ME3000SP and Amass E1402-75k9k9

[uax6]

I had a failure on my ME3000SP, to which I have two sets of E1402-75K9K9 battery sets. The failure took the batteries down to 35Volts. I've now fitted a new ME3000SP, but the battery sets are alarming (causing the ME3000Sp to show alarms ID85 and ID103), and the ME3000SP won't charge the battery sets (It's sitting in 'stand-by').
Is there a way to get it to charge the batteries (which presumably are sending some sort of CAMBUS instruction to disable charging?), the AMASS paperwork is crap in regards to anything other than screwing them to the wall, and the ME3000SP manual doesn't tell you how to get round the problems, just tells you what they are!

Thanks
Andy G

[Joeboy]

Welcome to the forum. First thing that springs to mind in a generic fashion as I don't know the gear is to buy a 48Vdc charger and get them up to operating voltage before plugging them back into the inverter.

Although they might be dead as 35Vdc is beyond brutal if the system is 48Vdc. Hopefully not though

See chart.



Depending on the system age you might be able to try a warranty claim against the inverter supplier?

[uax6]

Well, as the inverter has been replaced under warrenty, there might be a chance that the battery sets will be too, but knowing the run of luck I've been having its probably going to be down to me to buy new ones.
If thats the case I'll take the covers off and see whats inside and maybe just replace the cells themselves.
Fingers crossed that Sofar Solar will come up trumps....

Andy G

[Joeboy]

Well, as the inverter has been replaced under warrenty, there might be a chance that the battery sets will be too, but knowing the run of luck I've been having its probably going to be down to me to buy new ones.
If thats the case I'll take the covers off and see whats inside and maybe just replace the cells themselves.
Fingers crossed that Sofar Solar will come up trumps....

Andy G

The battery pack might have internal protection and a charge will get you going again. The chargers aren't cheap but I can't think of another way to get around the inverters settings. Someone may be along soon who knows more.

https://www.fogstar.co.uk/products/life ... SiEALw_wcB

First one that came up on a search. Maybe the original supplier can send you one to get going?

[nowty]

The batteries may well be in a failsafe mode and the batteries may need to be opened up and manually charged to a minimum level to get them working again. This was a common issue with older Growatt batteries.

I would try and get help from the manufactory or supplier of them in the first instance.

[jonc_uk]

A dual bench power supply with current limiting which has 2 x 30V outputs can be put in series to give the required voltage. You would set a maximum voltage and a suitable current limit for charging.

Something like this: https://www.ebay.co.uk/itm/204997854271

[Marcus]

Not familiar with those batteries, but i have sucsessfully recovered pylontechs that were down to 17v. At that voltage the bms doesn't function so i opened them up and charged slowly (the cells are not clamped with the lid off) with a bench psu until about 36v when i could get the bms to work and charged them faster with the lids back on.

[chris_n]

I think I would be tempted to try a low current 36V ebike charger, which is actually a 42V supply. It would bring the battery fairly safely up to a level where the battery safely system would allow correct charging to commence with less likelihood of a single group of cells going overvoltage. I would of course do this outside as bypassing the BMS invalidates the safety features built into the battery.