Need help diagnosing and replacing the BMS in 48v 160 ah RoyPow

[chrishouse]

I need help diagnosing and where to find a replacement BMS for the non-working RoyPow 48v160ah, model S51160, battery shown in the attached pics. I prefer a plug-n-play BMS, but realize that probably will not happen and I am comfortable and capable of DIY wiring if needed.

Batt has no power at the outside terminals.

Internally, measured before the contactor I am getting 53.25v.

When I press the power button the contactor clicks on, briefly has continuity through it and then clicks off and immediately releases giving no continuity.

I assume this means a bad BMS?

Any suggestions on a replacement? It is rated 160 amps Continuous, 315 amps for 30 seconds

 

[OzSolar]

A few possibly dumb questions just in case you hadn't already gotten there:

-Maybe the BMS is just fine but is turned off for a reason. Clear that error and you're back in business.

-Have you tried to jump start the battery with a power supply? When some BMS's goes into an error mode they can can only be restarted with a power supply. You really should have one if you don't already.

-I assume you've checked that the fuse isn't blown?

Perhaps my bumping this post will get you some useful responses.