Tesla Powerwall 3 vs Enphase Battery: Which Is Better for Hawaii Homes?

For most Hawaii homes, we recommend the Tesla Powerwall 3 for the best savings. One Powerwall 3 adds 13.5 kWh of storage for about $13,000, while an Enphase IQ Battery 10C costs about $19,000 for 10 kWh or about $27,000 for 20 kWh installed. Enphase is a great modular choice, especially for homes that already have Enphase microinverters, but it costs more per kWh of storage.

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Independent Energy Hawaii is a Tesla Premier Certified Installer and also installs Enphase, Franklin and Sigenergy batteries, so we’ll recommend whichever fits your home.

Side-by-side comparison

	Tesla Powerwall 3	Enphase IQ Battery 10C
Storage	13.5 kWh per unit	10 kWh per unit
IEH price	About $13,000 for one, $22,000 for two, $32,750 for three (with new IEH solar)	About $19,000 for 10 kWh, about $27,000 for 20 kWh (installed)
Design	One large unit with a built-in solar inverter	Modular units that pair with Enphase microinverters
Extended coverage	Optional Solar Insure battery coverage, subject to equipment eligibility and policy terms.	Ask about equipment eligibility and optional Solar Insure battery coverage.

Choose a Tesla Powerwall 3 if…

You want the most storage for your money.
You want to back up large loads. For AC, we recommend two or more Powerwalls.
You’re installing new solar and a battery at the same time.

Choose Enphase if…

You already have Enphase microinverters.
You prefer a modular system and don’t mind paying more per kWh.

How long will one battery last in an outage?

One Powerwall 3 can run essentials like your fridge, lights, Wi-Fi and fans for about a day under modest essential-load usage, potentially longer with solar recharging it. Actual runtime varies with loads, charge, weather and system design. For AC, we recommend two or more batteries. See our storm and outage prep guide.

Do I need a battery?

We recommend every solar customer consider a battery to use more of their own energy and power selected circuits during outages. Savings and runtime depend on system design, usage, utility rules, weather and stored charge. Off-grid operation requires a separate assessment.

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Frequently Asked Questions

Is Tesla Powerwall or Enphase better for Hawaii homes?

For most Hawaii homes, we recommend the Tesla Powerwall 3 for the best savings: about $13,000 for 13.5 kWh, compared with about $19,000 for a 10 kWh Enphase IQ Battery 10C. Enphase is a good fit for homes that already have Enphase microinverters.

How much does a Tesla Powerwall 3 cost in Hawaii?

Added to a new Independent Energy Hawaii solar system, one Powerwall 3 costs about $13,000, two cost about $22,000, and three cost about $32,750. Battery-only installs qualify for the Participate Energy prepaid lease, about 30% off upfront.

How much does an Enphase battery cost in Hawaii?

An Enphase IQ Battery 10C installed by Independent Energy Hawaii costs about $19,000 for 10 kWh or about $27,000 for 20 kWh.

Can I add a battery to my existing solar system?

Yes. Batteries can be added to many existing systems after we confirm equipment compatibility, electrical capacity and utility requirements at a site survey. Get a free estimate.

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