Everything has been working great for months, a few weeks back I upgraded to 800ah lithium (2x400ah eg4-ll) and all still fine. Just a few minutes ago I plugged a pc printer in when not on shore and it blew the BMS. Even with quartro inverter in off mode it blows the BMS as soon as it plugs in. Not sure how troubleshoot but when hooked up to generator power it's not turning on (assuming it needs 12v to turn on)