Qmerit | Battery Storage Archives | The Cool Down

Rooftops of houses with solar panels against a bright blue sky with a few clouds.

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UK homeowner says installer told them batteries 'aren't worth it' — now they want retrofit storage

A wall-mounted electrical system with batteries and control units in a wooden structure.

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Homeowner asks about mixing solar batteries, and replies point to the spec sheet first

A modern house with solar panels surrounded by greenery and a parked electric car.

Tech

Tesla opens Powerwall 3P orders in Portugal, extending its European rollout

A wall-mounted electrical box with a control panel and connected wiring in a garage.

Home

Homeowner asks about putting a 5-kWh battery outside, learns code, spacing, and heat matter

A hand touches a white radiator attached to the wall.

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UK homeowner learns gas radiators may not keep working when the lights go out

Two Tesla powerwall battery storage units mounted on a wall alongside electrical equipment.

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Aging Tesla Powerwalls left homeowner juggling a warranty fight and a basement code deadline

A wall-mounted inverter and battery unit.

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Can battery-only storage pay off in the UK? Homeowners say tariffs make or break the math

A battery unit with control panel and various connectors displayed on a stand.

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Is 5 kWh enough? UK owners say winter often means topping up from the grid

A person in a motorized wheelchair showing off a home battery system.

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Florida quadriplegic says home battery could 'literally save my ass' in a hurricane outage

Off-grid solar panels.

Home

UK solar owner asks where excess power goes off grid, learns gateway nudges inverter offline

A Tesla Cybertruck parked in a driveway next to a brick house.

Tech

Tesla turns Cybertruck into a home backup battery, but only for owners with Powerwall 3

A row of energy storage units mounted on a wall with horizontal siding.

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Solar owner says batteries made no sense, then learns VPP can pay nearly $1,000 a year