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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…
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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…
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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…
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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…
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What do the kW and kWh measurements mean?
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…
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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…
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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…
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Our Powerwall — one of a million deployed
Our home Powerwall battery is one of a million deployed so far. The Tesla app celebrated by listing the stats of our install, and the fleet as a whole. Our battery has saved us (and our neighbours via extension cords) from 13 days of blackouts, without any noisy smelly generator, or trips to refill it with petrol. Our solar system has generated 16MWh of energy so far, used by our house appliances, home battery, our car and exports to the grid. At an average ball park price of say 15c per kWh, that’s $2400 worth of electricity, with no ongoing running cost.
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Finally, the Dandenong Ranges Botanic Garden
After two years in the Dandenong Ranges, we finally visited the Dandenong Ranges Botanic Garden. Amazing to see in Spring. It’s a huge place. I think we covered only 20% of it. Parking seems to be extremely limited and unmarked, in a dirt section across the road, which led to highly questionable parking.
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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.
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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…
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A new find: Ripe Cafe in Sassafras
In life you need goals. Today’s goal was to find a cafe we hadn’t yet tried 😉, in our home of the Dandenong Ranges. Ripe Cafe in Sassafras was a great find. Guacamole (avo toast) topped with thin sliced potato crisps, and zucchini slice. Lots of cyclists out today, including this giant Saint Bernard. The local park has interesting seating, or perhaps a one turn swing set 😳. I checked in on our parked car from the Tesla app, after some dodgy parking in front of us. We love driving through the fern trees and tall timbers of the Dandenong Ranges. Beautiful all year ‘round.
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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.
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Emerald's Lost Woods Market draws a crowd
This is probably the busiest we’ve seen our town of Emerald, Victoria. The Lost Woods Market draws a huge crowd. It’s a beautiful stroll through the tall trees, past numerous stalls and food outlets, with Puffing Billy Railway choo-chooing past every now and then. It’s a magical place. We parked up the other end of town, starting off with brunch at Over the Road Cafe, then walked through the jammed main road to the markets. The generators of many stalls lined the back path, filling the air with slight fumes and noise. It’s a shame they don’t have grid power. We hoped to see some stalls powered by V2L EVs, as we’ve noticed at some other markets, but none here.
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Home in Emerald, autumn in full swing
We arrived back home, in Emerald Victoria. Autumn is still in full swing. 🍂
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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.
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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 🤔.
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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.
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Cooling off at Seaford Pier
Cooling off at the beach under Seaford Pier. Dinner: Chicken and mango salad, brought from home.
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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…
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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 😉.
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36 wild hours on battery in the Dandenongs
It’s been wild 36 hours here in the Dandenong Ranges. Yesterday afternoon, the power went out in our town of Emerald. We heard it was due to a fire somewhere. We sent out a few texts to our neighbours to offer our battery backup power. We ran our heavy duty extension lead over the fence and set up a power board on the front porch for phone charging. A few hours later, the grid was back up and running. But, the pending storm warnings made us cautious. Sure enough, an hour or so later, the storm hit. Heavy rain, pounding hail and strong wind. Marvin the robot mower happily sits charging out in the rain. But I didn’t fancy the chances of his camera eyes surviving the hail stones. I used the iPhone app remote control to drive it under our pergola, while the ice golf balls bounced on the lawn. Sure enough, the grid connection died again during the night, probably due to storm damage to power lines and other infrastructure. In the morning our neighbour reconnected to our power supply. We…
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Lauritos pizza, transported in the frunk
Friday night, pizza and movie at home. Pick up from Lauritos Pizza, in Emerald, in the Tesla, transporting it in the “frunk” (front trunk) to keep the takeaway smell out of the cabin.
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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,…
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Four double scoops, kept chilled by the Tesla
Double the EVs and double the ice creams. This time I took a large container to Bam Bam Italian to buy four double scoop ice creams for us and our guests. The car kept the temperature at a chilly 15°C while Kyla accepted the challenge to scoop two spheres into each cone. Tomorrow, we’re off to Emu Plains Markets.
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An 'EV' for the hedges
I tried out another “EV”, kind of – an Electric Vegetation cutter 😉. Okay, that’s a bit of a stretch. It’s an electric hedge trimmer. Emerald has so much vegetation, and our place is no exception. Hundreds of meters of hedges. The RYOBI electric hedge cutter is fairly quiet, instantly turns on and off, and is fueled for free by the sun via our roof solar panels. While cutting, it did occur to me that using a petrol powered hedge trimmer would be a much less pleasant experience. Much louder, with fumes in my face, heat and higher fire risk. I’d be dependant on an external fuel supplier to truck in petrol from hundreds of kilometers away, and I’d have to drive to a petrol station to get it. When the battery goes flat on this electric model, I just plug it in and walk away to do something else. It will take an hour or more to recharge, but I don’t have to do anything. Plugging in the battery takes a few seconds. If I really wanted to keep going immediately, I could swap with another…
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Nine days of grid outage in Emerald
It’s been nine days of grid power outage here in Emerald Victoria. The community has pulled together to share resources. Today I received an SMS from Ben to ask if he could charge at our place. I assumed it was another neighbour asking if they could plug their phone or laptop in to the power board we laid out in the porch. We were the only house in the street to still have power after the storm hit, thanks to our Tesla Powerwall battery. It’s been charging up each day from solar panels on the roof. But Ben was actually after a place to charge his EV. I had forgotten about our listing on PlugShare during all of the neighbourhood blackout dramas. I said yes, no problem. Today he had driven from his home in Packenham east to Sale, then back west and up the hills to Emerald, and has a few more nearby drives to do before returning home. The navigation said he would get home with 8% charge, but that wasn’t accounting for extra stops. So, he wanted to play it safe.
