Thanks for your reply. I believe I resolved the issue last night and it was a combination of things. It's possible the Store/Use button was set to Store by accident and the Emergency Start button was also pressed by accident causing all batteries to drain. We just purchased this unit and we were doing a deep clean. I pressed Use and the 50 AMP reset button in the Power Control Box then charged the battery and hooked up shore power again. Seems okay now. Thanks for your reply,