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Backup and off-grid power, explained

Power that stays on when the grid doesn’t.

Plain explanations, honest buying guides and real owners’ systems, for people building their own backup or off-grid power. Every figure is checked against the maker’s datasheet or a primary document.

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A suburban home with rooftop solar panels and a wall battery at golden hour.

Field note No prices. No scores. Just what works, checked against the makers’ own documents.

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Pick the situation that sounds like yours.

Big loads and well pumpsMotors, compressors and the start-up surge that decides which… Home backupKeep the fridge, the well pump and the Wi-Fi running when the grid… Off-grid livingA system that never depended on the utility: cabin, homestead or… Winter sunSize for your worst month, not your best.

Start here

4 guides, in order.

Off-grid vs hybrid vs grid-tied solar: how to decide The one decision everything else follows from. Three questions, in order, plus what net… How to choose a solar inverter: five questions before you compare models Answer these first. The right EG4 family usually falls out of your answers, and the… Solar battery sizing: how much battery do you need? Size it from your loads and the outage you want to ride out, not from a brochure. Two… Buying solar equipment online: questions to ask any seller Stock, freight, delivery day, returns, warranty and payment. What the rules say, what…

Do the maths

Small calculators that use the numbers printed on the datasheets, and show their working.

How long will my house last?Battery runtime for your own appliances.Open → System sizing helperWhich inverter, and how many batteries, cover your day and your biggest load.Open → Solar by ZIP codeMonth-by-month production, with the worst month highlighted.Open → EG4 catalogEvery model’s headline specs, with a side-by-side compare tool.Open →

The physics, plainly

Short explainers. One idea each.

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Real systems

Owners tell what they built, what broke and what they would change.

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Send photos and a few lines. We interview you and check the technical parts before we publish anything.

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Six questions before you pay anyone

  • In stock, or on backorder?
  • Freight: liftgate, residential delivery, damage claims?
  • Return window and restocking fee?
  • Who handles the warranty — the store or the maker?
  • Will someone review my wiring plan?
  • Is the battery confirmed compatible with the inverter?

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How we work

What you can hold us to.

A day with solar

Where the power comes from, and where it goes

Panels make power while the sun is up, a battery holds some of it for the evening, and the house draws on both. Start with the decision that shapes everything else.

Off-grid, hybrid or grid-tied?
Fact-checked at publishing Every figure is compared with the maker’s datasheet or a primary document, and the check date is on the page. Reviewers named only when real A page lists a human reviewer only after a real person has signed it off. No prices, no scores Nothing here goes stale. Specs link to the maker, prices to the store. Primary documents first Datasheets and manuals for equipment; government and standards bodies for physics and rules. Owner stories verified We interview every owner and check photos before we publish. Corrections in the open When we get something wrong, the fix and the date go on a public log.

Topics

Batteries Big loads and well pumps Buying online Home backup Inverters Off-grid living Sizing Winter sun

Shopping around?

Renewable Outdoors review: what the company says and what buyers reportA fair read of the public record: the company's own policies, the ratings sites, and… Signature Solar reviews: what the company says and what buyers reportA fair read of the public record: the company’s own policies, the ratings sites, and… Current Connected review: what the company says and what buyers reportA fair read of the public record: Current Connected's own policies and what buyers say… Off Grid Stores review: what the company says and what buyers reportA fair read of the public record: the company's own policies, the ratings sites, and…