There is no point in having Harbor Fright solar panels if you don't know how many you need. If you don't know what you want to run on your solar panel/battery bank and you don't know how many watts it will take you will probably be in for a really big disappointment when you go to power your full size side-by-side refrigerator/freezer and window air conditioner. One Harbor Freight Solar Panel Kit produces 45 watts/hr. Five hours of full sun is the amount used as the standard in calculating how much power you can generate. 5 hrs x 45 watts = 225 watts (total power for 24 hours.) With line loss and DC to AC power loss that isn't enough wattage to run two 100 watt bulbs for two hours. Use a Kill-A-Watt meter to measure the watts used in 24 hours for each appliance, then add up the usage. Then you know how many Harbor Freight solar panel kits you will needs. Then you need the batteries to store the power. Kill-A-Watt on Amazon: www.amazon.com
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