Camshawn
Senior Member
On standby generators, we always switched off the charger before disconnecting the battery. The arc from the charger can wipe out the newer electronics( from a few Cummins field service techs). I would imagine that welding could possibly cause problems with the electronic. It would be a prudent to spend 5 minutes disconnecting the battery as opposed to the time and cost of figuring out a problem if one occurs. Cam