We have gathered data on electricity used in our RV and have compiled a solar report to analyze the actual results. We still have issues of understanding what is going on, but overall we are thrilled. Yesterday was the true test and we did really well.
Data to follow.
Starting last spring we monitored battery use carefully so we could determine how much solar we needed to live without electric hookups and without running the generator. The answer was 600-700 watts of solar (700 installed) to recharge our 300amp (150 useable) batteries on a daily basis.
Starting at sunrise we used 96 amps. Left the solar off until 8 am, sunshine hit the panels at 7:45. Didn’t use any generator to find out when the solar could recover to 100% batteries. Started the evening with fully charged batteries reading at 13.05v. Used the inverter and heater during the test, thus creating lived in situation.
Everything worked as expected. We had high clouds in the morning. Bulk charge started the day a little handicapped by the high clouds. Achieved absorb mode at 11 am meaning most of the charge was delivered. Float mode started at 1 pm. Float for four hours. Ended the day with about 12.9v under a small load fully charged at sunset.
So my conclusion is that I could generate more in a day, and still hit 100% by the end of the day, but if I used more than about 120 amps I would need more panels or a suitcase I could point. I’m still only good for one night of use if I have sunshine the next day.
Here is the link to the long version of the RV solar report.
Link to our 2019 Route.
Link to our route San Diego to El Paso
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