To get estimates for your roof please use our calculator or contact us for a detailed proposal.

Assumptions
Graphs are based on a 10 kW system (25 * 400 watt LG panels paired with Enphase iQ7+ microinverters) priced at $28,750 (installation cost and HST included), an escalation rate of 2.9% annually, a rebate amount of $0.60/watt DC totaling $6,000.
NSP’s rate will increase by 2.9% yearly,
Your solar panels will degrade at a linear rate of 0.5% yearly,
a 180 degree azimuth and 25 degree slope was used (HRM, NS).
Why Assume?
Historically, provincial power rates have increased by an average of 2.9% annually,
3% annual increase is conservative and matches inflation,
Industry analysts anticipate the rate to be $0.25/kWh by 2030.
Estimating the rate escalation isn’t easy. We can only go with our best predictions.

The amount of power that your system produces will decrease over time, generally at a rate of 0.5% annually (the panels are warrantied against degrading faster than this). The value of the power that your system produces will increase over time. Historically the electricity rates have increased by 2.9% annually in Nova Scotia and we predict they will continue at this rate.

To get the exact payback period you would need to multiply the kWh production for each year in the system’s lifespan (25 – 35 years) factoring in the 0.5% degradation rate by the corresponding year’s utility rate factoring in a linear increase in the value of power (we use 2.9%). Once you have a value for each year for the next 25 years take the sum and divide it by the number of years. This will give you the average value of power produced for the system’s lifespan. Divide the net cost of the system by that figure to get your payback period in years.

We calculated the total savings over 25 years for this system and got $71,027.29, averaging $2,841.09 per year.

Net Cost With Rebate (Including HST): $22,750 | Payback period = 8.0 years | Net Cost Without Rebate (Including HST): $28,750.00 | Payback Period = 11.1 years

To figure this out we take the estimated yearly kWh production of your solar system and divide it by your total yearly kWh usage. The result is an offset percentage, i.e. how much of your total electricity consumption that will be met by your solar system. This graph shows an offset of 98% because the system is estimated to produce 12,984 kWhs each year and the home owner spends an average of $175 per month on electricity. $175 per month is 13,125 kWhs per year.

**12984 / 13125 = 98%.**

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in 2021

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in 2026

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in 2031

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in 2036

With a payback period averaging less than 10 years, you can expect your solar system to have paid for itself more than 2 times over within its warrantied lifespan. Much less with the Efficiency Nova Scotia SolarHomes rebate!

The lengthy warranty guarantees your return on investment. Once the warranty is over, that doesn’t mean your system will suddenly stop working. You can expect a good 25-45 years of good production.

Tree seedlings grown for ten years

Vehicle off the road for one year

Gallons of gas not consumed

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- 855-447-7222
- contact@wattsupsolar.ca
- 14446 Evangeline Trail, Wilmot, NS