FoxESS Community - Owners & Installers Forum

Hi all
I am looking to add a battery to my current set up.
The battery I have is a Fox EP5 and I have two questions
Q1) As I have a 5kw battery can I only add other 5kw batteries? So if I wanted an additional 10kw I would need to add two 5kw batteries.

Q2) Is it true that I can only add another EP5 or can I add any make/brand?

Thanks in advance

The compatibility list is here
https://fox-ess.tech/ep-battery-expansi ... ion-types/

Thank You

But if an installer was to offer me a different branded 5kw battery would it work with the Fox EP5?

gxaxrxy2025 wrote: ↑Thu Apr 30, 2026 9:30 pm But if an installer was to offer me a different branded 5kw battery would it work with the Fox EP5?

I would not do that at all, and you would invalidate your warranty... assuming you don't create a fire
Stick with the Fox kit.

Will do

Thanks

You will need to use 'Fox ESS EP Junction Box' of course to wire up 2 or more batteries, best of luck with the upgrade.