How much does a battery cost in Hawaii in 2026?

IEH named by 0 of 4

Asked every Monday since 9 Nov. Not named on any engine in any week. Last run Mon 7 Dec 2026, 06:00 HST.

What the engines answer nowSummarised by theStacc. Other company names are made up for this mock

Engine	What it says, in short	Price it gives	Who it names	Sources it shows	IEH
ChatGPT	Batteries cost more in Hawaii than on the mainland; suggests getting 3 quotes	$12,000 to $18,000	Pali Rooftop Solar, Makai Energy, a national battery brand	A 2024 cost guide, a news article	Not named
Perplexity	Gives a national average and adds a Hawaii markup; says incentives may apply	$11,000 to $17,000	Makai Energy, Island Grid Solar	2 national cost sites, a forum thread	Not named
Gemini	General answer about battery sizes; no Hawaii-specific price	$10,000 to $20,000	None	None shown	Not named
Google AI Overviews	Quotes one homeowner's price from a forum and a utility page on batteries	About $15,000	Pali Rooftop Solar	A forum thread, a utility page	Not named

Why IEH is missing: IEH's battery prices are only in the assistant's price table. No public IEH page states a battery price, so there is nothing for an engine to quote.

Draft answer pageWaiting for approval

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independentenergyhawaii.com/batteries/cost-hawaii-2026 How much does a battery cost in Hawaii in 2026?

One 13.5 kWh home battery, installed with new solar on Oahu or Maui, costs $13,000 to $16,000 in 2026. Adding one to a system you already have costs $14,500 to $17,500. Incentives are not included. The final price comes after a site visit.

What you buy	Installed price	Source
One 13.5 kWh battery, with new solar	$13,000 to $16,000	IEH price table, 1 Dec 2026
One 13.5 kWh battery, added to an existing system	$14,500 to $17,500	IEH price table, 1 Dec 2026
Solar panels	$4.00 to $4.60 per watt	IEH price table, 1 Dec 2026

What a battery did in the first 90 days

One Mililani home with 18 panels (7.74 kW) and one battery made 3,012 kWh from 8 Sep to 6 Dec 2026, 4% above what Google's Solar API expected for those months. That saved about $1,139. Of 46 owners who got a 90-day report since 9 Nov, 41 made within 10% of the expected amount or more.

See the price for your own roofLinks to the free roof estimate

Check your roof

Sources in this draft

IEH price tableApproved by Kainoa, Tue 1 Dec 2026. Valid until 31 Jan 2027

90-day owner reports46 reports since Mon 9 Nov. Example home has no name or house number

Google Solar APIExpected production behind the 90-day number and the roof estimate

Before you publish

Every price comes from the signed price table

Incentives are left out and the page says so

No owner name or house number

Leah or Kainoa has read the page

We check this question again on Mon 14 Dec. Engines can take weeks to find a new page, and may still not name IEH. Prices on the page expire with the table on 31 Jan 2027; we will ask for a new table before then.