15190P- I fully charged the house batteries and battery switched off for (1) month inside storage (no electricity available). The inverter is also switched off. I took it out today house batteries dead, wouldn't even start generator. After driving for about 1/2 hour there was enough charge to start generator. During this initial first 1/2 hour the battery gauge did NOT indicate the battery was charging. (After about a 1/2 hour the gauge did show it was charging and I was able to start the...
