I'm currently experiencing a generator charging problem when trying to charge my bank. My husband and I are new to solar power, but have been able to successfully wire 4 trojan t-105 batteries to our Prosine 2.0 (2000 watt) inverter/charger. The inverter works correctly with the bank and we are able to get power out of the bank. We have a Honda eu2000i (2000 watt) generator and are trying to use it to charge the bank. To do so, we bought a 12 gage extension cord, connected it to the AC input wiring on the inverter, set the generator's eco-mode to off, and turned it on. After a couple of seconds the prosine switched from inverter mode to charger mode and appeared to be charging successfully. AC input system diagnostics during this process were 122-123V, 11-12amp, 60Hz. However, after about 5-8 minutes the generator began to sound labored (ramping up, then down) and the V began to fluxuate, down to 112, then back up to 122, down, up, until the inverter came out of charge mode. After another few seconds, the entire process would repeat (charge mode turns on, gen ramps up slightly, charges a while, voltage fluxuates, charge mode stops). At no point however, did the generator sound like it was maxed out (like when we run our saw or other power tools off it). No lights on the generator indicated that it was maxed out either. In the manual, it says that continuous power from the generator should not exceed 1600 watts, yet from the stats given by the interver, this isn't happening. Am not sure how to proceed with solving this problem. Any advice would be helpful. Thanks!