How we rank & review

Last updated October 13, 2026

The honest answer first: we haven't physically tested the power stations and batteries on this site. What we do is compute rankings from manufacturer specs and regular street prices, then check those numbers against independent hands-on testing from labs, reviewers and owners, and link every source so you can read it yourself. Commission is never an input.

What we are, and what we aren't

HomeGridHQ is a decision engine and an auditor. We aren't a test lab. Plenty of review sites imply hands-on testing they didn't do. We'd rather tell you plainly where our information comes from.

Every review has a section headed "What people who actually tested it found." That's where we collect measured results from outlets that did put the unit on a bench or in a cabin: StorageReview, OutdoorGearLab, TrustedReviews, TheSolarLab, Clean Energy Reviews, and owner threads on forums like DIY Solar Power Forum, among others. Each finding names who reported it, when, and links to the original.

We go looking for results that contradict or qualify the spec sheet, because that's what a spec sheet can't tell you. A unit can deliver its rated capacity and still lose about a fifth of the energy you put into it on the round trip. That kind of finding is the point.

Our sourcing rules

We never attribute a number to an outlet unless we've opened that outlet's page and seen the number there. Search summaries and AI overviews blend sources and get attribution wrong, so they don't count.
Every hands-on claim links to its source, with the reviewer and date.
When the only available figure comes from the manufacturer, we say so.
Specs come from first-party spec sheets and manuals. When a manufacturer's numbers conflict, or a headline number only applies under narrow conditions (like a surge rating that only holds for resistive loads), we use the conservative figure and add a warning to the review.

How prices work

Rankings use the price a walk-up buyer actually pays, not a list price that nobody pays and not a flash sale.

The rule: the first-party, non-member, base-unit regular price. That means the manufacturer's own store (or the standalone Amazon listing where that's the main channel), the bare unit with no bundled panels or batteries, without a members-only or login-gated discount.
Promos don't count. If a unit is on sale, we may mention the sale, but we rank it on its regular price. A temporary discount shouldn't crown a permanent winner.
Re-checked weekly. Prices are re-verified on a weekly cycle, and every review shows the date its price was last checked and where it came from.
The whole set or nothing. When we re-check the price of a brand we earn a commission on, we re-check every competing unit in the same pass. Updating only the brand that pays us would quietly make it look better. We don't do that.
We won't quote or link a store that charges more than buying direct, even if that store would pay us.

How the numbers are computed

$/kWh = regular price ÷ rated battery capacity in kilowatt-hours. It's the simplest fair way to compare a $400 unit with a $4,000 one.
Runtime = rated Wh × 85% inverter efficiency ÷ (appliance watts × duty cycle). The 85% accounts for what's lost converting battery DC to wall-style AC. Duty cycles (how often a fridge compressor or furnace blower actually runs) are shown on each wattage guide so you can check the inputs.
Sizing recommendations add 20% headroom, because running a battery to empty every time isn't realistic.
Picks filter the database by what a job needs (surge to start a motor, 240V, runtime) and then rank by value. Who pays us isn't part of the formula.

Every review says who should skip it

Each review lists cons and a "problems & complaints" section drawn from owner reports and independent tests. Each one names the kind of buyer the unit is wrong for. If a page can't tell you who shouldn't buy something, it isn't a review.

Money and independence

We earn affiliate commissions on some products. Rankings are computed before commission is considered, several top-ranked units earn us nothing, and no brand can pay for placement. We don't accept free or loaned review units. The details are on our affiliate disclosure page.

How we use AI

We use AI tools to help draft pages, gather sources and run calculations. They work inside a fixed rule set we wrote: the sourcing and pricing rules above. Every published number has to trace back to a cited source or a formula shown on the page. AI tools don't decide rankings, and an AI summary is never treated as a source.

Corrections

If we got something wrong, a spec, a price, a misattributed finding, email hello@homegridhq.com with "Correction" in the subject and a link to the page. We check it against the source, fix it if you're right, and note the date of the change. We'd rather be corrected than be wrong in public.