I have a 2007 2720SL purchased from Custom RV in Anaheim. It was a good buying experience and I will also praise Matt. My trailer was delivered to me well prepped and dealing with Matt was a pleasure.
I considered the generator vs. solar issue and decided to have Custom RV install one 80 watt solar panel. I also upgraded the batteries to two 6 volt deep cycle. The combination has been working well for me. The 80 watt panel is not sufficient to refill the batteries on a daily basis (appears more like 150 watts of capacity would be needed for that) but the single 80 watt panel does insure that I have full batteries before every trip, and does extend the batteries significantly during camping.
I understand that slow charging provided by solar is easier on the batteries than the more vigorous charging provided by a generator so, with solar, the batteries may have a longer overall lifespan.
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