What Size off-Grid Solar Kit Do I Need?
Designing an off-grid solar system can be complex. There are three factors to consider when sizing for off-grid solar:
- Your daily energy usage, which determines how many solar panels you need
- Your nightly energy usage, which determines the size of your battery bank
- Your peak power demand, which determines the sizing of your inverter
The most common off-grid system configurations range from 5kW to 21kW. However, energy usage varies for every household, so the best approach is to design a custom off-grid solar kit based on your specific energy usage patterns.
Reach out to our team of experienced off-grid solar designers who can provide a free design consultation and custom quote for your system.
What’s in Our off-Grid Solar System Packages?
Solar panels convert sunlight into electricity. The size of your solar panel array determines how much energy you can use at your off-grid property each day.
Our off-grid solar kits come with high-efficiency solar panels backed by a 25-year performance warranty.
An inverter converts DC power from your solar panels into AC power, the format used by most household appliances. Our string inverter kits include several solar panels wired into a central inverter unit.
Note that if you want to install a string inverter kit on your roof, you’ll need to add Rapid Shutdown Modules at an additional cost to comply with the NEC (National Electrical Code).
Your inverter size is based on your peak power requirements, the amount of electrical loads you want to run at the same time. If you need to run several power-hungry appliances simultaneously, you’ll need a larger inverter to cover your peak power demand.
If you need help determining your off-grid inverter size, contact us today.
Our off-grid solar kits come with IronRidge XR roof mount or ground mount racking materials. IronRidge racking materials are tested and proven to perform in extreme environments. Plus, their products are fully certified, code compliant and backed by a limited 20-year warranty.
IronRidge racking rails feature mounting holes that provide a quick and easy way to mount your solar panels. Their products are ideal DIY solar installations.
Our off-grid mount kits include roof mounts and flashings with a waterproof seal to secure your racking rails to the roof.
Ground mount kits require an additional metal support structure , not included with your off-grid kit. (Don’t worry, we’ll provide a shopping list with everything you need to complete the installation.)
Batteries store the energy you produce during the day, so you can draw power from your battery bank to run appliances when the sun isn’t shining. The size of your battery bank determines how much energy you need to use at night, or on overcast days where there’s not much sunlight available. Many off-grid residents add a gas generator to their off-grid solar systems as a backup energy source in the event that there are several cloudy days.
Off-grid solar systems use deep-cycle batteries, deep-cycle Lithium Iron Phosphate Technology (LifeP04) batteries which are designed to be discharged and recharged gradually. These are sized to cover your energy usage for one night, then recharge from solar during the day, completing one charge and discharge cycle over a 24-hour period.
There are two different types of batteries used for off-grid solar systems: lead-acid and lithium batteries. Lead-acid batteries have a shorter lifespan (about 5 years) and require regular maintenance while lithium batteries have a longer lifespan (about 10 years) and don’t require much maintenance. Today, nearly all off-grid customers today choose lithium batteries.
Building an off-Grid Solar System: More Resources
Here are some additional resources for designing and installing your off-grid solar system:
- Off-grid solar system design & installation guide: This extensive guide covers everything you need to know about off-grid solar. Learn how to size and design your system, choose the right components for your project, and get an accurate cost estimate for your off-grid solar package.
- Off-grid load evaluation worksheet: To size your off-grid solar system, you’ll need to know how much energy your appliances use on a daily basis. Use this handy load evaluation sheet to tally up your usage.
- Best battery types for solar storage: Compare the pros and cons of lead-acid and lithium batteries to see which battery chemistry works best for your off-grid solar system.
- Solar Resource Hub: New to solar? Learn the basics about going solar, including cost & ROI calculations, system design guidelines, and installation tips.
GoGreenSolar is run by experienced solar veterans, packaging solar kits since 2006. We're a local American-grown solar company based in Orange County, California, and our work has been featured on CBS, NBC, and USA Today.
We do more than ship you a box of parts. Our team provides expert support with installation, permitting, rebates, and interconnection. Everything we do is designed to make the process of going solar as quick, painless, and affordable as possible.
Our clients have saved thousands by ditching overpriced national installers and taking charge of their solar installation. Whether you hire a local installer or install your own solar panel kit, we're here to help you maximize your savings and make the process of going solar as painless as possible.