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Lewisville solar costs $2.05–$2.45/W in Oncor territory. A 10 kW system runs ~$22,500 gross. Oncor offers up to $9,000 in solar+battery rebates — the best utility incentive in deregulated Texas. Plus TXU Energy's retail-match plan gives you effective 1:1 net metering. No federal 25D tax credit.
2026 Alert: The federal residential solar tax credit (Section 25D) expired December 31, 2025. Lewisville homeowners who purchase solar with cash or a loan receive $0 in federal tax credits. All prices shown are full installed cost. Programs like Propel Solar use a third-party owner to access the commercial ITC with $0 down.
What a Lewisville homeowner actually pays in 2026 — with and without the Oncor solar+battery rebate. Most homes in the Vista Ridge, Castle Hills, and Hebron areas are well-suited for 8-12 kW systems.
Oncor's solar+battery rebate is the best utility solar incentive in any deregulated Texas territory. Here is how Lewisville homeowners can qualify.
A typical battery (Tesla Powerwall 3, 13.5 kWh) costs $12,000-$13,000 installed. With the $9,000 Oncor rebate, your net battery cost drops to approximately $3,500. In the Lewisville area, the primary battery value is backup power during grid outages (ERCOT reliability concerns after Winter Storm Uri). If backup power is important to you, the Oncor rebate makes the battery an excellent deal. If you only care about solar ROI and do not need backup power, solar-only is simpler and still provides strong returns.
Lewisville sits in the heart of North Texas hail country. The Vista Ridge and Castle Hills neighborhoods have experienced significant hail damage in recent storm seasons. Choosing impact-resistant panels protects your investment.
| Panel | Hail Rating | Max Hail Size | Warranty |
|---|---|---|---|
| SunPower Maxeon 7 | IEC 61215 enhanced | 35mm (1.4 in) | 40 yr product + performance |
| REC Alpha Pure-RX | IEC 61215 enhanced | 35mm (1.4 in) | 25 yr product, 92% at yr 25 |
| Canadian Solar HiKu7 | Standard + enhanced testing | 25mm (1 in) standard | 25 yr product, 84.8% at yr 25 |
| Qcells Q.Peak DUO | IEC 61215 enhanced | 35mm (1.4 in) | 25 yr product, 86% at yr 25 |
Lewisville has the same excellent REP solar buyback options as Dallas. TXU Energy's retail-match plan is exclusively available in Oncor territory and gives you effective 1:1 net metering.
| REP | Plan | Buyback Rate | Contract | Rollover |
|---|---|---|---|---|
| TXU EnergyTop Pick | Solar Buyback 24 | Retail-match | 24 mo | |
| TXU Energy | Solar Buyback 12 | Retail-match | 12 mo | |
| Green Mountain Energy | Solar Buyback 36 | 8.5¢/kWh fixed | 36 mo | |
| Chariot Energy | Solar Buyback 24 | 7.0¢/kWh fixed | 24 mo | |
| Constellation | Solar Buyback 12 | 6.5¢/kWh fixed | 12 mo | |
| Shell Energy | Solar Buyback 24 | 6.0¢/kWh fixed | 24 mo | |
| Rhythm Energy | Solar Buyback | Wholesale (variable) | Mo-to-mo |
TXU Energy's Solar Buyback plan credits exported solar at the exact same rate you pay for consumption. This is effectively 1:1 net metering — the gold standard that most states mandate but Texas does not. If your TXU consumption rate is 15 cents per kWh, every kWh you export also earns 15 cents. This makes oversizing your system less risky because excess production retains full value. The TXU retail-match is only available in Oncor territory (DFW, Waco, Midland) — Houston and South Texas cannot access this plan.
The 100% Texas property tax exemption is the second-largest financial incentive for Lewisville solar owners after the Oncor battery rebate.
File Form 50-123 with the Denton Central Appraisal District (DCAD) by April 30 following your solar installation. This is separate from your homestead exemption. The exemption prevents your property taxes from increasing due to the added value of your solar system. At Denton County's 1.98% rate on a $22,500 system, this saves approximately $446 per year in the first decade. Lewisville homeowners file with the Denton Central Appraisal District at dentoncad.com.
Estimate your Lewisville-area solar costs, production, and savings. Accounts for 25D expiration, Oncor territory rates, and the Texas property tax exemption.
Estimate your solar cost, payback period, and 25-year savings for any major TX metro.
Federal Residential Solar Tax Credit (Section 25D) Expired
Homeowners who purchase solar with cash or a loan receive $0 in federal tax credits. Section 25D expired December 31, 2025.
CenterPoint delivery area. Deregulated — choose a solar buyback REP for best export value. High humidity reduces panel efficiency slightly. Strong solar irradiance despite cloud cover. Largest TX solar market by installed capacity.
Cost Range
$2.00–$2.40/W
Peak Sun Hours
5.3 hrs/day
Avg Electric Rate
$0.14/kWh
County Tax Rate
2.31%
Annual Production
15,476
kWh/year
Annual Savings
$1,800
per year
Payback Period
12.2
years
25-Year Savings
$65,627
total
Estimates based on average 2026 TX solar pricing, 5.3 peak sun hours/day, 0.5%/year panel degradation, 3%/year electricity rate increase, and TX property tax exemption (Tax Code §11.27). Actual costs vary by installer, roof condition, and system configuration. Section 25D residential ITC expired Dec 31, 2025 — $0 federal tax credit for cash/loan purchases.
The calculator reflects $0 federal tax credit for cash and loan purchases. Section 25D expired December 31, 2025. Programs like Propel Solar use a third-party owner to claim the 30% commercial ITC (Section 48/48E) for projects beginning construction before July 4, 2026.
The Oncor solar+battery rebate of up to $9,000 is not automatically included in the calculator. If you plan to add battery storage, subtract the applicable rebate from the total system cost for a more accurate net cost estimate.
Without net metering in Oncor territory, Propel Solar gives Lewisville homeowners $0 down solar with a fixed payment and full ownership by year 5.
A third-party financing company owns your system and captures the 30% Section 48 commercial ITC — savings that homeowners cannot access since 25D expired. That tax benefit funds your $0 upfront cost.
If your Lewisville electricity bill is $155/mo, your Propel payment is approximately $140/mo — saving roughly 10% from day one. The payment is fixed and predictable, unlike utility rates that increase 3-5% annually.
Full ownership transfers to you after approximately 5 years at no additional cost. Silfab 440W American-made panels with free maintenance during the financing period. You own the panels for the remaining 20+ years of their lifespan.
For Lewisville homeowners who do not have $22,500 in cash, Propel Solar provides immediate savings with zero upfront risk. The third-party owner handles maintenance, monitoring, and warranty claims during the financing period. Combined with Denton County's property tax exemption, Propel delivers strong value in Oncor territory.
Common questions about solar panel costs in Lewisville.
Solar pricing for Dallas proper — same Oncor territory, similar economics.
Read guideFull guide to the Oncor rebate program — eligibility, amounts, and how to apply.
Read guideComplete guide to REP buyback rates including TXU retail-match details.
Read guideCompare pricing across all Texas metros — Houston, Dallas, Austin, and more.
Read guideLast updated: March 8, 2026. Prices, rebate amounts, REP buyback rates, and utility programs may change. Contact NuWatt Energy or Oncor for current information.
NuWatt Energy partners with experienced DFW solar installers who know Oncor territory — from the battery rebate application to hail-resistant panel selection and TXU buyback optimization. Get a free assessment tailored to your Lewisville home and roof.