FoxESS Community - Owners & Installers Forum

Hi,
I have a recent PV install with 12 panels. Both the PV1 and PV2 inputs on the Fox ESS H1 inverter are connected, and on a sunny day (not many so far), the power indicates over 4.5kW (so the 450W panels seem to function).
But on the display panel, P1 shows a healthy voltage, but P2 shows zero (or very nearly).
I did a Google on this scenario, and one suggestion was that the PV config was set to "independent" - but I can't find this information again! The PV config for my H1 is set to independent.
I have the manual for the H1, but it doesn't go into any detail about the options listed in the function tree.
Thanks.

It sounds like your 12 panels have been wired as 1 string into PV1 and there’s nothing in PV2 - what panels do you have, and what voltage are you seeing on PV1 during the day?

Thanks.
The panels are JA Solar 450W units with an o/c voltage of 39.3v (so 12 would be a max of 471.6v). The inverter has a max input of 600v, so that does seem to be compatible.
I read that 1 string is typically more efficient than 2 (my roof has no shade except passing birds and the clouds).

It's just that I have conflicting and confusing answers from my installer. The system spec mentions two strings, and the 4-core cable to the roof is connected to both PV1 & PV2. So, where does PV2 go if the panels are 12 in series as 1 string?

I'll have to get back to you on what voltage is shown as soon as the sun comes out again. [unless the inverter has kept a log somewhere]

Grumps wrote: ↑Thu Feb 19, 2026 9:14 pm I'll have to get back to you on what voltage is shown as soon as the sun comes out again. [unless the inverter has kept a log somewhere]

Check this post viewtopic.php?p=13135#p13135
Now select your Inverter, and filter PV1 & PV2 Voltage