I’m planning to get a battery for my solar panels in the near future, but am pretty overwhelmed by the amount of different brands there are. Even narrowing down to the size we’d need for our energy usage, there are still a lot of choices, and they’re all double the cost of similar sizes in the US, so I really want to take my time and be 100% sure of my choice. I’d love to hear from anyone who has installed a battery, what did you get and what’s the size of it and your panels? Are you happy with the brand? Did it meet your expectations?
I’m very set on getting a battery for various reasons, so am not really considering alternates at this time. Thanks!
(I hope the flair is appropriate… it seemed to fit the best. Sorry if it’s the wrong one!)
4 comments
Do you already have solar panels? In that case you should use your past data to calculate how much battery you need to archive your goals
House batteries tend to not be cost efficient compared to an electric car, especially if you are going to get an electric car anyway.
It is 176万円 for a 9.8 kwh house solar battery ([https://www.solar-partners.jp/contents/91419.html#back](https://www.solar-partners.jp/contents/91419.html#back)), however it is 240万円 (less if you calculate subsidies) for a Nissan Sakura which has 20kwh ([https://www3.nissan.co.jp/vehicles/new/sakura/specifications.html](https://www3.nissan.co.jp/vehicles/new/sakura/specifications.html)), albeit for the car you will also need a V2H which are not cheap but also have subsidies and could be considered an essential cost since gasoline vehicles are going to disappear.
In addition to the above, we found out that Nichicon’s V2H is not compatible with solar house battery systems and we ended splitting our solar panel system in two, smaller set for our house battery and a larger set for the car during power outages, during normal operation they work together well, but the solar figures are disjointed because of how they calculate usage/purchase/generation between each other.
Ultimately if I had two electric cars, the house battery would be an almost complete waste of money, however with only 1 electric car, it is useful for when we use the electric car.
One last note, be very aware of what peak electricity usage looks like for your household, our 6kwh (biggest commercial one at the time) one has a max output of 2kw, so if you use a heat pump systems in negative celsius conditions and an electric stove etc, you are gonna hit above 2kw (3kw or more depending on number of plates on the stove running) and you will end up purchasing electricity from the grid, an electric car has a max output of like 6kw so you are unlikely to exceed that.
I was thinking of batteries too to use more of the cheap nighttime electricity (I have all-electric house), instead, I ended up just starting the high-pull appliances and the car charger myself at 1AM. A lot cheaper than a battery because I would be up anyway 😉
Household electricity use is now 3/5ths after 1AM.
Ecoflow might have something on the cheaper side, under their solutions page.