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Free guides and articles to help New Zealand homeowners make smart energy decisions.
PoweredNZPoweredNZPoweredNZPoweredNZFree guides and articles to help New Zealand homeowners make smart energy decisions.
Focused reads on specific topics — subsidies, brand comparisons, regional advice, and more.
Hot water is about a third of your power bill, and winter bills just rose 8%. The real NZ 2026 maths on switching from an electric cylinder to a hot water heat pump.
July 21st, 2026
Hot Water Heat PumpsEV road user charges began 1 July 2026, adding $76 per 1,000km to running costs. Here's whether a home charger still pays off — and how off-peak charging keeps EVs ahead of petrol.
July 13th, 2026
EV ChargersFrom 1 July 2026 big NZ retailers must offer time-of-use power plans. Here's how to run your heat pump around the peak windows this winter — and who actually saves by switching.
July 1st, 2026
Heat PumpsFrom 1 July 2026, big NZ retailers must offer time-of-use plans and time-varying solar buy-back rates. Here's what actually changes — and the 'mandate' myth to ignore.
June 26th, 2026
SolarWhat financial help you can actually get for a hot water heat pump in NZ 2026 — the $1,000 EECA rebate's tightened rules, why Warmer Kiwi Homes won't cover it, and who should switch now.
June 17th, 2026
Hot Water Heat PumpsWarmer Kiwi Homes added up to 300,000 middle-income homes to its insulation grants in 2026 via a new 50% tier. Here's whether you now qualify and what you'd pay.
June 10th, 2026
InsulationPower prices are up and NZ winter has started — but dehumidifiers draw 300–700W and run for hours. Real model-by-model running costs, plus when to switch them off.
June 1st, 2026
VentilationWhat a hot water heat pump really costs to run in NZ winter 2026 — household-by-household maths on the post-May tariffs, plus the COP drop nobody warns you about.
May 29th, 2026
Hot Water Heat PumpsStandard heat pumps lose efficiency in frost. Here's which cold-climate models hold output below 0°C in NZ, what the premium costs, and where it's worth paying.
May 25th, 2026
Heat PumpsBidirectional EV chargers are finally available in NZ — turning your car into a 60 kWh home battery. Here's what V2H actually costs installed, which cars work, and the honest payback.
May 18th, 2026
EV ChargersThe Electricity Authority's new 10kW solar export limit kicked in 11 May 2026. Here's what it actually changes for new NZ solar buyers and existing system owners.
May 15th, 2026
SolarPower prices are up and NZ winter is starting. Draught stopping is the cheapest fix homeowners can do this weekend — here's what works, what to skip, and the real payback.
May 13th, 2026
InsulationNZ's May power hikes have homeowners asking if their HRV, DVS or Smartvent is worth running through winter. Real wattage, real $/year, and the settings to fix first.
May 11th, 2026
VentilationPower prices jumped this month but EV off-peak rates didn't. The gap between flat-rate and EV-specific plans just widened. Here's which NZ retailer is actually cheapest in 2026.
May 8th, 2026
EV ChargersPower prices jumped this month but solar buy-back rates didn't. That's the gap a battery fills. Here's the honest maths on solar batteries in NZ for winter 2026.
May 4th, 2026
SolarWhat a heat pump actually costs to run in NZ winter 2026 — by unit size, against the new post-1 May tariffs, plus settings and sizing that cut the bill.
May 3rd, 2026
Heat PumpsWall insulation in NZ costs $3,000–$8,000 retrofit and isn't covered by Warmer Kiwi Homes. Here's what works, what to skip, and whether to do it before winter 2026.
April 29th, 2026
InsulationWindow condensation hits NZ homes hard each winter. Here's how to diagnose your moisture problem, fix it for free, and decide when ventilation is worth the spend.
April 27th, 2026
VentilationNew RMA rules make home EV charger installation easier in 2026. Here's what it costs, what changed, and which NZ electricity plan saves you the most.
April 25th, 2026
EV ChargersAll five major NZ banks offer 0–1% green top-ups for heat pumps, solar, insulation and EVs. Compare rates, caps, terms and the catches for each — plus how to stack with Warmer Kiwi Homes.
April 14th, 2026
Multi-CategoryThe WKH subsidy programme changed in 2026. Here's what's covered, who's eligible, and how to apply through a registered installer.
April 10th, 2026
Heat PumpsGot $10K to spend on your NZ home? Four real scenarios showing exactly where the money goes for maximum warmth, dryness, and savings.
March 30th, 2026
Multi-CategoryHot water heat pump or gas califont — which costs less to run in NZ? Real running costs, brands, and why the maths have changed.
March 28th, 2026
Hot Water Heat PumpsHow long does solar actually take to pay back in New Zealand? Real numbers by region, honest scenarios, and what changes the equation.
March 25th, 2026
SolarPositive pressure or balanced HRV ventilation — which system fixes your damp NZ home? Costs, brands, and honest advice for different home types.
March 23rd, 2026
VentilationCeiling or underfloor — which insulation should NZ homeowners tackle first? We break down costs, R-values, subsidies, and the honest answer for your home.
March 20th, 2026
Insulation