Quick Answer
To calculate the cost-effectiveness of solar for your RV, divide the system's upfront cost by the total number of years the system will last, then compare it to the estimated cost of using alternative energy sources, such as gas generators or shore power.
Estimating System Costs
To start, gather quotes from reputable solar panel manufacturers, such as Renogy, Goal Zero, or Outback Power, for the number of panels you’ll need to meet your power requirements. Consider a minimum of 200 watts of power to charge your batteries and run essential appliances, like lights, a water pump, and a small refrigerator. For example, a 200-watt system might cost between $400-$600, depending on the quality and brand of the panels.
Calculating System Lifespan
The lifespan of a solar panel system can range from 20-30 years, depending on the quality of the panels and the environment in which they’re used. A well-maintained system with high-quality panels can last for 25 years or more. When calculating the cost-effectiveness of the system, use this lifespan to determine the total system cost over its lifetime. For a $400-$600 system, the cost per year would be approximately $16-$24.
Assessing Energy Savings
To calculate the energy savings of your solar system, track your energy usage over a period of time. Using a wattmeter or a data logger like the Victron SmartSolar, monitor your system’s performance and identify areas where energy is being wasted. This information will help you make informed decisions about which appliances to keep or replace, and how to optimize your system’s energy output. By doing so, you can reduce your energy consumption and increase the cost-effectiveness of your solar system.
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