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NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteTexas has the lowest commercial solar costs in the nation ($1.10-$1.35/W for large systems) but also the lowest commercial electricity rates ($0.098/kWh average). The economics work differently here — lower savings per kWh but more kWh produced and lower upfront investment. Model your 25-year IRR, NPV, and payback with ITC stacking, MACRS, and ERCOT rate sensitivity.
TX Large System
$1.10-1.35/W
Lowest in US
Annual Production
1,500-1,700
kWh/kW/year
Typical 25-Year IRR
14-22%
Cash purchase
C-PACE IRR
35%+
Leveraged return
Texas commercial solar projects achieve 14-22% unlevered IRR over 25 years for cash purchases, depending on system size, ITC adders (30-70%), and electricity rate assumptions. A typical 500 kW system at $1.20/W costs $600,000, receives a $180,000+ ITC credit, and generates $75,950/year in electricity savings at the $0.098/kWh average rate. Simple payback is 4-7 years. With C-PACE financing ($0 down), leveraged IRR exceeds 35%. Texas IRR is slightly lower than Massachusetts (16-24%) because electricity rates are 55% lower, but the 30-45% lower installation costs and 25-40% higher production keep returns competitive.
Texas commercial solar operates in a fundamentally different economic environment than Massachusetts or Connecticut. The numbers tell the story: Texas installation costs are 30-45% lower, annual production is 25-40% higher, but electricity rates are 55-60% lower and there is no state income tax for MACRS. The result is that Texas projects have comparable IRRs to northeastern states — but the financial mechanics are completely different.
In the Northeast, high electricity rates ($0.22-$0.23/kWh) drive massive annual savings that quickly overcome the higher installation costs. In Texas, lower rates ($0.098/kWh) mean each kWh saved is worth less, but you produce 25-40% more kWh per kW of capacity. And the lower installation cost means you need less savings to break even. The math converges to surprisingly similar returns — just through different paths.
| Metric | Texas | Massachusetts | Connecticut | Advantage |
|---|---|---|---|---|
| Install Cost (500 kW) | $1.20/W ($600K) | $1.75/W ($875K) | $1.65/W ($825K) | TX 31% lower |
| Annual Production | 1,550 kWh/kW | 1,175 kWh/kW | 1,200 kWh/kW | TX 32% higher |
| Commercial Rate | $0.098/kWh | $0.227/kWh | $0.221/kWh | NE 2.3x higher |
| Annual Savings (500 kW) | $75,950 | $133,363 | $132,600 | NE 75% higher |
| ITC (30% base) | $180,000 | $262,500 | $247,500 | NE higher $ (higher cost) |
| MACRS Tax Rate | 21% (fed only) | 29% (fed + state) | 28.5% (fed + state) | NE higher rate |
| State Incentive | None (property tax exempt) | SMART 3.0 | PURA tariff | NE has state programs |
| Simple Payback | 5-7 years | 4-6 years | 4-6 years | Comparable |
| 25-Year IRR | 14-20% | 16-24% | 15-22% | NE slightly higher |
This model assumes a 500 kW commercial solar system at $1.20/W ($600,000), 30% ITC, 20% bonus depreciation at 21% C-corp rate, 1,550 kWh/kW production, $0.098/kWh commercial rate with 2.5% annual escalation, and 0.5% annual panel degradation.
| Year | Investment | ITC Credit | MACRS Savings | Energy Savings | Cumulative |
|---|---|---|---|---|---|
| Year 0 | $-600,000 | — | — | — | $-600,000 |
| Year 1 | — | $180,000 | $38,556 | $75,950 | $-305,494 |
| Year 2 | — | — | $34,272 | $77,849 | $-193,373 |
| Year 3 | — | — | $20,563 | $79,795 | $-93,015 |
| Year 4 | — | — | $12,338 | $81,790 | $1,113 |
| Year 5 | — | — | $12,338 | $83,835 | $97,286 |
| Year 6 | — | — | $6,169 | $85,931 | $189,386 |
| Year 10 | — | — | — | $94,860 | $560,000 |
| Year 15 | — | — | — | $107,400 | $1,065,000 |
| Year 20 | — | — | — | $121,600 | $1,640,000 |
| Year 25 | — | — | — | $137,700 | $2,290,000 |
Despite Texas having the lowest commercial rates in the country, a 500 kW commercial solar system generates nearly $2.3 million in cumulative benefits over 25 years — a 3.8x return on the initial investment. This includes $180,000 in ITC, $124,000 in MACRS savings, and ~$2.0 million in electricity cost avoidance. The 100% property tax exemption saves an additional $240,000-$330,000 over 25 years.
