Hello,
I am new to the forum and I recently build a PV system.
It has two inverters in parallel (single phase) SPF 5000 ES with firmware 040 05 701; 041 05 701. Batteries 4xSLA 12V / 24Ah (They are small only to support parallel operation).
I have the following issue. When there isn't enough...
You are right. Basically they cannot charge from grid until PV energy is not totally gone. Until that happens they power themselves from batteries.
Finally I ended up constructing external power supply. With toroidal transformer and current limited voltage regulator, set to 54V. That solved my...
I tried today with 7A. It is still the same. It doesn't charge as I think it is supposed to. This two pictures are taken in the morning:
And finally in the afternoon, the inverters totally drained the batteries :(
After sunset they started charging. And Warning 04 is gone.
Hello,
I also have two inverters in parallel (single phase) SPF 5000 ES with firmware 040 05 701; 041 05 701. Batteries 4xSLA 12V / 24Ah (They are small only to support parallel operation).
I also have the same issue. When there isn't enough power from PV modules, the batteries are not charging...
But I think inverters are on bypass on all 3 pictures. The line just on top of the inverter icon on the display says bypass. In the end if it is not some firmware problem, I think I will have to use external power supply (charger) or batteries will die very soon.
I also measure similar values with clamp, but I think we are measuring Apparent power [VA], not Real power [W]. May be some filters in SPF 5000 ES input are causing this reactive energy go back and forth. If a Watt meter is used, may be the readings will be as others say, around 60W.
I have the same 2 inverters in parallel, 1 phase. I also had this problem and posted here in another thread: https://diysolarforum.com/threads/growatt-spf-5000-es-strange-charge-behavior.52469/. I did a lot of testing and nothing helped, that is how they work. To solve the problem, I made...