START WITH A LITTLE KNOW-HOW

Clearer choices
start here.

Plain-language notes for your next equipment decision.

50 STATES + DC

Solar rules where you live.

Explore state rules, electric providers, and sourced credits or rebates before planning your project.

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UL · NEMA · ELECTRICAL CODES

Know what the labels mean.

Understand product listings, battery-system certification, enclosure ratings, and the documents to request.

Explore the standards

Read exact-model certificates and test scopes

See store catalog coverage and remaining gaps

01

Watts vs. watt-hours

Watts describe power: how much equipment can supply or use at a moment. Watt-hours describe energy: how much a battery can store. A larger battery does not automatically have a more powerful inverter.

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02

A battery is not always a complete system

A rack or wall battery may need a compatible inverter, protective equipment, and installation. Complete home-storage systems and expansion batteries have different roles. Start with the exact model and the manufacturer's requirements.

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03

Single panels, pallets, and quoted prices

Confirm whether a price is for one panel, a pallet, or a minimum quantity. Compare dollars per watt only when both the price basis and total rated wattage are clear. Shipping can materially change the final cost.

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04

Generator power has more than one number

Running and surge power are different. Output can also differ by fuel. Check the voltage, continuous rating, and connection requirements for the exact model before comparing equipment.

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