Every price here is KAJK's introductory price, before tax. You pay that price plus Ontario's 13% HST, and the rebate is paid to you once the program approves the claim after the install, so it comes off the total with tax.
The estimated rebate comes from Ontario's Home Renovation Savings Program, run by Enbridge Gas and the IESO: $1,000 per kW of solar up to $5,000, and $300 per kWh of battery up to $5,000, each up to half of that part's cost before tax (homerenovationsavings.ca, read 2026-11-05).
Every package is 5 kW or more, so the solar part earns the full $5,000. The battery part depends on its size:
- No battery
- Solar rebate $5,000. Total rebate $5,000.
- 10 kWh battery
- Battery rebate $3,000 (10 × $300). Total rebate $8,000.
- 20 kWh battery
- Battery rebate $5,000, the cap (20 × $300 would be $6,000). Total rebate $10,000.
- 30 or 40 kWh battery
- Battery rebate $5,000, the cap. Total rebate $10,000.
A worked example: the 10 kW package with a 20 kWh battery is $39,118 before tax. HST adds $5,085, for $44,203. Take off $5,000 for the solar and $5,000 for the battery, and your price after rebate is $34,203, tax included.
What else moves a quote, from the roof and the electrical panel to the connection, is in our guide to solar panel cost in Ottawa.