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Solar panel for 12v battery11/24/2023 Of course, in reality there will be some losses of energy generated by the solar panel, mainly in the solar charge controller and cables, but also due to battery self-discharge. If we have a 50W solar panel on the roof of your motorhome, it will generate approximately 50W*5 = 250W/h (watt-hours) - this is almost in line with the average daily power consumption 210W/h. The average daily power generated by your motorhome solar panel should be equal or more than the average daily power consumption of your appliances.įor example, let's assume that on a typical day we can expect 5 hours of sunshine. Once this estimate is available, it's very easy to decide on the size of 12 volt solar panel required for your caravan or motorhome. 1 x 20W 12V water pump, used not more than 30min a dayīased on the above, the average daily power consumption will be 4*10W*3 + 40W*2 + 20W/2 = 210W/h (watt-hours) 4 x 10W 12V energy saving LED lights, used 3 hours a day The average daily power consumption can be estimated individually for each device (type of load) and added together to create an overall requirement. In order to choose a motorhome solar panel, you need to know how much energy your appliances use each day in a 24 hour period. Capacity of your batteries (less important).Your average daily power consumption (very important). ![]() Solar panels for caravans, motorhomes and boats can all be very different.Īs a rule of thumb, there are two factors which need to be considered when deciding on the solar panel size you require: Unfortunately, based on our experience, there's no single right answer to this question. Our customers always ask us about the right size of solar panel to charge 12V leisure batteries in vehicles and boats. How to Choose the Right 12V Solar Panel for Your Caravan, Motorhome or Boat 12V Leisure Battery
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