Off Grid Solar

Our off grid solar power system kits contain everything you need to set up a standalone solar energy system with battery storage for around-the-clock off-grid solar power: solar panels, deep-cycle solar batteries, an inverter/charger, charge control, breakers, boxes, and more. Save time and money by buying your entire off-grid solar power system at once with our custom-designed kits.

These off-grid solar system kits are great for mid-sized off-grid homes or remote cabins. Check out our videos below for help determining what size kit you need and how to do a DIY installation.

Whether on or off the grid, using solar panels (also called solar PV panels, PV panels, or PV modules) is one of the simplest and cleanest ways to convert the sun's energy into electricity. Solar panels are clean, quiet, direct, and incredibly durable, with a maintenance-free lifespan of decades. And solar has declined in price by more than half in just the last 10 years.

Real Goods' legacy is directly linked to the practicality and reliability of off-grid solar panels - we sold the first off-grid solar panel in the U.S., after all. But we've also built solar PV systems for thousands of customers across the country since 1978, and most are still going strong decades later.

Solar batteries are the heart of every off-grid solar power system. While the solar panels generate the electricity, they do it intermittently; it's the solar batteries that provide the consistency needed for comfortable off-grid living around the clock. Solar batteries are also called "deep cycle batteries" for their ability to handle long, frequent, deep charge/discharge cycles. Deep cycle batteries can be used in other renewable energy applications like wind and hydro power systems as well.

In an off-grid system, everything comes and goes from the battery bank, so your solar batteries will be working hard. You can help protect deep cycle batteries by regulating their charge with a charge controller and keeping tabs on them with a battery monitor. All batteries' capacity to store and deliver energy wears down over time, but there are significant differences between the different types of solar batteries, how deeply they can cycle, and how long they can be expected to last - see below for a comparison.

Every battery-based renewable energy system requires charge control. A charge controller brings your batteries to optimum charge level by monitoring voltage and limiting battery current as appropriate. For solar arrays over 200 Watts, an MPPT charge controller is almost always more economical when the power system is considered as a whole.

With wind or hydro power sources, an additional PWM type controller is often used in addition to the MPPT. The MPPT (Maximum Power Point Tracking) operates the solar array at its best possible performance, while a PWM can be configured to divert excess power to a diversion load – water and air heating elements.

Temperature compensation is important – voltage requirements for batteries are different at different temperatures. To prevent overcharging in the summer and undercharging in the winter, use temperature compensation probes whenever possible, and if not available, adjust the charge controller's charge voltage setpoints appropriately.

Whether in an emergency situation or during some off-grid fun like camping or road tripping, access to at least some electricity is as close to a necessity as you can get without being a biological requirement. Keeping a cell phone, GPS, or radio, or flashlight alive can easily be the difference between life and death - or the difference between a great backpacking trip and an endurance test.

To keep those gadgets charged, you need some portable power. We offer portable charging via solar, USB, 12-volt DC (think car cigarette lighter), and rechargeable household batteries. Solar is typically the most versatile option since it requires no extra equipment to provide the charge, but whenever possible, it’s a good idea to carry another portable power option as well.

Overcurrent protection isn't just part of electric code compliance - it's common sense.

The National Electrical Code (NEC) requires "overcurrent protection and a disconnect means" between any power source and any appliance.