SolarEdge Home Battery 400V (BAT-10K1P)

By Daan Haket · researched and written with an AI assistant · updated 26 October 2026

The 400V battery’s DC power and efficiency are not a like-for-like comparison with an AC-coupled all-in-one system. The matching SolarEdge inverter and any backup interface are separate choices.

Research from manufacturer documents, not a hands-on test. Values and missing details are kept separate below.

What matters on your quote

Compare the complete installed system. The published peak round-trip figure is a DC-coupled claim; do not enter it as a measured whole-house AC efficiency.

• The continuous battery-output figure must not be mistaken for a guaranteed AC rating at your meter.

At a glance

Not in the documents we checked so far: warranty throughput / cycles, capacity at end of warranty, UK list price.

Ask the installer before you sign

• Is the usable capacity on the quote the figure above, or a nominal one?
• Can it charge fast enough to fill in your cheap window? Charging power × hours of the window is the most it can take in.
• Is any equipment needed for backup in a power cut included in the price?
• Does it work alongside your current solar inverter, or replace it?
• Which warranty conditions apply in the UK, and what do you have to do to keep them?

Will it pay back for you?

Try it in the calculator →

Opens the calculator with this battery’s usable capacity filled in. Add your own installed price and tariff. If the datasheet does not state a round-trip efficiency, use your installer’s figure.