This is even easier if you have a smart meter installed; you should be able to see your daily usage either on the bill or by checking you… TOTAL: How Much Solar Power Do I need? Using the above example of 170Ah, it needs to produce 28.45 Amps per hour for 6 hours. I wanted to see how long it would take for my solar panel system batteries to bottom out (50% discharge). Your solar panels should be sized to recharge your batteries. You multiply the combined wattage of the solar panels by the number of hours sunlight they will receive per day. Cost vs value of additional kWs. Now that you have filled in ALL the blanks with the electrical items you anticipate using throughout your normal day, check out ‘Table 1.6’. Key Takeaway: Estimate 200 watts of solar panels per 100 amp hours of useable battery capacity (100Ah Lithium or 200Ah AGM). Fill this form out and we can book a call, and get you a ballpark quote. Solar panels take the energy from the sun and send it down through a charge controller where it will eventually recharge the batteries in your Camper Electrical system. 1200 watts divided by 1,000 equals 1.2 kwh produced per day. Key Takeaway #2: If you want more battery capacity than you have roof space for solar panels, that’s fine! If you have a 75-watt panel and 5 hours of sun per day, you would produce 375 watts per day per panel. It does not take a solar installation team much longer to install a 5kW system than it does a 3kW system. To get an idea of how many batteries you need, all you need to do is figure out how much energy you use within this time-frame and find a … You will need a larger inverter and more panels, but the additional cost of these added components is relatively cheaper. So, 240 Watts of solar panels should, in theory, fully charge your batteries each day and accommodate your power consumption. 4 hours. This calculator is meant for camper van conversions, RVs and small off-grid solar systems. Unless you’re running a blender or a hair dryer in your van (and maybe even then), you probably don’t need as much power stocked up as you think, especially if you’re going solar. Except that it never works that way. 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. Ben says:True, DC appliances are cheaply made, but expensive to buy…so get an inverter. Fill out the calculator below to find out how many solar panels you need for your DIY solar panel system. Appliances should state in their owner’s manual and often on a label somewhere how much power they use on average. Image copyright GoPower Electric gpelectric.com. Depending where you are for the winter, they might happen a lot. This is great if you just need to charge small gear, like phones, cameras, your roof fan, and other small accessories to keep you comfortable while camping. How much solar charging do you need? Fill out the calculator below to find out how many solar panels you need for your DIY solar panel system. This project requires a decent amount of measuring and lining up which can be time consuming. 120 total true usable amps from both batteries / 4 days before our batteries were drained = 30 amp hours per day average need So I would have a 100w, a 175w and another 175w.. Will that work? Quick note before we get started. 160 total amps available x.75 capacity = 120 total true usable amps from both batteries. Watch the video below if you’re not sure how to fill out the calculator. Paved To Pines is a campervan conversion company based out of Saskatchewan, Canada. This automatic shut off on the solar panel system prevents damage to the batteries by discharging too deep. 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