How Much Does Generator Installation Cost in Maine in 2026?
A standard 22 kW whole-house generator costs $9,000 – $14,500 installed in Maine (average vs. national average). The primary outage risk is nor'easters & ice storms. Best time to buy: may through september.
Why Maine Needs Backup Power
Maine experiences some of the worst winter storms on the East Coast. Central Maine Power (CMP) has been ranked among the least reliable utilities in New England, and rural areas can wait a week or more for power restoration after major nor'easters.
The December 2023 nor'easter left over 400,000 CMP customers without power, with some rural areas dark for a week. Power in Maine is served by Central Maine Power (CMP), Versant Power. According to the Maine State Electricity Profile, the state averages 3.5 outages per year with a mean duration of 10 hours per event.
3.5
Outages/year
10h
Avg duration
Nor'easters & ice storms
Primary risk
High winds & coastal storms
Secondary risk
How Much Does It Cost in Maine?
| Setup | Size | Cost Range (Installed) |
|---|---|---|
| Essential circuits | 10-16 kW | $6,000 – $10,000 |
| Whole house | 20-22 kW | $9,000 – $14,500 |
| Large home / liquid-cooled | 24-48 kW | $14,000 – $22,000 |
Near the national average despite higher shipping costs to rural areas. Propane installations can cost $500-$1,000 more than natural gas due to tank requirements. For a full national breakdown, see our installation cost guide. Not sure what size you need? Use our sizing guide.
Maine-Specific Installation Requirements
Local Building Code
Maine Uniform Building and Energy Code (MUBEC). Standard electrical permit. No unusual requirements beyond standard NEC compliance.
Additional code-related cost: $0 – $100
Permits
Permit timeline: 1-2 weeks. Cost: $50 – $200. Your installer handles the filing and inspection.
Preferred Fuel: Propane
Natural gas is only available in southern Maine (Portland area). Most of the state relies on propane, heating oil, or diesel.
Comparing brands? Read our Generac vs Kohler comparison.
Best Time to Buy a Generator in Maine
May through September. Nor'easter and ice storm season peaks October through March.
How Much Does a Home Generator Cost?
Get an instant estimate based on your home size and power needs.
Recommended size
22 kW
Estimated cost
$7,700 – $12,100
Includes equipment, installation, transfer switch, and permits
As low as $83/month with approved financing
Prices vary by location. Enter your ZIP code for local estimates.
Frequently Asked Questions — Maine
What size generator for a Maine home?
Average Maine home is about 1,600 sq ft. A 20 kW unit covers whole-house. Homes with electric heat (growing trend) need 22-24 kW.
Can I use natural gas in Maine?
Only in the Portland metro area. Most of Maine runs on propane or heating oil. Propane generators require a tank (250-500 gallon) which adds $500-$1,000 to installation.
How reliable is CMP?
Central Maine Power has been ranked among the worst utilities in New England for reliability. Multi-day outages after winter storms are common.
How long does permitting take in Maine?
1-2 weeks in most municipalities. Portland and surrounding communities are efficient.
Do I need a larger propane tank in Maine?
500-gallon minimum is recommended. A 22 kW generator running at half load uses about 2 gallons/hour. A 500-gallon tank gives you 10+ days of backup.
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