A 130 watt solar panel will give you about 500 watt-hours per day i.e. annual daily average. That's about 15 KWH per month. If you have a two KWH battery bank and double its' capacity you will have a four KWH bank. Adding another 130 watt panel will increase your monthly output to 30 KWH. Clearly adding solar panels is far more effective than increasing the size of your battery bank. So why is there so much obsession with batteries when the real power comes from the panels. Thanks.
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Posted by: sstuller@netzero.com
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