FranklinWH Battery Review: Cost, Specs & How It Compares to Powerwall

FranklinWH Is Changing the Home Battery Game

If you have been shopping for a home battery system, you have probably seen the same two names everywhere: Tesla and Enphase. But there is a third option gaining serious momentum. FranklinWH, a California-based energy company, has built a battery system that many installers now consider the most complete whole-home backup solution on the market.

The FranklinWH aPower battery pairs with the company's aGate smart controller to deliver something most competitors cannot: true whole-home energy management with a built-in automatic transfer switch.

FranklinWH aPower Battery: Full Specifications

Usable capacity: 13.6 kWh per battery

Continuous power output: 5 kW per unit

Peak power output: 10 kW per unit

Battery chemistry: LFP (lithium iron phosphate)

Stackable: Up to 15 units (204 kWh total)

Round-trip efficiency: 89 percent

Warranty: 12 years

Weight: Approximately 276 lbs per unit

LFP Chemistry: Why It Matters

The FranklinWH aPower uses lithium iron phosphate cells. LFP is inherently more thermally stable than NMC batteries, typically lasts 5,000 to 8,000 cycles versus 2,000 to 4,000 for NMC, and degrades more slowly over time. The trade-off is slightly lower energy density, meaning a physically larger battery for the same capacity.

The aGate Controller: FranklinWH's Secret Weapon

The aGate is a smart energy management controller that sits between the grid, your solar panels, your battery, and your electrical panel.

Automatic transfer switch (ATS): Built-in, automatically disconnects from grid during outages

Energy management: Real-time optimization of charge, discharge, import, and export

Smart panel functionality: Circuit-level monitoring and control without a separate smart panel

Generator integration: Works alongside backup generators to charge batteries or power your home

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FranklinWH Battery Cost

Single Battery System (aGate + 1 aPower)

Equipment and installation: $15,000 to $19,000

After 30 percent federal tax credit: $10,500 to $13,300

Two Battery System (aGate + 2 aPower)

Equipment and installation: $27,000 to $35,000

After 30 percent federal tax credit: $18,900 to $24,500

The cost per kWh decreases with additional batteries because the aGate controller is a one-time expense.

Franklin Battery vs Tesla Powerwall 3

Capacity: FranklinWH 13.6 kWh vs Tesla 13.5 kWh

Continuous output: FranklinWH 5 kW vs Tesla 11.5 kW

Stackable units: FranklinWH up to 15 vs Tesla up to 4

Integrated inverter: FranklinWH No vs Tesla Yes

Built-in ATS: Both Yes

Warranty: FranklinWH 12 years vs Tesla 10 years

Tesla has a clear advantage in continuous power output at 11.5 kW versus 5 kW. However, FranklinWH supports up to 15 units (204 kWh) versus Tesla's limit of four (54 kWh), making it better for scaling.

Tesla is cheaper per kWh, but the FranklinWH price includes the aGate controller with its built-in ATS and smart energy management.

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FranklinWH vs Enphase IQ Battery 5P

Enphase's modular 5 kWh units are the most flexible option but more expensive per kWh. Matching FranklinWH's capacity requires three Enphase units at approximately $21,000. Enphase wins on warranty (15 years vs 12) and Enphase ecosystem integration. FranklinWH wins on whole-home backup capability and total system cost.

Who Should Choose FranklinWH?

You want true whole-home backup without choosing specific circuits

You plan to scale up over time with support for up to 15 units

You value safety and longevity with LFP chemistry and 12-year warranty

You want an all-in-one system where every component is designed to work together

Professional solar installers mounting panels on a roof - FranklinWH Battery Review: Cost, Specs & How It Compares to Powerwall

Who Should Look Elsewhere?

Budget-conscious shoppers: Tesla Powerwall 3 delivers more storage for less money

Existing Enphase users: IQ Battery 5P integrates more seamlessly

You need maximum power from a single unit: A single aPower's 5 kW cannot match the Powerwall 3's 11.5 kW

Get a FranklinWH Quote Through SmartEnergyUSA

Ready to explore whether the FranklinWH aPower is right for your home? SmartEnergyUSA connects you with certified FranklinWH installers in your area. Compare quotes, review system designs, and find the best franklin battery solar configuration for your needs. Get your free quote today.