Check prices here.
SunElec.comYou might find that driving a long ways to get a lower price panel might be expensive on gas! That website is in Phoenix AZ.
I would prefer to recommend a pair of 140 watt panels that they sell for $229 each. They are 12 volt nominal, so will work well with a cheap PWM controller if you like. I bought one for about $14 at
AilExpress.com Search for 20A PWM controller and then click on lowest price first. You will get several results, and it will show up in about 3-4 weeks.
Until you get a controller, you can directly hook up a 140 watt solar panel to your battery, and the CO meter, propane detector, and refrigerator will discharge the battery enough that the solar panel will not be able to overcharge the battery. Just make sure that you are not using the solar and battery charger at the same time. If you start with a full battery, then charge it all day, it will certainly overcharge it! You can just hook up a switch or unplug it while not needing the power!
I am planning on installing a 120 watt solar panel and PWM controller on the handicap van I am buying. I will not be using it daily, or perhaps weekly, and want to keep the battery full. I also plan on installing a fantastic fan to keep the van cool while parked in the sun.
Good luck,
Fred.
