Irocmaster

Thanks for the kind words Brain.

Nasty people on this forums I see. O well not interested any more.

Yes true they can gas very bad if hot. Remember the picks of the exploded house. Yes they need good ventilation.

Cheap alternative is what I said not that lead acid is better than lithium. The flooded calcium batteries handle higher temp better than AGM batteries. (What I should have said.)

Your inverter need to be repaired if your batteries are still fine.

As you describe the alarm that is normal 4 beeps silence the unit is in battery mode, 4 beeps in one second continues is battery over volt.

See the address settings are all the same on batteries.

Restart your inverter

If you're panels are on the same direction and angle you do not need any diods. Diods on the panels are for reverse protection.

Pouvez-vous m'en dire plus sur le système complet, le nombre de panneaux photovoltaïques et le type de batteries.

You can check this post.

I agree with Scorp your batteries are shot. Your settings for gel batteries is a bid high. The spec voltage on the batteries is @25 degrees. Voltage and charge rate must be lower at higher ambient temps in summer.

Repaired on last week, with no load on battery only the display showed around 100va X3 if remembered correctly. how ever it only draw 2.9A from the 48v power supply. That is +/_ 140W idle. I noticed that on very low on no load most inverters do not measure current very accurate.

Do you have the batterie BMS connected to the Inverter?