I don't use my troller very much but went to use it last week and it was acting funny. It's like it only had 50% battery even though I charged them before going out. When that was happening I plugged up the powermax and the genny started working harder, but still no more power from the troller. It wasn't really acting like the board was going bad either(aka it wasn't jumping on and off). Thought it might be the batts so I charged them all week and pulled them off the charger this morning. Both are still reading 12.9V 12 hours later. Also ran the troller in the yard and it seemed to be running WOT now. I'm perplexed.