Thor Forums

[gmc]

So this is what I am seeing in your posts and why I am scratching my head... if I misstate something, please correct - might point to problem...
- boondocking, and with genny off, no shore power- everything 12v works... tells me use/store is ok.
- engine alternator charges batteries telling me batteries are accepting charge and BIM is working (at least in that direction)
- inverter shows >13v on display when genny is running... telling me the genset is supplying power and converter output is ok.. and it is getting to batteries (the inverter only dc input is direct from batteries, so if it is seeing 13v, the batteries must be too... if there was a break between converter and batteries, I’d expect the inverter wouldn’t show 13v
- the BIM isn’t in play as far as charging coach from converter... It is only in play for emergency start, or cross charging (alternator to coach or converter to chassis)
Of course rule #1 for our RVs is they are all unique... so if one on the above is proven false - we might find problem...

In these states:
- engine off, genny off, use/store in use
- engine on, genny off, use/store in use
- engine off, genny on, use/store in use
Measure each of these voltages: (wait 2-3 min in each state before measuring... to allow BIM functions where needed...)
- at coach batteries
- at chassis battery
- at converter output
- at inverter input (use inverter display)

Some readings will be zero. Let’s see where the ‘disconnect’ is...