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Back home with battery power
We’re are back home in Emerald and have power! The grid is still out, and is expected to be down until mid next week. But our house is getting power from solar and our Tesla Powerwall battery. Driving back home (after our road trip to NSW), we could see why Emerald is still in the dark. Many power lines (and phone/broadband lines) are still down. Emerald featured in the first story on last night’s (Friday) ABC news: https://iview.abc.net.au/show/abc-news-vic At least one of our neighbours is running a fuel generator. Another has a couple of solar panels hooked up to a car battery for night lights and a 12V car fridge. Schools are effectively closed. The local petrol station had one pump going, with a long queue. We have offered our neighbours electricity from our solar/battery power. One family had no power for three days, but now we have connected some extension cords over the fence. History: The grid died on Tuesday 14th. We were away road tripping in NSW. Our Tesla Powerwall…
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Powerwall hits zero during the grid outage
Well, that’s not good. The Tesla Powerwall at home has just gone flat (zero percent charge) at about 5pm today. Our new home town of Emerald is one of many affected by the grid outage in Victoria, after a wild storm hit on Tuesday afternoon. A couple of months ago, we had Lightning Energy install solar and a Powerwall battery at our new home. In a grid outage, the solar array is supposed to keep the house electricity going, recharge the battery each day, and keep the fridge cold. But the solar production stopped working when the grid outage started. Something is wrong with the installation. The battery has slowly depleted, until it hit zero percent two days later (this afternoon). I contacted the installer, Lightning Energy, a couple of days ago to hopefully fix it before the fridge died. No answer from service. So, I SMSed Andrew, who works for them and lives locally. He kindly offered to pop in on his way home to take a look. Here’s hoping we can get power from the sun back…
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Wild weather hits Victoria
Wow, what a wild weather ride in Victoria yesterday. We’re still in NSW, but the Weather app summarised the weather at home in Emerald as “Fire Weather” 😮. The heat was followed by a heavy storm that knocked down many trees and power lines. In the middle of the day, wholesale electricity prices peaked at a hundred times the norm at nearly $20 per kWh (normally under 20c per kWh). I checked our home remotely using the Tesla app. It was exporting power from our battery (and solar) to help keep the grid supply going, whilst paying us about $100 per hour for the supply! Our battery has continued to supply power to our home during the blackout. We messaged some of our neighbours an invitation to come over and plug in any needed devices (such as phones or a portable fridge). A few of them also checked on our house for us. Great neighbours and community ☺️. We might need to also offer them showers because those with on demand gas hot water often need electricity to light them. All the petrol…
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Tesla battery and wall charger installation
The team from Lightning Energy installed the undercover pieces today, while it’s raining, and deferring to tomorrow the installation on the roof of the solar panels, if the sun comes out. We had originally scheduled this installation for December 11 and 12, but rain on December 11 saw it canceled. We had this Tesla wall charger at our last house in Saratoga NSW, a year ago. The new owners there didn’t have an EV, so we modified the contract for us to remove the EV charger. It has sat in storage until the removalists delivered our belongings here a few days ago. It wasn’t really practical for us to bring the Tesla “Powerwall” battery with us from the old house, so we bought a new one for this house. It costs about $15k, which is a lot. There are cheaper battery options, but we know the Powerwall has a large capacity compared to cheaper batteries, and works well with the app, scheduling, blackouts, etc. We have heard from a few people in Emerald and the Yarra Ranges in general that…
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Woodend and Kyneton house-hunting
Today we drove out through the towns of Woodend and Kyneton, Victoria. Beautiful towns, even on a cold windy day. We’re still looking for a possible new home. We looked at one house at Kyneton Bushland Resort. Another house had 14kW of solar panels, a Tesla Powerwall house battery and a Tesla EV charger. Lunch at Home Grown on Piper was delicious. We bumped into the owners of a blue Tesla Model Y with the licence plate BEM3UP (“beam me up”) at one of the houses and at the Kyneton charger. Of course we discussed Star Trek 🖖. Also had a brief chat with Tony, on a ride on his electric Harley Davison LiveWire, with his other biker mates.
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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.
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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.
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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.