Powerwall 3 + Expansion Unit (27 kWh) and a Tesla EV Wall Connector, going onto a single-phase house in Belconnen, ACT. But the batteries aren’t just the interesting part of this pallet. The interesting part is everything else, because that’s the stuff nobody sees on a quote and it’s most of what determines whether the install goes well.
We just bought a house with 19kw Solar and Sungrow 15kw 3P invertor (SH15T). Now I would like a battery.
Has anyone purchased or quoted Sungrow battery during last 6-12 months?
Hi,
I got the following quote.
Solar = 15.2kw
Inverter = 15kw
Battery = 48.72kwh
What are your thoughts and comments on this. What should I be aware and cautious of with the quote?
Location - SW Sydney
Any idea if this quote is any good. In Syd
10.45kw 475W Trina Solar Vertex S+ 10kw GoodWe EHA-G20 Inverter 24kw GoodWe BAT-D-G20 Battery $14500
Firstly, how's the price. Secondly, would this be big enough use abut ~30kwh in winter and ~20 in summer, but yeah planning to install AC soon. Would this be big enough? Would like to just get it the bills down to just paying for the daily rate.
Should I just upgrade my 12 year old 5kw to something bigger with batteries in Gladstone Queensland
I have no idea what’s good or not, any advice if this is a solid price or are there better systems/price out there? Really just looking to run off battery at night and run the aircon in the summer without having to sell organs. In Brissy.
$22,242 after discounts and grants for 10kw system and inverter with 18kWh Sigenergy battery.
My wife and I received a quote for a large system install as family is expanding and PHEV in near future.
The after rebate price looks attractive, however I feel there maybe be a hidden premium as the prices are not itemised.
Based in Brisbane.
sorry typo in title, should be $23k
We’ve been provided with the following quote on a major renovation. Seems a little on the high side but keen to hear views from anyone with a similar setup.
We are NSW based if that is relevant. $23k after rebates.
11.4 kWDC Solar system size
27 kWh Battery size
SOLAR PANEL: 24 × 475W Suntech Power Ultra T 3.0
INVERTER: 1 × Sigenergy 15000W Three phase
BATTERY: 1 × Sigenergy 27kWh
Not a sparky so hope I'm using the right technical terms here
Installed an offgrid Sonnen Eco battery in 2024 before the subsidies were a thing- chose not to go the VPP route
Smart meter installed but battery install not configured to ever feed back into the grid until the battery is full ( this was my choice as install was before the subsidy, subsidy does require VPP )
Since at least October 2025 I've noticed it's really erratic. Sonnen App reports serious inconsistencies, and sometimes improbable displays ( sucking power from the grid but reporting 0 power draw to either house or battery ) See pic above
Often the house power/ lights flicker badly. Had that checked by Essential Energy- they did a serious job of logging at the board, and at various points before and after the pole then the transformer ( there had been bad issues once and transformer had been replaced ). Essential Energy techie who I trust sent me the data and said the faulty signal is being sent into the grid, not being received from it
Stupid battery unit is also pulling power from the grid at peak times when the battery is well above my 10% reserve level. App can read 80% battery charge and decide not to use it, and suck from the grid
Damn thing is costing me money when it should be saving it. And the flickering is making me concerned for all my circuit boards
I've emailed Sonnen Australia often, including screenshots and the downloaded data. Gotten fast replies, but nothing fixes the problem. Unit is out of warranty ofc
NSW Electricity Ombudsman doesn't handle ongoing issues wrt standalone battery manufacturers and have suggested I contact NSW Fair Trading, this is in progress, but I don't like my chances this far out after install
Anyone else having similar issues with offgrid/ Sonnen in NSW?
When we put in a grid-tied solar system years ago the panels were a significant part of the cost. Now BETTER panels are available cheaply so I picked up 5 surplus modern 440 watt panels and stuck them on the shed roof. They produce at least 33 volts all day at anywhere from a few amps up to and even beyond their rated 15 amps (measured short-circuit) so easily 2,000 watts under a clear sky. They're doing nothing yet even though I have a 3,000 watt inverter and some charge controllers because every 24 volt battery option makes this second system uneconomical so I'm seeking outside-the-box suggestions. I don't have confidence in the "good as new" used camping batteries on FB as I've no way to evaluate how much life is left in them.
