One of the first physical decisions you will make is where to put the solar panels. While suburban homes typically default to roof mounting, off-grid properties often have more land and flexibility. The choice between mounting on your roof or on the ground impacts performance, maintenance, and safety.
For many remote systems, a ground mount offers significant advantages that are often overlooked. It frees you from the limitations of your roof’s orientation and pitch. A well-placed Off Grid Solar array is positioned for the sun, not just the architecture of the house.
The Case for Ground Mounts in Off Grid Solar
Ground mounts involve securing racks into the earth using concrete footings or pile-driven screws. This allows you to place the array in the perfect spot to avoid shade from trees or buildings.
Maintenance Ease for Off Grid Solar
Clearing snow off roof-mounted panels in winter is dangerous and difficult. With a ground mount, you can easily sweep off snow with a broom, ensuring your production returns immediately after a storm. This simple access also makes cleaning dust and pollen a breeze in the summer.
Cooling and Efficiency in Off Grid Solar
Solar panels lose efficiency as they get hotter. Roof-mounted panels often suffer from heat buildup because there is little airflow underneath them. Ground mounts have open air on all sides, keeping the panels cooler and producing more power on hot days.
Roof Mounting Considerations for Solar Off Grid
Roof mounting is still a valid choice if land is limited or if the ground is heavily shaded. It utilizes space that is otherwise “dead,” keeping your yard clear for other uses.
Protection and Security in Solar Off Grid
Panels on a roof are generally safer from theft, vandalism, or damage from wildlife and livestock. If you are in an area with large animals or security concerns, the roof offers a natural barrier. It also simplifies wiring if the battery room is directly inside the house.
Structural Integrity for Solar Off Grid
Before mounting on a roof, you must ensure the structure can handle the weight of the panels and snow load. Off-grid cabins are sometimes built with lighter framing that may need reinforcement. A ground mount eliminates this structural risk to your home.
Mounting Checklist for Solar Off Grid
Factors to weigh when deciding on racking.
- Snow Removal: Can you easily reach the panels to clean them?
- Orientation: Can the mount face true South (in Northern Hemisphere)?
- Tilt Angle: Is the angle adjustable for winter sun?
- Shading: Are there trees that will grow and block the view?
- Cable Distance: How far is the run to the inverter (voltage drop)?
- Cost: Ground mounts require more steel and concrete/labor.
- Space: Do you have a clear area of land available?
- Aesthetics: Do you want to see the panels from your porch?
- Wind Load: Is the racking rated for local wind speeds?
- Expansion: Is there room to add more panels later?
Conclusion: Positioning for Solar Off Grid Success
The placement of your panels dictates your energy harvest for the next 25 years. While roof mounts are convenient for space, ground mounts offer superior performance and maintainability. A flexible Solar Off Grid design takes advantage of your land to maximize sun exposure.
Consider the practicalities of winter and maintenance before bolting anything down. A system that is easy to care for is a system that will remain reliable for decades.