Off-Grid Solar for Camper or Garden House

Calculations

{"type":"doc","attrs":{"background":{"dim":11,"id":"aurora"}},"content":[{"type":"heading","attrs":{"level":1},"content":[{"type":"text","text":"Off-grid power for a camper or garden house"}]},{"type":"paragraph","content":[{"type":"text","text":"Add up your devices, then size the battery and the solar panel."}]},{"type":"paragraph","content":[{"type":"text","text":"Example values, replace them with the data sheets of your devices. Devices: power and hours per day"}]},{"type":"numbox","attrs":{"code":"fridge = 45 W * 8 h\nlights = 12 W * 5 h\nlaptop = 60 W * 4 h\nphones = 10 W * 3 h\npump = 40 W * 0.5 h"}},{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"Daily energy need"}]},{"type":"numbox","attrs":{"code":"dailyNeed = fridge + lights + laptop + phones + pump to Wh"}},{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"Battery"}]},{"type":"numbox","attrs":{"code":"systemVoltage = 12 V\ndaysWithoutSun = 2\nmaxDepth = 80 %\nbatteryEnergy = dailyNeed * daysWithoutSun / maxDepth to Wh\nbatteryCapacity = batteryEnergy / systemVoltage to Ah"}},{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"Solar panel"}]},{"type":"numbox","attrs":{"code":"sunHours = 3 h\nlosses = 25 %\npanelPower = dailyNeed / (sunHours * (1 - losses)) to W"}},{"type":"paragraph"}]}