How much does an 800W–1200W plug-in solar kit save in Maine?

At Maine's average electricity rate of $0.26/kWh ($0.34/kWh peak) and 4.3 daily sun hours, an 800W–1200W system with LFP battery storage saves approximately $347 per year.

Maine Plug-in / Balcony Solar Calculator (1200W 2026 Guide)

2026 Legal Status: Legalized in Law (2026 Plug-in Solar Act — Up to 1,200W) · Avg Retail Tariff: $0.26/kWh (Peak: $0.34/kWh)

Interactive 2026 Engineering Tool

Plug-in / Balcony Solar ROI & Self-Consumption Calculator

Maine Plug-in Solar Appliance Law (UL 3700)

Solar Array Wattage (W) — Legal Limit: 1200W

400W800 W1,600W

Electricity Rate ($/kWh Peak/Daytime)

Daily Peak Sun Hours (Maine Avg: 4.3 hrs)

Direct Self-Consumption % (With LFP Battery = 92%, Without Battery = 55%)

35% (No Battery)92%98% (With Smart Battery)

Complete Kit Cost ($)

Apply 30% Federal Clean Energy Tax Credit (IRC §25D — expires Dec 2032)

💰 Your 30% ITC Savings: $0 back on your federal taxes. Effective cost after credit: $0. Adjusted payback: 0 yrs.

Verified Yield & Payback Output

Annual Solar Output

1,380 kWh

Annual Bill Savings

$510/yr

Simple Payback Period

2.5 Years

10-Year Net Profit

$3,800

Maine Legal Verdict: Legalized in Law (2026 Plug-in Solar Act — Up to 1,200W). High New England retail kWh rates make 800W–1200W plug-in solar kits in Maine pay for themselves in roughly 3 years.