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Round Rock, Texas
This Round Rock homeowner wanted more than just lower electricity bills. With rates from Oncor (DFW) ($0.15/kWh) and CenterPoint (Houston) ($0.16/kWh) and Austin Energy ($0.12/kWh), the economics of solar were compelling — but the real driver was energy independence and backup power. After experiencing grid outages, having reliable backup became a priority.
In Texas, solar homeowners can benefit from programs like ERCOT utility-specific buyback. Property tax exempt (100%).
Important: The federal residential solar tax credit (Section 25D) expired on December 31, 2025. All savings calculations for this project reflect $0 federal tax credit for homeowner-purchased systems.
We designed a 14.3 kW system using 42 REC TwinPeak 4 340W panels (340W each). REC Alpha panels offer industry-leading efficiency and one of the strongest warranties in the market (25-year product and performance). Their heterojunction cell technology delivers excellent performance in low-light and high-temperature conditions.
The Enphase IQ7+ microinverters provide panel-level optimization and monitoring. Each panel operates independently, so shading on one panel doesn’t drag down the others. The Enphase Enlighten app provides real-time production data.
The Enphase Encharge-10 battery provides 10.08 kWh of usable storage with 12 embedded microinverters for reliable DC-to-AC conversion. It supports whole-home or essential-load backup depending on the electrical panel configuration.
Equipment Reviews
Texas operates on the deregulated ERCOT grid. Solar buyback rates vary by retail electricity provider. Some REPs offer 1:1 net metering equivalent plans.
Federal Tax Credit Status: The residential solar tax credit (Section 25D) expired December 31, 2025. Homeowner-purchased systems receive $0 federal tax credit. All savings estimates above are calculated without any federal credit. Third-party owned systems (leases/PPAs) may still benefit from the commercial ITC (Section 48/48E) claimed by the financing company.
“Large system with battery — NuWatt designed it to handle our pool pump, two AC units, and still have backup capacity. The ROI with Texas energy prices has been even better than projected.”
Homeowner in Round Rock, TX
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