Whether you’re committed to downsizing your energy footprint, are interested in renewable energy, or simply want to break off the relationship with your electric utility company, there are many small-scale solar system solutions available for your tiny home or RV.
How Much Solar Power Do I Need?
Determine how much power you typically use–looking at the total for a year will be useful so that you have an average since it can fluctuate seasonally. To make this calculation, review past energy bills, which typically show your monthly usage. You could also use an energy monitor, which connects to your meter and calculates your power usage. Consider outlet versions, which are particularly useful if you want to have data on a specific device (I like to use this method when upgrading to a more energy-efficient appliance). If these aren’t available to you, or you’re trying to make calculations based on a theoretical system where you don’t already live, online calculators and appliance charts are readily available.
How to Calculate Hours of Sun
Calculate the expected hours of sun by referencing solar charts for your current location or expected locations if traveling in your RV. If you’re unable to find a solar chart for your intended location, the weather station typically notes when the UV index is high enough that sunblock is recommended–in a pinch, this is a pretty good measure of direct sunlight.
How Many Solar Panels Do I Need to Install?
When determining how many solar panels you need, consider your energy consumption, solar hours, and the efficiency of your panels. 10–15 panels will likely be needed if you are using solely solar power. If you are planning to travel and will need to transport and set up the panels, you might want to consider a hybrid solution so that you don’t run out of power as you travel through cloudier climates or when you aren’t stopped long enough to set up and collect adequate sunlight. You’ll want to consider the weight of your panels and batteries, as well as storage and transportation systems required.
Modernize Home Services’ new solar panel calculator can help you learn more about how many panels are best for your needs.
Storing Solar Power
Deciding how to store your solar power will depend on whether you are mobile or not. If you’re in a permanent location, hiring an electrician to get you set up with a controller, inverter, and battery system will be the most efficient way to use your solar power.
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If you’re going to be mobile, you will want to consider other energy storage options, such as the BioLite Base Charge 1500, which collect energy directly from your compatible solar panels and allow you to plug in directly to the battery. Solar generators also typically allow you to supplement with electrical input from an outlet when necessary.
If the upfront cost of making solar power is daunting but you’d like to harness the sun’s energy, change some of your devices to solar power. There are solar phone chargers, speakers, watches, and backpacks. These are great because the panel and battery combine so it’s easy to plug in and lower your dependence on electricity from a utility company.
How Much Does It Cost to Go Solar?
Solar panels vary in cost and come in many sizes. Estimating a dollar per watt is a good place to start. Remember that the wattage is based on ideal conditions. Charge controllers will cost you $100–200. Inverters run from about $400–$800, depending on Amps. Combination devices and kits are available at price points ranging from $1,500 to $20,000. Batteries cost $300-$500 each.
If you’re hiring someone for installation, the rate will differ depending on the size and complexity of the system. When it comes to installation, there’s more than the classic rooftop model. Consider pole-mounted, ground-mounted, and wall-mounted awning-style options. Contact an installation company directly for quotes.
While the cost of small-scale solar may sound expensive, powering your tiny home with sustainable energy like solar power has the potential to pay for itself pretty quickly, especially when you consider the tax credits and kickbacks. Keep in mind that you ‘ll have some maintenance responsibilities that you should budget for.
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Frequently Asked Questions
How many solar panels do you need to run a tiny house?
It all depends on your energy consumption versus the efficiency of your panels and hours of sunlight. 10-15 solar panels can comfortably run a tiny house or RV, but you may be able to use fewer with proper panel placement and careful consumption of electricity. Consider which appliances may be able to use alternative energy sources (such as a propane stove or heater).
Can you run an RV completely on solar power?
While it is possible to run an RV completely on solar power, you’ll likely need to be park in one place with several semi-permanent solar panels. If you’re hoping to use the roof-mounted solar panels for RVs alone, you’ll need some supplemental power, especially if you’re going to be mobile.
