Sources
Every document behind the figures, with the day it was read: 9 documents for the 7 battery configurations in the battery table, 5 product pages for the power stations, and the agency, statute and program pages behind the federal credit status, the cost guide and the incentives ledger. All read 8 Nov 2026, except that an entry in the incentives list shows its own date where the program page gives one. How the numbers are made is on methodology; the site's own policies are on about.
Data as of 8 Nov 2026, source: this page lists them all
Home batteries
- Tesla Powerwall 3: Powerwall 3 datasheet
- Tesla Powerwall 3: Powerwall Limited Warranty (USA), Rev. 2.6, effective 2026-05-06
- Enphase IQ Battery 5P: IQ Battery 5P data sheet DSH-00010-11.0 (2025-05-06)
- Enphase IQ Battery 10C: IQ Battery 10C data sheet DSH-00565-10.0 (July 2026)
- FranklinWH aPower 2: aPower 2 datasheet (APR-10K15V2-US), dated 2026-10-09
- FranklinWH aPower 2: FranklinWH System Limited Warranty for End Users, effective 2026-10-28
- Generac PWRcell 2, M6 cabinet (6 modules): PWRcell 2 specification sheet
- Generac PWRcell 2, M6 cabinet (6 modules): PWRcell 2 limited warranty, Rev. B (06/2025)
- Fortress Power eBoost 16: eBoost datasheet V.EBOOST_051326
Power stations
- EcoFlow DELTA 3 Plus: manufacturer product page
- EcoFlow DELTA Pro 3: manufacturer product page
- Anker SOLIX C2000 Gen 2 (F2000 page): manufacturer product page
- Jackery Explorer 1000 v2: manufacturer product page
- Bluetti Elite 200 V2: manufacturer product page
Appliance method
- U.S. DOE Energy Saver, Estimating Appliance and Home Electronic Energy Use (archived copy, 31 Dec 2023). The live energy.gov address returned HTTP 404 on 8 Nov 2026, so the archived copy was read.
Price per kWh
- Berkeley Lab, U.S. Distributed Solar and Storage 2026 Data Update (Aug 2026): read in full 8 Nov 2026; prices for paired PV plus storage are given in $ per W of PV (median $2.1/W higher than stand-alone PV for cash purchases), not $ per kWh of battery.
- NLR (NREL) Annual Technology Baseline 2025, Residential Battery Storage: read 8 Nov 2026; the cost breakdown is an image and the page text gives no $/kWh figure for the 5 kW / 12.5 kWh reference system.
- Manufacturer datasheets and warranty documents for the 7 battery configurations in the table: read 8 Nov 2026; none prints a price.
- EnergySage, Solar battery cost, updated 13 Jul 2026: third party market figure, used only as a separate row.
Federal credit
- IRS, Residential Clean Energy Credit: 30% credit for property installed through 31 Dec 2025; not available after that date.
- IRS, FAQs for modification of sections 25C, 25D, 25E, 30C, 30D, 45L, 45W and 179D under P.L. 119-21 (FS-2025-05, 21 Aug 2025).
- Congressional Research Service, Insight IN12611, Expiration and Carryforward Rules for the Residential Clean Energy Credit, 25 Sep 2025.
- Congressional Research Service, Insight IN12719, Technology-Neutral Clean Electricity Tax Credits Under the IRA and the OBBBA, 27 Jul 2026.
- 26 U.S.C. section 48E (uscode.house.gov) and section 25D (Cornell LII).
- Berkeley Lab, U.S. Distributed Solar and Storage 2026 Data Update (Aug 2026), used by the cost guide and the Powerwall 3 and Enphase 10C comparison.
Battery incentives
- California SGIP, ratepayer budgets (Small Residential Storage, RSSE ratepayer, others): selfgenca.com, statewide announcements (15 Dec 2025 and 21 Jan 2026 notices)
- California SGIP, AB 209 Residential Solar and Storage Equity: selfgenca.com, program metrics (tracker dated 7 Nov 2026)
- Connecticut Energy Storage Solutions: energystoragect.com, program changes effective 1 Apr 2026 and homeowner FAQ
- Green Mountain Power, Bring Your Own Device: greenmountainpower.com, Bring Your Own Device
- National Grid ConnectedSolutions batteries: greatergrid.com, National Grid ConnectedSolutions FAQ
- Eversource ConnectedSolutions batteries: greatergrid.com, Eversource ConnectedSolutions FAQ
- Xcel Energy Renewable Battery Connect: co.my.xcelenergy.com, Renewable Battery Connect
- Oregon Solar + Storage Rebate Program: oregon.gov/energy, Solar + Storage Rebate Program for homeowners
- Maryland Residential and Commercial Energy Storage Program (FY27): energy.maryland.gov, FY27 RCES funding opportunity announcement (PDF)
- LUMA Customer Battery Energy Sharing (CBES): luma.virtualpeaker.io, CBES enrollment page
- Mass Save ConnectedSolutions batteries: could not verify, masssave.com returned HTTP 403 with a bot challenge.
- Hawaiian Electric battery programs: could not verify, hawaiianelectric.com returned HTTP 403.
- PSEG Long Island Battery Storage Rewards: could not verify, psegliny.com returned a service-unavailable page.
- NYSERDA residential storage incentives: could not verify, nyserda.ny.gov showed a bot challenge.
- New Jersey Garden State Energy Storage Program: could not verify, the page address we tried returned HTTP 404 and we did not find a current one.
- PG&E and SCE own battery pages: could not verify, pge.com returned Access Denied; SCE not opened. Their SGIP role is covered by the two SGIP rows.
- NV Energy residential storage incentive: could not verify, only an older incentives handbook could be read, which does not show whether the program is open now.
Fonts
- Plus Jakarta Sans, SIL Open Font License 1.1, self-hosted.