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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 QuoteEssential circuits plus comfort loads. 10-20 kWh capacity, $10,000-$20,000 installed.
1-2 Tesla Powerwall 3 or Enphase IQ 5P stack.
Partial-Home Backup
$10,000-$20,000
Before incentives
10-20 kWh
1-2 Tesla Powerwall 3
12-24 hours
Essential loads
Program
Grid Resilience
$10,000
From (installed)
A partial-home battery system backs up your most important circuits — refrigerator, lights, internet, some outlets, and possibly a mini-split — without the cost of whole-home backup.
For Houston homeowners served by CenterPoint Energy (Houston) at $0.14/kWh, a partial-home backup system (10-20 kWh) stores enough energy to cover your essential and comfort circuits for 12-24 hours during a grid outage.Texas averages 48 hours of outages per year.
System example: 1-2 Tesla Powerwall 3 or Enphase IQ 5P stack. Installed cost: $10,000-$20,000 before incentives.
Ideal For
Pros
Cons
Expired December 31, 2025. Homeowners purchasing batteries with cash or a loan receive $0 federal tax credit.
Texas has no state battery rebate but batteries are essential for grid resilience.
Compare what you can run during a grid outage with each battery tier.
| Appliance | Whole-Home | Partial-Home | Critical-Load |
|---|---|---|---|
| Central AC/Heat | |||
| Oven/Range | |||
| Clothes Dryer | |||
| EV Charger | |||
| Mini-Split | |||
| Sump Pump | |||
| Refrigerator | |||
| LED Lighting | |||
| Internet/Wi-Fi | |||
| Phone Charging |
NuWatt installs these systems for partial-home backup in Houston.