The right financing structure depends on your tax situation, cash position, and balance sheet preferences. Texas businesses have four primary options, with C-PACE being particularly advantageous for property owners in Austin, Dallas, Houston, and San Antonio.
Upfront Cost
100%
ITC Benefit
Full (30-70%)
MACRS Benefit
Full (21% fed rate)
25-Year IRR
16-22%
Best for: Profitable C-corps or pass-through entities with high federal tax liability
Upfront Cost
$0 down
ITC Benefit
Full (30-70%)
MACRS Benefit
Full (21% fed rate)
25-Year IRR
20-35%+ (leveraged)
Best for: Property owners who want 100% financing while keeping all tax benefits. Active in Austin, Dallas, Houston, SA.
Upfront Cost
$0 down
ITC Benefit
PPA provider claims
MACRS Benefit
PPA provider claims
25-Year IRR
N/A (savings-based, not investment)
Best for: Nonprofits, schools, and entities with no/low tax liability. Typical PPA rate: $0.05-$0.08/kWh.
Upfront Cost
$0 down
ITC Benefit
Lessor claims
MACRS Benefit
Lessor claims
25-Year IRR
N/A (expense-based)
Best for: Businesses preferring off-balance-sheet treatment. Payments are operating expenses.
ERCOT wholesale prices are more volatile than regulated markets in the Northeast. This volatility creates both risk and opportunity for commercial solar investments. The table below models six scenarios to bound the range of possible outcomes.
| Scenario | Rate | Production | ITC | 25-Year IRR | Payback |
|---|---|---|---|---|---|
| Base Case | $0.098/kWh | 1,550 kWh/kW | 30% | 17.2% | 5.8 years |
| High Buyback REP | $0.098/kWh + 10¢ export | 1,550 kWh/kW | 40% | 22.4% | 4.2 years |
| ERCOT Rate Spike (+30%) | $0.127/kWh | 1,550 kWh/kW | 30% | 21.8% | 4.5 years |
| Low Production Year | $0.098/kWh | 1,400 kWh/kW | 30% | 14.6% | 6.5 years |
| Max ITC Stack (70%) | $0.098/kWh | 1,550 kWh/kW | 70% | 32.1% | 2.8 years |
| C-PACE Leveraged | $0.098/kWh | 1,550 kWh/kW | 30% | 35%+ (leveraged) | 0 years (cash positive day 1) |
Unlike regulated utility markets in MA and CT where rate increases follow predictable regulatory proceedings, ERCOT wholesale prices are market-driven and can spike dramatically. During Winter Storm Uri (2021), wholesale prices hit $9,000/MWh. Summer 2023 heat waves pushed prices above $5,000/MWh. While most commercial customers are insulated by fixed-rate REP contracts, rate escalation trends over 25 years are less predictable in Texas than in regulated markets. Model both 2.0% and 3.5% annual escalation to bound your IRR range.
While Texas has no state solar incentive program, the combination of federal tax benefits and the state property tax exemption creates a powerful incentive stack. For a 500 kW system:
Note: Property tax exemption value assumes 1.8% average TX property tax rate over 25 years. MACRS value based on $510,000 depreciable basis (after ITC reduction) at 21% C-corp rate with 20% bonus depreciation.
Complete guide to commercial solar in Texas: ITC, MACRS, financing, industry use cases.
Year-by-year MACRS schedule with entity type comparison and C-PACE interaction for Texas.
Compare solar value by TDU territory, REP buyback plans, and demand charge structures.
Texas commercial solar projects typically achieve 14-22% unlevered IRR over 25 years for cash purchases. The range depends on system size (larger = lower cost/W = higher IRR), ITC adders achieved (30-70%), electricity rate and escalation assumptions, and solar production (varies by region from 1,500 to 1,700 kWh/kW/year). With C-PACE financing, leveraged IRR can exceed 35% because the business invests $0 upfront while receiving tax credits and depreciation worth 40-55% of system cost in Year 1. Texas IRRs are slightly lower than Massachusetts (16-24%) or Connecticut (15-22%) because Texas electricity rates are 55-60% lower, but the lower system costs and higher production partially compensate.
Our team will build a 25-year IRR/NPV model specific to your Texas business — including your TDU territory, REP buyback rate, demand charge profile, and ITC adder eligibility.