What Size System is Right for Me?

EfstonScience customizes the design of your Solar Power System around your site and requirements to maximize your return on investment.

Here are some scenarios illustrating what you could expect in terms of costs, energy output and profits for 3kW, 5kW and 10kW MicroFIT-eligible Solar Power Systems.

3 kW MicroFIT Solar Power System

Shane has a downtown bungalow and wants to earn a regular monthly income without a tenant in the basement.

3kW Solar Power System installed on a sloped roof. Partial shading called for a micro-inverter system to maximize output and revenue.

3kW Solar Power System installed on a sloped roof

Partial shading called for a micro-inverter system to maximize output and revenue. Micro-inverters monitor output from each panel separately, so the Solar Power System continues to produce electricity even when not all the panels are producing power.

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5 kW MicroFIT Solar Power System


Ruth has a cottage with a garage and wants to offset the cost of maintaining a year-round cottage.

5kW Solar Power System installed on a sloped roof

The Solar Power System installation took advantage of the south-facing sloped roof of the two-car garage.

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10 kW MicroFIT Solar Power System


Eric has a small suburban factory and wants to turn an unused roof into a secure, green investment.

10kW Solar Power System installed on a flat roof

The installation includes includes south-facing ballasted mounts pitched 25° and spaced to avoid shading. Ballasted mounts use heavy materials, such as concrete, to hold panels on the roof, so penetration into the roof structure is not required.

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3 kW, 5 kW and 10 kW Solar System Comparison

MicroFIT Solar
Power Systems
3 kW System 5 kW System
10 kW System
System Configuration 12 x 250 W panels 20 x 250 W panels 46 x 250 W panels
System Size 220 ft2 total area 365 ft2 total area 2400 ft2 total area (after spacing)
Rated Output 3000 kW (DC) 5000 kW (DC) 11500 kW (DC)
Est. Avg. Annual Output1 3411 kWh/year 5684 kWh/year 13073 kWh/year
Est. Avg. Annual Income
(@80.2¢ per kWh)2
$2,735 per year $4,558 per year $10,485 per year
Total MicroFIT income
(20 -year contract)
$53,509 $89,775 $208,449
Total installed cost3 $18,500 $27,900 $58,000
Net profit $35,009 $62,072 $150,499
Lifetime CO2 reduction4 >12,000 kg >20,000 kg >58,000 kg

1 Estimated average output for Toronto, ON, as calculated by Natural Resources Canada RETScreen. Output estimates are averaged over the 20 years of the MicroFIT contract.

2 80.2¢ per kWh is paid by the Ontario Power Authority via the MicroFIT Feed-In-Tariff program.

3 Estimated total installed cost, exclusive of taxes at time of publication. In this highly competitive market prices are constantly changing. Contact us for the most up-to-date estimate.

4 Based on RETScreen estimated average greenhouse gas emission offset for power generated in Canada (.196 kg CO2 per kWh)

How much could you be earning from a MicroFIT Solar Energy System?


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