Commercial Solar ROI & Payback in New Jersey: The 2026 Math

The single question most NJ commercial property owners ask before signing a solar contract: what’s the payback? The answer is more nuanced than a single number — it depends on your tax position, system size, utility rate schedule, and whether paired storage is included. This post walks through the actual math for a representative NJ project.

Sample Project: 250 kW NJ Commercial Rooftop

Consider a 250 kW solar system on a Cherry Hill warehouse. The facility runs on a PSE&G commercial rate schedule with $0.13 per kWh blended electricity cost. Annual electricity consumption: 800,000 kWh.

• Gross system cost: $400,000 ($1.60/W installed — typical 2026 NJ commercial pricing)
• Annual production: ~320,000 kWh/year (40% offset of facility usage)
• Annual energy savings: ~$41,600 (320,000 kWh × $0.13)

Layer 1: Federal Investment Tax Credit (30%)

Under current Inflation Reduction Act law, the federal ITC is 30% through 2032. Applied directly against federal tax liability — not a deduction.

• Federal ITC credit: $400,000 × 30% = $120,000

Layer 2: MACRS + Bonus Depreciation

Depreciable basis = gross cost − 50% of ITC = $400,000 − $60,000 = $340,000.

• Bonus depreciation (40% in 2025): $340,000 × 40% = $136,000 depreciated in Year 1
• Remaining $204,000 depreciated over 5 years via MACRS
• Tax savings at 25% effective corporate rate: ~$85,000 across years 1-5

Layer 3: NJ Successor Solar Incentive (SuSI)

SuSI pays production-based credits for 15 years at the current ART program year rate (approximately $90/MWh).

• Year 1 production: 320 MWh × $90 = $28,800/year
• 15-year total (with 0.5%/yr degradation): approximately $405,000

Layer 4: Net Metering and Property Tax Exemption

Net metering credits excess production at retail rate. Property tax exemption per N.J.S.A. 54:4-3.113 means no incremental assessment for the system.

Payback Math

Year 1 economic benefit:

• Energy savings: $41,600
• Federal ITC: $120,000 (one-time)
• Year 1 depreciation tax benefit: ~$45,000
• Year 1 SuSI credits: $28,800
• Year 1 total: ~$235,400

Cumulative through Year 5 (with declining bonus depreciation): approximately $360,000.

Simple payback: 4 to 6 years for typical NJ commercial projects with strong tax position. After payback, the system continues producing energy savings and SuSI credits through year 25 — a 19-year stream of positive cash flow.

What Changes the Math

Three things move payback materially:

• Tax position — taxable C-corps capture more value than tax-exempt entities (though IRA Direct Pay opens federal ITC to nonprofits and public schools)
• Demand charges — facilities with high demand charges benefit more from paired battery storage
• Roof age — projects requiring re-roof + solar add upfront cost but lock in current incentive rates

The path to a real number for your facility: a paid feasibility packet that pulls 12 months of utility data, confirms roof and electrical capacity, and models the full incentive stack against your specific tax position.