Thank you for your responses.. my question now is how to most effectively test the house batteries. If the house battery is full, the inverter is on, and I’m using no other source of power- how long should my batteries last if I’m only using a small oxygen concentrator and C-PAP machine?
The batteries seem to only last 1.5 - 2 hours max. That doesn’t seem right to me but I’m not sure. Please share your experience… thank you in advance !