2026 Maryland Solar ROI & Electric Rate Breakdown by County (13 Counties)
Maryland 1:1 Retail Net Metering + Maryland SREC Market (~$55–$65/MWh) + 30% MD Battery Storage Income Tax Credit. Maryland Tax-Property Code § 7-242 exempts residential solar and storage from property tax reassessment + $1,000 MD Clean Energy Grant.
| County | Primary Electric Utility | Avg Rate ($/kWh) | Peak Sun Hours | Est. Yr-1 Savings | Cash Payback | County Teardown |
|---|---|---|---|---|---|---|
| Montgomery County | Pepco (Exelon) / BG&E | $0.21/kWh | 4.6 hrs/day | $2,620/yr | 10.5 yrs | View Math → |
| Prince Georges County | Pepco / BG&E / SMECO | $0.21/kWh | 4.6 hrs/day | $2,607/yr | 10.5 yrs | View Math → |
| Baltimore County | BGE (Baltimore Gas & Electric) | $0.21/kWh | 4.6 hrs/day | $2,546/yr | 10.8 yrs | View Math → |
| Anne Arundel County | BGE (Baltimore Gas & Electric) | $0.21/kWh | 4.6 hrs/day | $2,546/yr | 10.8 yrs | View Math → |
| Baltimore City | BGE (Baltimore Gas & Electric) | $0.21/kWh | 4.6 hrs/day | $2,546/yr | 10.8 yrs | View Math → |
| Howard County | BGE (Baltimore Gas & Electric) | $0.21/kWh | 4.6 hrs/day | $2,546/yr | 10.8 yrs | View Math → |
| Frederick County | Potomac Edison (FirstEnergy) | $0.19/kWh | 4.6 hrs/day | $2,323/yr | 11.8 yrs | View Math → |
| Harford County | BGE (Baltimore Gas & Electric) | $0.21/kWh | 4.6 hrs/day | $2,546/yr | 10.8 yrs | View Math → |
| Carroll County | Baltimore Gas and Electric (BGE) / Potomac Edison | $0.19/kWh | 4.5 hrs/day | $3,296/yr | 5.4 yrs | View Math → |
| Charles County | Southern Maryland Electric Cooperative (SMECO) | $0.18/kWh | 4.6 hrs/day | $3,180/yr | 5.6 yrs | View Math → |
| St. Mary's County | Southern Maryland Electric Cooperative (SMECO) | $0.18/kWh | 4.7 hrs/day | $3,249/yr | 5.5 yrs | View Math → |
| Washington County | Potomac Edison (FirstEnergy) / Hagerstown Light Department | $0.18/kWh | 4.4 hrs/day | $2,998/yr | 5.9 yrs | View Math → |
| Wicomico County | Delmarva Power (Exelon) / Choptank Electric Cooperative | $0.20/kWh | 4.7 hrs/day | $3,468/yr | 5.2 yrs | View Math → |
Recommended Home Battery & Hybrid Inverter Kits for Maryland
Turnkey solar salespeople routinely charge $3.60–$4.80/W by bundling 30% loan dealer fees and $12,000+ battery margins. Buying Tier-1 UL9540 hardware directly—either DIY or hiring a local licensed electrician ($1,500–$2,500)—cuts total cost by 50–65%.
EG4 18kPV Inverter + 14.3kWh PowerPro WallMount
The gold-standard UL9540 all-in-one hybrid system. Pair an 18kW PV input hybrid inverter (200A pass-through) with an indoor/outdoor IP65 14.3kWh LiFePO4 WallMount battery—saving $12,000+ vs turnkey quotes.
- 18kW PV Input / 12kW Continuous AC Output (200A Pass-Through)
- 14.3kWh LiFePO4 (8,000+ cycles @ 80% DoD)
- UL9540 & UL1741-SB Certified for Permit Approval
EcoFlow Delta Pro Ultra (6kWh–30kWh Modular)
Skip the $30,000 contractor quote and 6-month utility interconnection wait. Delivers 7.2kW–21.6kW continuous 120V/240V split-phase output and 5.6kW Solar Input right out of the box—expandable up to 90kWh.
- 7,200W–21,600W 120V/240V Split-Phase Output
- 6.1kWh LFP Stackable Battery (scales to 30kWh–90kWh)
- 5,600W Solar Input — Zero Roof Permit Required for Portable PV
Renogy 48V Off-Grid & Hybrid LFP Solar Kit
Complete modular 48V architecture combining high-efficiency N-type bifacial panels, a 48V 3,500W–5,000W MPPT inverter-charger, and smart modular LiFePO4 storage at ~$1.15/W hardware cost.
- 48V High-Efficiency Bus (75% lower copper wire loss)
- Modular 48V 50Ah / 100Ah Smart LiFePO4 Battery Bank
- Complete Plug-and-Play MPPT All-in-One Controller
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