I have a 400. I dry camp about 50& of the time and so far the 400 has has worked great. I don't run my AC's, heat pump or fireplace while dry camping. I top off the batteries just before I go to bed for about 20 minuets. Shut off the inverter at night and the batteries are fine in the morning. Not sure why I'd need more panels.
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Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
