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Canonman · 06-08-2019, 01:27 PM

Depends on how much amp draw you'd have in a given period of time.
We don't use CPAP but our 200w Zamp portable keep our batteries topped off just fine after an evenings use including the furnace.
200w is about the max size for portable units due to weight.
More panels = more amps you can push into your batteries but more than two panels and they are too cumbersome to handle and so are typically permanently mounted on the roof of the TT.

06-08-2019, 01:27 PM	#2
Canonman Senior Member Join Date: May 2016 Location: South Jordan, Utah Posts: 2,228	Depends on how much amp draw you'd have in a given period of time. We don't use CPAP but our 200w Zamp portable keep our batteries topped off just fine after an evenings use including the furnace. 200w is about the max size for portable units due to weight. More panels = more amps you can push into your batteries but more than two panels and they are too cumbersome to handle and so are typically permanently mounted on the roof of the TT. Attached Thumbnails __________________ 2017 Cougar 279RKSWE 2007.5 Dodge Ram 2500 6.7 Cummins Retirement Training Completed I think the little voices in my head have started a chat group.