Storage is the part that changed

Ontario's Home Renovation Savings Program pays up to $10,000 for solar with battery storage. The condition is the interesting part, and it is worth understanding because it tells you what the system is actually being paid to do.

Solar alone does not help a grid at its peak

A Canadian electricity system's hardest moment is a winter evening: dark, cold, and everybody home. Solar generates nothing at that hour. A battery charged during the day does, which is why the incentive is attached to the pair rather than to the panels.

What it means for a household

Three things follow. The system keeps working in an outage, which in an ice-storm province is not a small benefit. It can shift consumption away from expensive hours where time-of-use pricing applies. And it makes the household's own load profile flatter, which is the thing utilities are increasingly willing to pay for — Efficiency Canada counted thirty demand-flexibility programmes nationally in its 2025 report.

And the same caveat as always

A battery sized against an unmeasured load is a guess. Model the house, size the envelope work, then size the system — in that order, because each step makes the next one smaller and cheaper.