2026 Plug-in & Balcony Solar Payback Calculator (US & UK)
Select your state or utility below or adjust the sliders to compare 800W–1,200W UL 3700 / ENA G98 kits with and without LFP battery storage.
Interactive 2026 Engineering Tool
California SB 868 (Plug and Play Solar Act) + UL 3700 Certification
Plug-in / Balcony Solar ROI & Self-Consumption Calculator
400W800 W1,600W
35% (No Battery)92%98% (With Smart Battery)
💰 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
California Legal Verdict: Passed Legislature (SB 868 — Awaiting Governor Signature, Sept 2026). SB 868 passed the California Legislature in August 2026 to legalize up to 1,200W plug-in solar systems on standard 120V outlets without utility interconnection fees (effective Jan 1, 2027 upon enactment). Under NEM 3.0, combining plug-in solar with a 1.6kWh–2kWh LFP battery avoids exporting at 8¢/kWh and offsets 58¢/kWh evening peak power.
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
EcoFlow
$1199
EcoFlow PowerStream / STREAM 800W Balcony Solar + 2kWh LFP Kit
- ✓Smart plug dynamic load allocation
- ✓Plug-and-play flat MC4 window cable
- ✓App-controlled TOU discharge schedule
Anker SOLIX
$3199
Anker SOLIX F3800 (3.84kWh / 6000W Split-Phase 120V/240V TOU Battery)
- ✓Native 240V NEMA 14-50 output for EV & Home Panel
- ✓Built-in Time-of-Use (TOU) peak shaving mode
- ✓Expandable up to 26.9kWh
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