RV Solar Calculator for Off Grid Living
This RV solar calculator will help you correctly size your entire camper solar system. It includes your inverter, solar panels, solar charge controller and battery bank too.
The most accurate method of determining how much solar you need is actually to monitor/measure your RV's power usage. 12V DC Power Usage For 12V DC power usage, you can install a battery monitor. It should give you accurate readouts for the amount of power you use during a day or a camping trip.
A 300 amp-hour camper battery, for instance, would need around 300 watts of solar power. Also keep in mind that solar panels experience a 75-90% drop in efficiency on cloudy days, so it's good to have slightly more than you need when it comes to solar power (about a 20% cushion, if possible, to account for less-than-ideal conditions).
You'll also want to consider how many square feet of interior space you've got in your RV, where you tend to travel, and more. Let's take a quick look at some of the things you'll want to consider when planning your RV's solar power system.
Use this solar calculator to size your campervan or RV camper solar setup. If your device doesn't specify watts, use the watt calculator to convert amps and volts. List each device - every electrical component - its usage in watts, maximum number of hours used each day & if it's an AC or DC model.
PDF version includes complete article with source references.
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