Net Metering Ontario: How Solar Credits Work and When They Expire
If you install solar panels in Ontario, net metering is how you get value from the electricity you don't use immediately. Here's how credits are calculated, when they expire, and whether net metering or HRSP load displacement gives you better returns.
Ontario net metering lets you bank solar credits in summer and draw them down in winter — but credits expire after 12 months.
1:1 kWh credits — export excess solar to the grid and receive credits that offset your electricity charges.
Credits expire after 12 months — unused credits on a rolling 12-month cycle are reset to $0.
Net metering vs HRSP — you must choose one path. HRSP offers up to $10,000 in rebates but requires load displacement (zero export).
Credits only offset electricity charges — delivery, regulatory, and debt retirement charges are not covered.
How Net Metering Works in Ontario
Ontario's net metering program is governed by O. Reg. 541/05 and administered by your local distribution utility (Hydro One, Toronto Hydro, Alectra, etc.). The concept is simple:
When your solar panels produce more electricity than your home uses, the excess flows to the grid
Your utility tracks the export through a bi-directional meter
You receive a 1:1 kilowatt-hour credit on your electricity bill for every kWh exported
Those credits offset future electricity charges when your panels aren't producing enough — at night, on cloudy days, or during winter
The credit applies to the electricity portion of your bill only. It does not offset delivery charges, regulatory charges, or the debt retirement charge. However, since electricity is the single largest component (typically 45–55% of a residential bill), the savings are substantial.
Important: Net metering is a credit system, not a payment system. Ontario does not pay you cash for excess generation. If you produce more than you use over 12 months, those credits expire — you don't get a cheque.
When Net Metering Credits Expire
This is the most misunderstood part of the program. Credits do not reset on a calendar year or billing anniversary. They operate on a rolling 12-month cycle:
Credits accumulate each month you export more than you consume
If you carry a credit balance for 12 consecutive months, any remaining credits at the end of that 12-month period are reset to $0
If you use up your credit balance before 12 months and then build a new credit, the 12-month clock restarts from the new credit date
What this means in practice: if your system is properly sized, you should build credits in summer (when production exceeds consumption) and use them in winter (when consumption exceeds production). If your system is oversized, you'll accumulate credits that expire unused — that's wasted production.
Sizing Example: How Credits Flow Through the Year
Here's a real-world example using an 8 kW system on a typical Ontario home:
| Month | Solar Production | Home Usage | Credit Balance |
|---|---|---|---|
| January | 350 kWh | 900 kWh | 0 kWh (draw 550) |
| February | 420 kWh | 850 kWh | 0 kWh (draw 430) |
| March | 650 kWh | 750 kWh | 0 kWh (draw 100) |
| April | 850 kWh | 600 kWh | +250 kWh |
| May | 1,050 kWh | 550 kWh | +750 kWh |
| June | 1,100 kWh | 600 kWh | +1,250 kWh |
| July | 1,080 kWh | 750 kWh (A/C) | +1,580 kWh |
| August | 980 kWh | 700 kWh | +1,860 kWh |
| September | 750 kWh | 600 kWh | +2,010 kWh |
| October | 520 kWh | 650 kWh | +1,880 kWh |
| November | 350 kWh | 800 kWh | +1,430 kWh |
| December | 300 kWh | 950 kWh | +780 kWh |
In this example, credits build from April through September and draw down through winter. By March of the following year, the balance returns to zero — perfectly sized. If credits remained at the 12-month mark, that surplus would be lost.
Net Metering vs Load Displacement (HRSP)
This is the decision that trips up most Ontario homeowners in 2026. Ontario's Home Renovation Savings Program (HRSP) offers up to $10,000 in rebates for solar + battery — but with a catch: HRSP requires load displacement, not net metering. You must choose one path.
| Factor | Net Metering | Load Displacement (HRSP) |
|---|---|---|
| Grid Export | Yes — excess goes to grid for credits | No — zero export required |
| Battery Required? | No (but helps) | Yes (to absorb excess) |
| HRSP Rebate | NOT eligible | Up to $10,000 |
| System Sizing | Sized to 100% annual usage | Sized smaller to avoid waste |
| Summer Excess | Credited to winter bills | Stored in battery or curtailed |
| Rate Arbitrage | Limited (credits offset flat rate) | Yes — battery shifts load to off-peak |
| Best For | Max offset, no battery | Rebate + battery + rate savings |
You cannot combine net metering with HRSP. If you accept the rebate, your system must be configured for zero grid export. Solar X advises on which path maximizes your 25-year return based on your specific consumption and rate plan.