There are lots of YouTube videos of people using these stand-alone systems to run air conditioners and other things directly on sunny days (which we have in abundance here in Brisbane) but they're mostly Mercun 120v examples. I've come across ONE innovative Aussie who's using his panels to directly charge an EV without an in-between battery using a microcomputer to talk to his car's onboard charger but I don't (yet) have an EV. Until and unless I get one in which to dump all this "free" daytime electricity there must be some way to offset our current consumption so as to maximize the generous FIT we receive each quarter from our old system. Has anyone else given any thought to this sort of thing? Surely there's an alternative to the usual PV->Controller->battery pack->240v inverter paradigm?
Edit. I had one successful experiment where I connected them all in series to directly boil a(n unswitched) kettle almost as quickly as if it had been plugged in as usual.
there's a heap of these that pop up each week but there's no specific rule against them (or any rules tbh). does anyone else wanna see these be confined to the bin?
(if anyone wants to use them, then head to ozbargain)
Leaning on sigenergy battery but most installer I talk to are saying goodwe is better or easier to maintain. Any thoughts on this?
Trying to get solar panel for 6.6kw and battery atleast 18kw. Thanks.
Hoping for some advice on this quotes I’ve had for solar.
Based in Adelaide, already have a 6.6kw panel system with no battery.
In winter with heater we are buying about 1000kwh/month and selling 150kwh to the grid. Past 2 months power bill has been >$500!
This will only go up as we are getting an EV and pool pump in the coming months.
Planning on getting another 5kw of panels (no more north facing roof real estate), EV charger, mandatory inverter upgrade (have been upsold 15kw inverter, but only a few hundred extra), and 24kwh battery (option 2).
At this point I don’t think bigger battery will be economical, but happy to be convinced otherwise.
Any advice much appreciated!
Have had a few quotes done and just struggling to work out what to go with. Seems to be between Sigenergy and Goodwe.
Not sure if the quotes are resonable?. Located in Sydney.
Looking for opinions/advice.
Thanks
Getting quotes in Melbourne for a 9.5kW solar system, inverter + EV charger. House is completely electric and are now using 35-40kW a day since getting the EV. WFH 2 days a week so can charge the EV during the day
Would like to get a smart EV charger that integrates with the solar system to direct any excess towards charging the EV. Does that mean that I should be aiming to keep the inverter and EV charger the same brand?
Current quote for Jinko 9.5kW panels, Goodwe EHB 10kW inverter and Goodwe 7kW AC EV charger is 10k (after STC, not eligible for Vic rebate). Would it be worth getting quotes for Fox, or is it not possible to get the EV charger to integrate with solar in the same way?
Battery would be ideal but not sure if the payback makes sense for us currently and seems to almost double our quote amount. Potentially cheaper if I get prices for a Fox system.
Any input would be greatly appreciated!
Hey guys - pretty much the title. Thinking of getting solar + a battery. Would whoever is doing the installation need access to the inside of my house beyond possibly the attic?
Just trying to figure out whether it's something I need to be home for from start to finish, or something I really only need to be home for for a sign-off/handover.
Hi all,
Feeling abit over whelmed, and not sure what quotes to go for.
Anyone able to tell me if these are decent? Or any other recommendations?
Fairly large house, with moderate usage, pool pump and aircon going hard, and plans of an EV in near future.
Thanks
Have attached my current usage to date for the month so far. Located in SEQ. 13.3 kw system with a 10kw inverter and 42kw battery
Currently with alinta and looking to switch as I feel I’m not getting the best bang for my buck.
We are completely self sufficient off the battery and exporting on average 18kw per day. We don’t have a hot water timer yet and all showers are currently outside of the solar time so this will also improve our figures.
My issue is I’m still paying some of the daily charge. The fit with alinta is pretty poor at 2c per kWh so not much is recovered. I shouldn’t complain about a $30 per month bill but I’d like to get it closer to $0.
Thinking of switching to globird though have researched quite a few other companies but hoping to hear everyone’s thoughts.
Cheers.
Hi. I'm trying to figure out if I'm onto a good thing here or not with my energy plan. I'm hoping someone can crunch the numbers to see if I can do better with another provider
I had a 36kw Sigenergy battery with a 15kwh 3 phase inverter installed 2 weeks ago. I've got about 16kw of panels on the roof. I'm in self consumption mode on the Sig app.
My energy retailer (Engie) pays me a 12 cent FIT all day. The daily supply charge is $2.17 and the flat rate is $0.47 per kWh. There is no TOU tariff just a flat rate.
In 14 days I've only imported 4.78 kw from the grid and exported 312.39 kw
I know the DSC and flat rate are high but getting 12c FIT all day is pretty decent.