The panels get most of the attention. What holds them up determines whether the array stays level after fifteen winters. Ground-mounted arrays carry wind, snow, and frost loads straight into the soil, making the structure underneath a design question in its own right rather than an afterthought once the modules are ordered.
Ground Mount Solar Racking in Canada and What the Structure Has to Handle
A roof already has a frame. Open ground does not, so ground-mount solar racking in Canada must be engineered for the site it stands on. Steel or aluminum rails sit on posts, and those posts transfer every load into the ground. Soil type, water table depth and exposure to prevailing wind all change what the foundation needs to be.
Off-Grid Solar Systems in Ontario and Why Ground Mounts Suit Them
Remote builds often favour open ground over rooftops. Off-grid solar systems in Ontario tend to serve cabins, camps and rural homes where the building is small, the roof faces the wrong way, or trees shade it through the afternoon. A ground array can sit in the clearest part of the lot, tilt steeply for winter sun, and be reached without a ladder to clear snow.
Frost Depth and Post Foundations
Soil that freezes and thaws moves. Frost heave lifts shallow posts over repeated winters, racking the frame out of alignment and loosening connections. For that reason, foundations for driven piles, ground screws, or concrete piers are set below the local frost line, and the required depth varies across the province. A geotechnical check answers the question better than a neighbour’s rule of thumb.
Snow Loading on Tilted Arrays
Structural design follows the ground snow load values published for each location in the National Building Code, adjusted for the array’s tilt and height. Steeper angles shed accumulation faster. Lower rails let drifts build up against the modules. Most installers in snow country set the bottom edge higher than a southern design would, and that clearance matters by March.
Points worth raising with an installer before the structure is quoted:
- Soil report or test pit results for the exact array location
- Post foundation type and the embedment depth used in the design
- Tilt angle chosen for winter production against summer production
- Ground clearance under the lowest module row for snow accumulation
- Stamped engineering drawings where the local building department requires them
- Trench route and conduit specification for the run back to the building
Getting the Groundwork Right Before the Panels Arrive
Racking is not the part of the project that sells itself, yet it sets the maintenance bill for the next two decades. Ask for the structural calculations, confirm the foundation suits the on-site soil, and settle the trenching plan before booking excavation equipment.
