Ground Mount Solar in Ontario: Rules, Rebates, and Real Bifacial Gain

Ground mount solar is fully eligible for net metering in Ontario under O. Reg. 541/05, but it does not qualify for the Home Renovation Savings rebate, which covers rooftop systems only. Realistic annual bifacial gain over ordinary ground is under 10 percent, climbing toward 20 to 30 percent only with reflective surfaces and raised panels.

That is the short version. The longer version matters, because ground mount solar in Ontario sits at the intersection of three things that changed recently: a revoked provincial siting rule, a rebate program with an unusual condition attached, and a higher connection limit that took effect in 2026. This guide covers all three, with the numbers attributed and date stamped so you can check them yourself.

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Yes, and this is where a lot of older content online is simply out of date. From 2018 to 2021, a provincial rule called Ontario Regulation 274/18 blocked non rooftop solar from connecting on residential rate accounts and imposed a 15 metre property line setback. According to the Environmental Registry of Ontario, that regulation was revoked on July 1, 2021, and it is no longer in force. Any article telling you Ontario bans residential ground mount net metering is describing a rule that has been gone for five years.

Today, net metering in Ontario is governed by O. Reg. 541/05, as described by the Ontario Energy Board, and ground mount systems participate the same way rooftop systems do. Net metering means you export surplus electricity to the grid and earn credits against your electricity bill, and unused credits can carry forward for up to 12 consecutive months. Our net metering guide for Canada explains how the credit mechanics work in each province.

With the provincial siting rule gone, placement is now decided locally. Your municipality sets the zoning and permit requirements for ground mounted arrays, and they vary widely. The City of Toronto, for example, publishes setback distances of 15 metres from property boundaries and 30 metres from water bodies for ground mounted projects, per its solar permitting guidance. Your town may be stricter or looser, so checking the local bylaw is step one of any ground mount project, before design work and before any deposit.

One more 2026 change helps here. The Ontario Energy Board amended its Distribution System Code to raise the micro embedded generation threshold from 10 kW to 12 kW, effective May 1, 2026. In plain terms, a system up to 12 kW of nameplate capacity can use the simpler, faster connection process with your utility. Above 12 kW, the project moves into a more involved review that adds time and cost. The threshold applies to the connection itself, so it covers ground mount and rooftop systems equally.

Ontario's headline solar incentive is the Home Renovation Savings program, which as of August 2026 offers $1,000 per kW up to $5,000 for solar plus $300 per kWh up to $5,000 for battery storage, each capped at 50 percent of costs, per the official program site. The program's help and support documentation states that solar equipment must be installed on a rooftop of the eligible home or of a permanent structure fixed to the property, such as a detached garage or outbuilding, and that ground mounted solar is not eligible. Written pre approval is required before any equipment is purchased or installed. So a ground mount project plans around this rebate rather than with it, though a sound outbuilding roof can be a middle path worth checking with the program.

Here is the part many homeowners miss. The program states plainly that participants who take the solar and battery incentive are not eligible for a net metering agreement with their utility. The rebate funds load displacement projects only. Load displacement means the electricity your panels generate is used exclusively inside your home, with no export credits. So every Ontario homeowner faces a fork in the road: take the rebate and give up net metering for that system, or skip the rebate and keep net metering with its 12 month credit carryover.

That fork reframes the ground mount question entirely. A ground mount owner never had access to the rebate, but keeps the full net metering path, and a well sited ground array often produces more than a compromised roof would. Which path wins depends on your usage, your rate plan, your roof, and your land, and the honest answer requires modelling both. Our estimator models the net metering path and the zero export path side by side, and our current Canadian solar incentives page tracks program status as it changes.

Program details reflect the Home Renovation Savings program site as of August 2026. Programs change, funding caps apply, and no rebate or approval is guaranteed until confirmed in writing.

Bifacial panels generate from both faces: direct sunlight on the front, plus light reflected off the ground onto the back. That reflected share depends on albedo, which is the fraction of light a surface bounces back. Grass reflects little. Snow and white gravel reflect a lot.

The marketing figure you will see is 25 to 30 percent extra. The research says that number is real but conditional. Peer reviewed modelling by Sun and colleagues found that over natural groundcover with an albedo around 0.25, annual bifacial gain stays under 10 percent even with optimized tilt. Raising ground albedo to 0.5 pushes gain to roughly 20 percent, and elevating the panels about a metre above a reflective surface is what unlocks gains near 30 percent.

