Home / Powerwall Versus Enphase Versus Franklin

Powerwall Versus Enphase Versus Franklin

This is a side by side of published specs for three batteries homeowners ask about. It is not a recommendation. Which one fits depends on your house, your installer, and the quote.

Published Specs

Item	Tesla Powerwall 3	Enphase IQ Battery 5P	FranklinWH aPower 2
Capacity	13.5 kWh usable	5.0 kWh usable per unit	15 kWh listed
Continuous Power	11.5 kW	3.84 kW per unit	10 kW
Warranty	10 years, 70% energy retention	15 years, up to 6,000 cycles	15 years or 60 MWh throughput

Sources: EnergySage Powerwall 3 listing and the Tesla Powerwall Limited Warranty (USA); the Enphase IQ Battery 5P listing; the FranklinWH aPower 2 announcement.

How To Read The Table

• Per unit versus per system. Enphase batteries are modular. You add units to reach the capacity and power you want, so one unit is not comparable to a Powerwall 3 on its own.
• Usable versus nominal capacity. The FranklinWH announcement gives a 15 kWh figure and does not say whether it is usable. Ask for usable capacity in writing.
• Different warranty terms. A year count alone is not enough. Look at the retention promise, any cycle or throughput cap, and what use cases are covered.
• Listings can differ from datasheets. Figures shown here come from the sources above and may change with new models or regions. Check the current datasheet.

Differences That Matter In Practice

Internet connection. Tesla's warranty says it needs to update the Powerwall through remote firmware upgrades, and that if the unit is not connected to the internet for an extended period or has not been registered, Tesla may not be able to honor the full ten year warranty (it says it will always honor at least four years). See the Tesla Powerwall Limited Warranty (USA) for the exact wording.

Inverter design. Some batteries include their own inverter and some pair with the inverter you already own. This affects how easily a battery adds to an existing solar system. Ask each installer which setup they recommend and why.

Installer support. A strong spec sheet does little if the installer cannot service it in your area. Ask who handles warranty claims and whether they hold the manufacturer's certification, since programs vary by brand.

Questions To Bring To Installers

1. What is the usable capacity and continuous power of the exact system you are quoting?
2. How many units are in the quote, and can I add more later?
3. Which circuits are backed up, and can it start my air conditioner or well pump?
4. Who do I call for warranty service, and how long have you been installing this brand?

Read Warranty And Degradation for the fine print, then use How To Compare Installer Quotes to line up the answers.