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Solar • Storage • Long-term savings

Solar & Battery ROI Calculator

Estimate the cost, Québec grants, yearly savings and payback of a solar system with Elios batteries over 20 years. All amounts in CAD.

Configure your system

Solar & battery investment

Choose model and quantity. Capacity and price update automatically.
See the batteries: Litio5.12 · Litio10.2 · Litio16
Total nominal energy capacity for the selected batteries.

Québec grant assumptions

Grant amounts shown are maximum estimates, subject to qualification. Battery and connection aid requires eligible residential work.

Recommended: leave this unchecked to see the true photovoltaic solar ROI. Batteries are not part of the solar electricity-generation system. Their main purpose is backup power during outages; they do not increase solar-panel electricity production. Their purchase and backup installation costs, and the related battery grants, are therefore normally excluded from solar-only ROI. Check this box to see the combined solar + battery investment payback instead.

Energy production & savings

Simple payback
20-year ROI
20-year net benefit
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Project cost & incentives

Installed solar (battery excluded)
Battery system
Backup installation
Gross project cost
Hydro-Québec solar grant
Rénoclimat battery grant
Rénoclimat connection grant
Net customer investment
ROI calculation basis:
Complete project after all selected grants: (includes batteries and backup installation, whether or not they are included in ROI).
The solar grant’s 40% cap is applied to the solar portion only, excluding batteries. Values exclude taxes and financing.

Estimated first-year returns

Annual solar production
Electricity bill savings / value
Net first-year benefit

Cumulative net cash flow

Starts with the selected ROI investment at year 0 (solar only by default; full project if batteries are included). The green payback marker shows the estimated point where cumulative net cash flow reaches $0. Annual savings include panel degradation and the yearly electricity price rise entered above. Not discounted for inflation or cost of capital.

20-year annual breakdown

YearOutput (kWh)Power savingsAnnual netCumulative

Important assumptions

This is a financial illustration, not a grant approval. A household cannot assume all solar generation is worth the retail electricity rate; the adjustable “solar energy valued” percentage approximates self-consumption and the economic value of exports. By default, battery and backup-installation costs and their related grants are excluded from solar ROI because batteries provide backup power rather than additional solar generation. The ROI toggle lets you include their net cost in an overall project ROI. Battery storage adds resilience but is not assigned independent arbitrage revenue. Grants must be validated for the exact property and work. Savings and grant eligibility are not guaranteed over 20 years.

Sources: Hydro-Québec LogisVert · Québec Rénoclimat (Oct. 2026). How the Hydro-Québec solar grant works

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