Tesla vs. Enphase vs. FranklinWH: Which Solar Battery is Right for Your Home?

If you’re considering solar + battery storage for your home, you’ve probably heard of Tesla Powerwall, Enphase IQ Battery, and FranklinWH aPower. All three are leading solutions in the solar energy market — but they are very different in performance, flexibility, and value.

At Ally Electric and Solar Inc. (Richmond, CA), we install all three systems and help homeowners choose the best fit. Let’s compare them side by side.

Tesla Powerwall 2

  • Usable Capacity: 13.5 kWh

  • Power Output: 5 kW continuous, 7 kW peak

  • Scalability: Up to 10 units

  • Warranty: 10 years

  • Best For: Homeowners who want a proven, all-around battery solution with strong brand recognition.

Tesla is popular because it’s widely known and integrates well with Tesla vehicles. However, it lacks advanced bidirectional charging features in the U.S.

Enphase IQ Battery

  • Usable Capacity: 3.36 kWh (modular)

  • Power Output: 1.28 kW (per unit)

  • Scalability: Highly modular (add as many as needed)

  • Warranty: 10 years

  • Best For: Homes that want smaller, scalable batteries — ideal for gradually adding storage over time.

Enphase is great for flexibility and small-to-medium homes, but power output per unit is lower compared to Tesla and FranklinWH.

FranklinWH aPower + aGate

  • Usable Capacity: 13.6 kWh

  • Power Output: 5 kW continuous, 10 kW peak

  • Scalability: Expandable with multiple units

  • Warranty: 12 years (industry leading)

  • Best For: High-demand homes, EV owners, and those seeking bidirectional charging.

FranklinWH stands out for bidirectional charging technology (Vehicle-to-Home ready), smart load management, and one of the strongest power outputs in the industry.

Quick Comparison Matrix

Feature Tesla Powerwall 2 Enphase IQ Battery FranklinWH aPower

Usable Capacity 13.5 kWh 3.36 kWh (modular) 3.6 kWh

Power Output 5 kW cont. / 7 kW peak 1.28 kW (per unit) 5 kW cont. / 10 kW peak

Scalability Up to 10 units Highly modular Expandable

Bidirectional Charging Limited in U.S. Not natively Yes (V2H-ready)

Warranty 10 years 10 years 12 years

Best Use Brand trust, all-around Small homes, flexible growth High-demand + EV-ready homes

Which One is Right for You?

  • Choose Tesla Powerwall if you want a reliable, well-known product with solid all-around performance.

  • Choose Enphase IQ if you want a modular, scalable system for gradual upgrades.

  • Choose FranklinWH if you want the highest performance, EV charging support, and future-ready technology.

How Ally Electric and Solar Inc. Can Help

We know that every Bay Area home has different needs. That’s why at Ally Electric and Solar Inc. (Richmond, CA), we:

  • Provide free assessments of your energy use.

  • Recommend the best battery system (Tesla, Enphase, FranklinWH).

  • Handle main service panel upgrades to support higher loads.

  • Offer professional installation + long-term support.

Whether you need energy security, lower utility bills, or EV charging integration, we’ve got you covered.