Figures are modelled estimates from peer reviewed bifacial research, August 2026. Actual gain depends on site geometry, row spacing, and surface maintenance.

Ontario winters cut both ways here, and honest modelling has to hold both facts at once. Snow is one of the most reflective natural surfaces, so rear side gain spikes in winter, and a steeply tilted ground array sheds snow faster than a shallow roof array. At the same time, snow sitting on the front of panels costs production, which is why the Solar Calculator Canada methodology models a province specific snow loss of 2 to 8 percent per year. The winter bonus and the winter penalty partially offset, and the net result is site specific.

Rooftop bifacial is not worthless either. Where racking leaves an air gap over a light surface, our methodology models a 5 to 10 percent bifacial gain for roof mounted systems. The difference is headroom: only a raised, spaced ground array over a reflective surface can reach the upper end of the range, because the geometry lets real light reach the rear cells.

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Solar Calculator Canada is an independent Canadian platform that provides free solar and battery estimates and matches homeowners with vetted installers. We do not install systems, so the pricing below reflects our published modelling assumptions, not a quote.

Per the Solar Calculator Canada methodology, August 2026, standard installed pricing runs on a tiered scale from $5.33 per watt for a 4 kW system down to $3.09 per watt for a 25 kW system, including equipment, installation, and labour. Ground mount projects typically add cost on top of that scale for engineered racking, foundations such as screw piles or concrete, and trenching for the wire run back to your electrical panel, and the trenching distance is often the biggest variable. A long run across a rural property costs meaningfully more than a short one. For scale, our published cost data lists a 10 kW rooftop system at $3.31 per watt, roughly $33,100 installed before incentives, and a ground mount version of the same system sits above that once the mounting and trenching work is added. Our solar panel cost page for Canada breaks down what moves pricing generally.

Payback depends less on the mounting method than on the path you choose and the rate plan you are on. A net metered ground array earning 12 months of export credits, an HRS rooftop system offsetting load directly, and a time of use household versus an ultra low overnight household all pencil out differently. These are estimates with stated assumptions, never guarantees, and installer quotes govern actual pricing. For the mechanics of that comparison with a worked Ontario example, see our guide to the solar payback period in Ontario.

Ownership is different at ground level too. A ground array can be cleared of snow, cleaned, and inspected from standing height, without ladders or roof access, which makes seasonal upkeep easier and safer than on a roof. The tradeoff is the ground itself: vegetation under and around the racking needs regular trimming so it does not shade the lower panel edges or crowd the rear face clearance that bifacial gain depends on.

An unbiased answer includes the cases where this does not work, so here they are. If your lot cannot meet your municipality's setbacks, the project stops before it starts. If your roof is sound, sunny, and well oriented, and your household uses most of its power during the day, the HRS rebate path on a rooftop may simply beat a ground mount on total cost, and the rear side gain will not close that gap. If your land is shaded by treelines to the south, the orientation advantage disappears. And if you are hearing a flat promise of 30 percent bifacial gain over grass, treat it as a red flag, because the published research does not support it.

Model both paths before signing anything. Our estimator is free, it models net metering and zero export scenarios against Ontario rate plans, and it will tell you when the numbers are unimpressive. If you then request quotes, your details may be shared with vetted installers in our network and we may earn from installer matching. You can read exactly how we vet installers before you decide.

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Editorial note: Program terms, regulatory thresholds, and rebate amounts are set by the Ontario Energy Board, the Ministry of Energy, each participating municipality, and the administrators of the Home Renovation Savings program. Figures on this page are current as of August 2026 and can change on the programs' own schedules. Confirm current terms with each administrator, and municipal bylaws with your city or town, before making a purchase decision.

1. Ontario Energy Board, Net Metering (O. Reg. 541/05).
2. O. Reg. 541/05, Net Metering, current consolidation on CanLII.
3. Environmental Registry of Ontario, revocation of O. Reg. 274/18, Siting Restrictions for Renewable Energy Generation Facilities.
4. Ontario Energy Board, Distribution System Code (micro embedded generation amendments in force May 1, 2026).
5. Home Renovation Savings program, solar panels and battery storage.
6. Home Renovation Savings program, Help and Support, solar eligibility requirements.
7. City of Toronto, Solar Permitting and Regulations.
8. Sun et al., Optimization and Performance of Bifacial Solar Modules: A Global Perspective (peer reviewed).