Solar + battery installation in Quebec

Quebec's electricity is cheap, and that has always been the argument against rooftop solar here: Hydro-Québec's residential Tarif D is a two-tier volumetric rate rather than time-of-use, charging 7.065 cents per kWh on the first block and 11.142 cents on the rest. What changed is the LogisVert grant, which pays CA$1,000 per kW of installed capacity and covers up to 40 percent of eligible project costs, typically CA$5,000 to CA$6,000 on a residential system, for installations completed on or after June 30, 2025. Hydro-Québec's own projection is that it moves a typical residential payback from 25 to 30 years down to roughly 10 to 12, and you have 9 months from the installation date to apply. Exports run through the option d'autoproduction, 1:1 in kilowatt-hours into a banque de surplus, with article 2.50 of the tariff barring a negative bill. The detail that should govern sizing is article 2.51: the bank is zeroed every 24 months, on 31 March of an even year, and whatever remains is credited at 4.730 cents per kWh rather than at what you would have paid for that energy. Six municipalities run their own distributors, Sherbrooke, Saguenay's Jonquière borough, Alma, Magog, Baie-Comeau and Westmount, as does part of Saint-Hyacinthe, and none of this applies there.