30 degree household energy storage battery

How are batteries rated?

Batteries are rated for two different capacity metrics: total and usable. Because usable capacity is most relevant to the amount of energy you'll get from a battery, we like to use usable capacity as the main "capacity" metric to compare storage products. Also, from our energy storage glossary, see how the two terms differ below:

How much usable capacity can you get with three stacked batteries?

Stack three batteries together for 9 kWh of usable capacity – ideal for Solar self-consumption and light backup – and then add up to three more per cabinet as your storage needs increase. Plus, you gotta love the 96.5% roundtrip efficiency!

How many batteries can you stack in a cabinet?

You can stack up to six batteries together in a cabinet. Each battery provides 3 kWh of usable capacity, making it ideal for solar self-consumption and light backup. The batteries also offer 96.5% roundtrip efficiency.

Can solar power be stored in a battery?

Yes, solar power can be stored in a battery. Existing solar systems typically have solar inverters which change the DC power produced by panels to AC power. However, to store that AC power in a battery, it needs to be inverted again to DC power.

What is battery capacity?

When manufacturers or installers talk about battery capacity (or energy capacity), they usually talk about one of two metrics a battery is rated on: total capacity and usable capacity. We'll get into why those are different further down. For the time being, it's all just "capacity."

Which solar battery has the most capacity?

Eguana, Electriq Power, and sonnen currently make the home batteries with the most capacity. Battery capacity can be a misleading metric: in many cases, you can stack multiple batteries together to make a larger system. Compare solar-plus-storage quotes from local installers on EnergySage. What is battery capacity? How is it measured?