Service manual and battery replacement

System MUST be turned on when reattaching new batteries or you will blow a battery board. Outside of that it is a lot of work but straightforward. The active components that measure charge act as a load to measure the charge, and if not energized acts as a very expensive fuse.

They were supplied with two different models of exposure batteries, Lead Crystal or Lead Acid.  If they are lead acid you can get them from several suppliers. If they are Lead Crystal we can provide them,  30 required. Drive batteries are also easily available.