solar power for dry camping & cpap machine

BFL13 wrote:
I got solar, not to avoid using the generator so much, but because I could not get the batteries full enough with the generator in a reasonably short generator running time.

:h :h

The above I do not understand ... considering everything I keep reading in the forums about how well proper multi-stage chargers recharge RV batteries when those chargers are powered by shore power or generator power.

Our motorhome's 130 amp Ford engine alternator completely charges our RV's battery bank with only 3-5 hours of driving between destinations. How can an engine alternator charge better than a good multi-stage battery charger?

Back on topic: Both the DW and myself use unheated CPAP machines when we're camping not on hookups. Mine is powered via an external brick optional accessary from the CPAP manufacturer that I plug into a 12V receptacle next to my bed and the DW's unheated CPAP machine is powered via a 300 watt pure sine wave inverter that is plugged into a 12V receptacle in the RV. These two CPAP machines leave plenty of power remaining in the two 12V deep cycle RV batteries in the morning - even when we use the furnace during the night. My preference is to power unheated CPAP machines directly from 12 volts when used in an RV ... but those bricks that raise 12 volts DC up to 120 volts AC can be a bit expensive. Using a CPAP machine with it's heat mode turned on can be a whole different drycamping challenge.