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Cosy Octopus explained: is it the best tariff for a heat pump in 2026?

A deep-dive on Cosy Octopus for heat pump owners in 2026 — how the three-rate structure works, the peak-rate trap, worked examples for three households, and a clear verdict on who it suits.

EDF FreePhase vs Octopus Agile: which dynamic tariff is better for a heat pump?

EDF FreePhase and Octopus Agile are both dynamic tariffs, but they suit different heat pump owners. How each works, a side-by-side comparison, worked examples, and a clear verdict on which is better for a heat pump.

How much does a heat pump cost to run in 2026? Real data from UK households

A data-led look at real heat pump running costs in 2026 — three household profiles, five tariffs compared, the efficiency and standing-charge factors that matter, and a five-minute way to estimate your own bill.