New life into an old steading — near Culloden Battlefield.

Two Vaillant 7 kW air source heat pumps in cascade. A cascade arrangement — two units sharing the load rather than a single larger unit — gives better modulation across the year: one unit handles base load efficiently, the second kicks in for peak demand and comes off when not needed. The result is a system that runs closer to its design-point COP for more of the year, with built-in redundancy if one unit ever needs servicing.

Viridian solar PV panels across the available roof area, sized to a high proportion of the property's annual electricity demand.

Solar + battery storage system handling the inverter and storage. The battery is sized to the heat pumps' evening and overnight demand profile, with smart-tariff integration so it charges from cheap-rate windows when solar is short.

Full plumbing and heating works including underfloor heating throughout the property — underfloor pairs particularly well with the cascade heat pump arrangement because the lower flow temperatures keep the COP up.

Remote access across the entire system — heat pumps, solar inverter, battery management, controls. Single login, one view of how the building is performing, and the ability to tune from anywhere.