Which Path Gives You Better Returns?
It depends on your rate plan and whether you're adding a battery:
Choose Net Metering If:
- •You're on TOU or Tiered pricing and don't plan to add a battery
- •Your annual consumption is under 8,000 kWh and a smaller system fully offsets your electricity
- •You want the simplest system with the lowest upfront cost
- •You're comfortable paying full price for solar (no HRSP rebate)
Choose Load Displacement (HRSP) If:
- •You're on or switching to ULO — the 35.2¢/kWh battery arbitrage makes load displacement significantly more profitable
- •You're adding a battery anyway for backup or rate savings
- •The $10,000 HRSP rebate makes solar + battery affordable within your budget
- •You want daily energy savings, not just annual credit cycling
For most Ontario homeowners in 2026, the HRSP + load displacement + ULO combination produces a higher 25-year return than net metering alone — even though net metering allows a larger system. The battery's daily rate arbitrage plus the $10,000 rebate more than compensate for the lost export credits.
How to Get Connected: Net Metering Application Process
If you choose the net metering path, here's the process with your local utility:
Preliminary consultation
Submit a request to your utility (Hydro One, Toronto Hydro, Alectra, etc.) describing your planned system
Connection Impact Assessment
Utility reviews your application and may require a technical study (fees apply, typically $500–$2,000)
Connection Agreement
If approved, the utility issues an agreement with connection costs and technical requirements
Installation and ESA inspection
Your installer builds the system and the Electrical Safety Authority inspects it
Bi-directional meter installation
Utility installs the meter that tracks both import and export
Net metering agreement
You sign the settlement agreement with your utility and credits begin accumulating
Timeline from application to operational: typically 3–6 months, depending on utility review times, permit processing, and installation scheduling. Solar X manages the full application and coordination process for all net metering projects.
Common Mistakes That Reduce Your Return
1. Oversizing the System
If your system produces significantly more than you consume annually, the excess credits expire after 12 months. You've paid for panels that generate electricity you'll never use. Right-sizing to 90–100% of annual consumption is the target for net metering.
2. Ignoring Rate Plan Interaction
Net metering credits offset electricity charges at whatever rate you're on. On TOU, excess exported during off-peak earns the same 1:1 kWh credit as on-peak. This means net metering doesn't benefit from rate timing the way a battery does. If you're on ULO, net metering is almost certainly the wrong choice — load displacement with battery arbitrage is far more valuable.
3. Not Accounting for Future Load Changes
Adding an EV, heat pump, or pool will increase your consumption. A system sized perfectly for today may be undersized in 2–3 years. Factor planned load growth into system sizing — or choose a panel configuration that allows easy expansion.
4. Assuming Credits Are Cash
Credits only offset electricity charges on your bill. They don't cover delivery, regulatory charges, or HST. And they expire. Net metering is valuable, but it's not a revenue stream — it's a cost-offset tool.
Frequently Asked Questions
Do I get paid for excess solar in Ontario?
No. Ontario's net metering program provides bill credits, not payments. Any excess credits after 12 consecutive months are forfeited. The microFIT program (which did pay for solar exports) closed to new applicants in 2017.
Can I switch from net metering to load displacement later?
Yes, but it requires reconfiguring your system and updating your utility agreement. If you originally installed without a battery (net metering) and later add a battery (load displacement), you would need to switch your connection agreement and may need a new ESA inspection.
What happens to my net metering credits if I sell my home?
Net metering credits do not transfer to the new owner. Any accumulated credits at the time of sale are forfeited. The new owner can apply for a new net metering agreement for the existing system.
Is net metering available everywhere in Ontario?
Yes. All licensed distributors in Ontario are required to offer net metering under O. Reg. 541/05. The application process varies by utility, but the right to net meter is province-wide for eligible renewable generation systems up to 500 kW.
Can I net meter with a battery?
Technically yes — you can have a battery and still be on net metering. The battery would store excess for your own use first, and only export to the grid what the battery can't absorb. However, if you're adding a battery, you should seriously evaluate the HRSP load displacement path instead, since it provides up to $10,000 in rebates that net metering doesn't qualify for.
Get the Right System for Your Situation
Net metering vs load displacement isn't a one-size-fits-all decision. It depends on your consumption, rate plan, whether you want a battery, and how you value the HRSP rebate against export credits. Solar X analyzes all of these factors during your site assessment and recommends the path that maximizes your 25-year return.
Solar X handles all utility applications, ESA permits, and HRSP pre-approval.