How Many Watt Solar Panel Do I Need For My Caravan

If a 100w caravan solar panel produces approximately 4 5a per hour in bright sunshine.

How many watt solar panel do i need for my caravan. To work out the size of the panel we need we simply take the 28 45 x 18v average voltage of a solar panel 512w. When roof size is limited efficient panels with a high wattage can make the system more compact. Running additional electrical devices such as microwaves and laptops will add further strain. A battery holds about 100ah x 12 8 volts 1280 watts of power roughly.

Wattage rating x hours of daylight sunshine total watts per day. For our specific power demands we need one 100 watt portable solar panel to recharge our rv batteries during our boondocking camping trips under normal conditions. Therefore you will need to choose a solar panel which can provide 55ah of power per day. How many watts of solar panels do i need to recharge my batteries.

Our final personal determination. Now as i said before this is a high power example more typical of a large offgrid caravan or motorhome but the approach is the same. For any given energy production target you need fewer panels if their individual wattage is higher. Using the above example of 170ah it needs to produce 28 45 amps per hour for 6 hours.

As battery capacity is measured in a h amp hours you need to know the solar panel current to estimate how quickly it will charge your battery for example. Battery capacity amp hours energy watt hours voltage volts as an example if you have an 110ah amp hours battery and it has lasted for two days on your trip you need an average of 55ah per day. From here we can determine that two of these 100 watt panels would give us about 65 16 amp hours a day which covers our requirement of 50 amp hours. Our two 100 watt solar panels equal 200 watts together which also checks out with our guideline of matching our battery amp hours with our solar panel wattage.

Panel specifications the power rating of panels varies depending on the model and manufacturer but most range from 250 watts to 330 watts. Size of panel required panels have a rating in watts typically 5 200w or higher. If you have a 200a h battery this will take approximately.