Question for knowledgeable solar experts

You have a tremendous drain. So either you have to much plugged in and on or your invertor is bad. Unplug everything from the invertor and get a battery meter and see if there is a drain. Turn on invertor and see if there is a drain with just that. Then slowly plug in each item until you find the source. Could be one of your appliances is bad like your CPAP machine could be pulling to much. You need to isolate and locate through elimination.