Wall Mount all weather 280 Ah battery

Is the battery dead or does the LCD screen still turn on?

No display, no noise, no voltage at the terminals. I am going back there tomorrow to double check  and swap the battery com cable with a new one but i am not sure what else i can do. 

well…. The wall mount all weather battery still shows no sign of life after swapping the com cable with a new one. The battery is only a couple of months old and i have received no possible fix from neither Signature Solar who sold the equipment or from EG4 electronics… What can i do now? 

How long was the battery in standby? It’s possible the battery was maintaining the inverter on and gradually discharged over time.

Have you tried charging the battery at a very low amperage?

If you have a 48V battery charger or a Chargeverter (If you have one already), to recharge the battery at a low current (around 1A–5A).

If you dont have a charger, connect another 48vdc battery to it.  the bats dead and bms isnt getting enough power to turn on.  if you can get BMS to fire up you can then charge the battery normally.  Ive had to do this with many lithium batteries when they run down fully, solar, flashlights, car lithium batteries.  The bms manufacturers need to include button batteries on theyre circuit boards to run when the bats are dead.

Thanks for the answers. I will see if i can find a 48 Volt charger or another battery to try… i still do not understand how it would discharge just feeding the inverter when there were 8 solar panels on it…

Another question, please! I am going to get a Chargeverter to try and charge the battery: i am planning on adding a bus bar for the negative and positive and connect the battery, Chargeverter and 6000XP to it. Is that the correct way to do it?

@ravasunpower
Yes, that looks correct. You will connect the chargeverter and the batteries to the bus bars and then run the connection from the bus bars to the inverter.

thanks Eric, i am waiting on receiving the Chargeverter and hope that it will be enough to revive the non-responsive battery bms.

Hello again… i have received a Chargeverter: i disconnected the battery from the inverter completely and the inverter was off. I charged the battery directly with the Chargeverter for 2-1/2 hours.

Before charging, my multitester indicated 0 volts. The BMS display was off. While it was charging, i tested the battery connectors and was getting 54 volts and increasing. Chargeverter settings were 56 Volts and 50 Amps. After 2-1/2 hours, i disconnected the Chargeverter. The BMS display was still off and i watched the voltage at the battery connectors drop from 55 to 0 in a minute or so.

any idea what i can do now?

Try trickle charging the battery. Charge at a low amperage, about 1-5 amps. 

I have disconnected the battery from the inverter and am currently charging with generator and chargeverter with 1A. So far, no reaction from battery: voltage at the connectors shows 54V while charging but the display is still off. I will have the generator on for a few hours and will check again. Any idea how long i should be running the generator and inverter for before i know if the battery is toast?

You can change it to 5A after 2-3 hours. I would say let it charge for about 8-10 hours at 5A and if that doesn't help it, then you might need to get a replacement.