EcoFlow DELTA Pro Ultra (6.1kWh / 7200W Whole-Home TOU Arbitrage System) — Maine ROI & Legal Compliance Calculator

High New England retail kWh rates make 800W–1200W plug-in solar kits in Maine pay for themselves in roughly 3 years.

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

400W7200 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.

EcoFlow $4999

EcoFlow DELTA Pro Ultra (6.1kWh / 7200W Whole-Home TOU Arbitrage System)

✓7.2kW continuous 240V output
✓Automated NEM 3.0 & PG&E TOU optimization
✓0ms UPS switchover

Check Price & Specs at EcoFlow →

Anker SOLIX $1299

Anker SOLIX Solarbank 2 E1600 Pro (800W/1200W Plug-in + 1.6kWh LFP)

✓Built-in 800W microinverter (expandable)
✓1.6kWh LiFePO4 battery (up to 9.6kWh)
✓Zero-export smart meter included

Check Price & Specs at Anker SOLIX →