Hi there, I am finding that with PV2 connected I am getting a voltage of approximately 50% of the input on the PV1 ports on the inverter. Then if I connect the second string as well (PV1 connecters) - the power being produced by PV2 string is halved. (Current drop not voltage) - and Vise Versa - Any suggestions ?

Edited November 17, 20223 yr by Rosh
Additional info

On 2022/11/17 at 5:24 PM, Rosh said:

Then if I connect the second string as well (PV1 connecters) - the power being produced by PV2 string is halved.

If there is nowhere to go for extra PV power (e.g. the battery is (nearly) full and the load is light or you are in battery mode), then this is expected behaviour.

On 2022/11/17 at 5:24 PM, Rosh said:

I am finding that with PV2 connected I am getting a voltage of approximately 50% of the input on the PV1 ports on the inverter.

I assume that this is with nothing connected to the PV1 inputs, except perhaps a multimeter. This could be bus voltage leaking back into the PV input. I would not be too concerned about this.

Thanks @Coulomb - Still is this the reason for Halved input from Pv2 when it is connected

ie: assume PV1 is producing 400w and pv2 the same when both are connected - the PV1 shows a drop in power and Pv2 will be around 100W

 

Edited November 20, 20223 yr by Rosh
Additional info

7 hours ago, Rosh said:

Still is this the reason for Halved input from Pv2 when it is connected

It depends on whether there is a relatively fixed need for PV power.

If you only need 400 W, and PV1 is providing it all, then if you connect PV2 and it supplies 100 W, then PV1 will drop to around 300 W as there is nowhere else for the power to go.

But if you have a 2000 W load, in a mode where PV power can support the load, then when  PV1 is supplying 400 W and you connect PV2, I would not expect PV1 power to decrease.