeys
We spent the afternoon exploring the Aare Gorge, along the elevated board walk. Beautiful. Lunch on site. We couldn’t leave the area without patting a donkey and Shetland pony. So much beauty all around. Delivered spaghetti and pizza for dinner, back at our hotel. We’re in training for Italy in a few days 😉.
-
HQ
HQ
HQ
A quick stretch in Rotterdam
Second stop on our trip south, at Rotterdam. Just long enough to stretch our legs with a short walk around town, and grab a coffee.
-
HQ
HQ
HQ
Borrowing Nico's Jaguar i-Pace
On our way from Krommenie to Maastricht. We picked up Nico’s Jaguar i-Pace. Very swish. 0 to 100km/h in about 3.5s. Luxury interior trim. Neat console. It has fast DC charging but only does 3.6kW AC charging (compared to our Tesla’s 11kW). It’s about twice the cost of our base Tesla Model 3 at home. Jaguar had it for a few days to replace the battery. This is the first real example I’ve seen of someone actually needing to replace their EV battery, despite all the hype about it from naysayers. Fortunately, it was all covered under warranty. Our first stop was in Breukelen at a service center. Well, we actually stopped at two of these, because of mixed up convoy instructions. Next to the Shell petrol station here is a FastNed charging bay, with solar panels on the roof. Most service centres seem to have these, which is terrific. It kills me to stop for fuel like this. Stopping specifically for fuel (charging) is something I try to avoid. I prefer to just charge when I’m parked for some…
-
HQ
HQ
HQ
We bought a Mammotion robot mower
We bought a new EV! It’s all wheel drive, includes full self driving, with proximity sensors and just a front facing stereo camera. But it takes about four hours to fully charge and the acceleration is pretty slow 😉. It’s a Mammotion Tech Luba 2 robot lawn mower. We could have bought it online direct from Mammotion, but opted to buy it through a local service centre, Robotech Australia, just in case we need support or maintenance. Our lawn is about 1500 square metres. We bought the Luba 2 AWD 3000 model, which is rated to mow 3000 square meters, allows up to ten mowing areas, and handles extra step inclines. The base model does 1000 square metres, and allows less separate mowing areas. There are also 5000 and 10000 models. I followed the fairly simple hardware instructions to screw in the camera (which looks like Wall-E), screw the charging station into the ground, and assemble the transmitter (RTK) onto a pole. We have named the robot “Marvin” (the mower). To misquote Hitchhiker’s…
-
HQ
HQ
HQ
A Seven Hills stretch on the way to Newcastle
On our way today from Goulburn to Newcastle. Time for a toilet stop and stretch in Seven Hills. I tapped the charger icon on the Tesla screen and one of the options it showed was 10km ahead along our route, in Seven Hills, which seemed likely to also have toilets. I tapped that location, added it to our route. The Tesla realised it was a charger and started preconditioning the battery (for faster charging on arrival). Lots of road works out here on the highway. I found it difficult to determine which of the lines on the road were removed and which were the new ones, in the glare of the sun on the road. At one point, a ute in front of us was straddling two lanes until some other cars behind alerted them to the misalignment. Somehow our Tesla’s Autopilot managed to make sense of it all and kept us in the correct lane. Super impressive. Mum’s Apple Watch didn’t charge last night in the motel, so we plugged it into the USB-C port in the car. Onward to the NSW Central Coast, then Cessnock,…
-
HQ
HQ
HQ
A hello to Ned Kelly in Glenrowan
Stopped for lunch in Glenrowan and said hello to Ned Kelly. Great town for a visit on the way through. Followed by a brief stop in Yea before arriving home in Emerald.
-
HQ
HQ
FB
A bug-spotted windscreen, with no clean-up
Final leg to the NSW Central Coast today. First stop for bladders, so we pulled into the next service center along the Hume Highway. A fresh spotting of bugs adorned the windscreen. But there’s no cleaning facilities at the chargers 😞. We pulled into the adjacent service station. I opted for the least busy section, which was for trucks, planning to get out quickly. I grabbed the handle of the cleaner from the bucket, and wiped the windscreen a few times. When I went to dry the drips from my hands, I realised that the handle was covered in grease! And now also my right hand. It took some time and effort to get that off, so as not to wipe it on the white interior of our car.
