Guides

Guides, analysis and updates on UK electricity tariffs for heat pump and EV households.

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NIBE Heat Pump: Best UK Electricity Tariff 2026

NIBE heat pumps are built for cold-weather reliability, with SCOP ratings up to 5.0+ and strong performance well below freezing. That efficiency profile changes which electricity tariff actually saves you the most — particularly if you're running a ground source S-series model with steadier, less peaky demand than a typical air source unit. Here's what to look for in a tariff if you own a NIBE heat pump, and how to find the one that actually fits your usage.

· Ashley
Guides

DNO standing charges: why your electricity bill is higher than your neighbour's

Two households on identical tariffs with identical usage can pay different electricity bills — purely because of where they live. The culprit is the Distribution Network Operator standing charge, which varies across the UK's 14 DNO regions. For heat pump owners comparing tariffs, understanding this regional variation matters: it affects both your daily standing charge and, on some tariffs, your unit rates.

· Ashley
Guides

Samsung heat pump: the best electricity tariff to pair with it in 2026

Samsung heat pumps are widely installed across the UK, particularly the EHS monobloc and split ranges. They have capable built-in scheduling and SmartThings integration — which means they align well with time-of-use tariffs. The right tariff depends on whether you're using the built-in controller alone or have SmartThings or Home Assistant in the mix.

· Ashley
Guides

Vaillant Arotherm heat pump: the best electricity tariff to pair with it in 2026

The Vaillant Arotherm is one of the UK's most widely installed heat pumps. It's efficient, reliable, and has a mature controls ecosystem — but the scheduling flexibility you have depends on which controller you're using. That matters enormously for tariff choice: a heat pump that can schedule around off-peak windows can save £200–£400 more per year than one that can't. Here's how the Arotherm's controls map to the available tariffs.

· Ashley
Guides

Fixed vs variable tariffs for heat pump owners: which gives a lower bill in 2026?

Most fixed vs variable comparisons assume a typical household with flat usage. Heat pump owners are not typical — they use two to three times more electricity than average, most of it in winter, and a significant share is shiftable to off-peak windows. That changes the calculation considerably. A flat fixed rate competes not with the standard cap, but with the effective blended rate you'd actually achieve on a time-of-use tariff.

· Ashley
Guides

When is the right time to switch heat pump tariff? Seasonal timing and price cap dates explained

The Ofgem price cap changes every quarter — April, July, October, January. Each change shifts the off-peak rates on every variable heat pump tariff in the UK. Understanding that cycle helps you switch at the right moment, avoid locking in at the wrong rate, and know when to check whether your current tariff is still competitive. This guide explains the timing, what to watch for, and why summer is often the best time to switch.

· Ashley
Guides

How to load-shift with a heat pump: cut your electricity bill by £200–£400 a year

Time-of-use tariffs offer rates as low as 14–17p/kWh during off-peak windows — roughly half the standard cap rate of 24.7p. But you only capture those savings if your heat pump actually runs during the cheap hours. Load-shifting moves your heating and hot water consumption into those windows. Done well, it's worth £200–£400 a year on the right tariff. This guide explains how to do it, what controls you need, and what’s realistic without it becoming a hobby.

· Ashley
Guides

Heat pump hot water: when to heat your cylinder (and when not to)

Hot water is the easiest load to shift on a time-of-use tariff — and the most valuable. A 200-litre cylinder reheated during a cheap window at 14p/kWh instead of the 24.7p standard rate saves the cost difference on every single litre, every single day. This guide covers how heat pump hot water works differently from a boiler, why timing matters, and how to set a schedule that captures the saving without ever running out of hot water.

· Ashley
Guides

What is a heat pump COP? Why it matters for your tariff choice and running costs

A heat pump with a COP of 3.0 produces 3 kWh of heat for every 1 kWh of electricity it uses. At the April 2026 standard electricity rate of 24.7p/kWh, that’s an effective heat cost of 8.2p/kWh — cheaper than gas, but only just. On a heat pump tariff at 14.5p/kWh, the same system delivers heat at 4.8p/kWh — decisively ahead of gas at any plausible price. COP is the reason tariff choice matters so much for heat pump owners.

· Ashley
Guides

How to Run Your First Tariff Comparison

Once your readings are in and your region is set, a comparison shows what every tariff would have cost you against your real usage. Here's how to run your first one and make sense of the results.

· Ashley