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The guides
The questions people actually ask. Sparky's short answer first, then the Engineer's working. Every figure is sourced and dated on the guide itself.

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Solar SafetyWhat actually goes wrong, what a safe installation looks like, and what to check on your quote.Live
Home EV ChargingTethered or untethered, can your main fuse cope, charging from Solar, and who can still get a grant.Live
The 5:1 RuleFive minutes a day: four standby checks, three settings, two loads and one sweep. No new kit, no spend.Live
The Performance GapHeat Pumps, designed against measured: what the Government's own field trial found, read by an Engineer.Live
Scam AlertsFree grants, “government” callers and “last chance” deadlines: the red flags, and where to report one.Live
On the bench
Coming next
BoilersSizing, quotes, what to askSoon
InsulationThe right order of worksSoon
Grants & schemesWhat's real, what's closingSoon
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I'll check it as a person, not a computer, for free. A one-page report, green, amber, red, and the questions to ask your installer.
— Darren Emery, Engineer