-
HQ
HQ
HQ
Tyre rotation — and a recommended replacement
Slightly overdue for another tyre rotation (16,700km since previous check, but due at 10,000km intervals). So, I booked one in via the Tesla app, which quoted $71.28. Mobile service came to me. Amar, the Tesla technician, was very friendly, efficient and helpful. All his tools were in the trunk and frunk of his Tesla Model S service vehicle. He showed me that the tyres had unevenly worn, so the inside tread (on the right in the photo) was below spec on all tyres, requiring the replacement. He said he could cancel today’s call-out (so, no cost to me) and book in a tyre replacement at the Tesla service centre (big cost). I asked him to make it so. Follow up: See the post about the subsequent actual tyre replacement at the service center, here:
-
HQ
HQ
HQ
JOLT charging at Ferntree Gully Station
I charged up again using the JOLT Charge at Ferntree Gully Station, while doing some work on my laptop. While there, a Nissan Leaf pulled up next to me. The driver, Tony, told me that he wanted to try out the Jolt charging for the first time. He bought his Nissan Leaf two years ago as a “grey” import for $18,000. It’s a 2014 model. It has a 24kWh battery but now only gets about 100km on a full charge. He also said that it doesn’t have great thermal management of the battery, so regular fast charging can be problematic. For comparison, our bottom range Tesla Model 3 has a 60kWh battery and gets 360 to 440km on a full charge. The technology has certainly come a long way since the original Nissan Leaf cars, but they paved the way.
-
HQ
HQ
HQ
Loan Model Y day out at St Kilda
After the morning downpour across Melbourne, the sun started to emerge for us as we walked along St Kilda beachfront. Yummo Greek lunch at Beachcomber Cafe St Kilda Beach. You might notice that our Tesla is a bit larger than normal. It’s a loan Model Y, while our Model 3 was at the service center in Mulgrave.
-
HQ
HQ
HQ
Windscreen replaced at Tesla Mulgrave
We followed the instructions in the Tesla app to bring our Model 3 to the service centre at Mulgrave. Great system. We were getting the windscreen replaced, because the chip is larger than the 2.5cm limit of repairs and we had elected the extra windscreen cover with NRMA Insurance. Glad to see that a loan vehicle is standard issue, from Tesla. At the drop off desk, we requested a Model Y, so we could try it out for the day. We explored the bigger storage space and potential sleeping/camping space. When we first hopped in, it felt like a mini van compared to the Model 3. It felt very high. Easier to get in and out. More visibility out the front window, due to the height. Less visibility out of the rear window, partly due to the smaller area (which actually wasn’t so bad) but more due to the extra tinting on the rear window. The roof window visibility is great. We watched some kind of air show (perhaps the Roulettes?) flying over Melbourne while we waited in traffic. The Model Y is…
-
HQ
HQ
HQ
Hurstville Travelodge, with an EV charger
We drove through the evening from Murray’s Beach to Hurstville, to at least make it south of Sydney CBD before the next morning peak traffic. We checked Booking.com for accommodation in the area with an EV charger, and checked in to Travel Lodge in Hurstville. When we arrived, we couldn’t figure out where to park. Not clearly marked for Travel Lodge. With pillows tucked under arms, bags in each hand, we emerged through the lifts at… the club up the road, much to the amusement of the club staff. We then walked down the road to Travel Lodge, checked in, and moved the car. I grabbed some pizza for dinner, down the road, but spent ten minutes trying to find my way out of Westfield.
-
HQ
HQ
HQ
An unusual charger layout at Miami Aquatic Centre
We charged up at Miami Aquatic Centre. The charger is between the parking spots, in a layout I haven’t seen before. I guess it’s more flexible to plug into front or rear car chargers without turning the car around. The display seemed to indicate 75kW, but I only got 37kW out of it, even though I was the only one connected. I checked in on PlugShare, so I could be alerted if anyone was waiting, while I charged up to 100%. If anyone else was waiting, I would disconnect after 95%, when the charge rate slows. However, there was a guy waiting in an MG. He hadn’t checked in using PlugShare and the Chargefox app doesn’t facilitate waiting, so I didn’t know he was waiting. I happened to look sideways at one point to see him parked in the other EV bay, which he’s not supposed to do, since it blocks others who might want to use the Chademo connector. But if he hadn’t, I wouldn’t have noticed. He is an Uber driver and this was his second time charging that day. He said he is waiting on a wall…
Formerly: Tesla Tripping
Come along on our EV road trips around Australia and Europe, and follow as we progressively electrify our home in Emerald, Victoria.
Join us on the road. We set off in late 2022 and drove eastern Australia in our Tesla Model 3 — Sydney, Dubbo, Armidale, Brisbane, Cape Tribulation, then down through Queensland and back. We've since upgraded to a Model Y.
We've kept exploring — Uluru, the Snowy Mountains and Gippsland, and a longer run through Europe in 2024. There's plenty more on the map, so come along for the next leg.
At home in Emerald, in Victoria's Dandenong Ranges, we're progressively electrifying everything: rooftop solar, a home battery, a hot water heat pump, air conditioned heating and cooling, and EV charging straight from the sun. We're going fully electric, off the gas.
Got questions, or insights of your own? We'd love to hear them — please drop a comment on any post.