We replaced the oil boiler that previously supplied heating and hot water
for this detached house with a 12kW air source heat pump. At the same
time we installed a 6.48kW PV array to help to offset some of the
additional electricity consumed by the heat pump, with any surplus
diverted to an energy storage system (ESS).

Our heat loss analysis showed that an 12kW NIBE F2040 heat pump would
match the peak heating and hot water load without any alterations to the
existing wall-mounted radiators. The heat pump is mounted on a plinth
~2m from the house and connected via a short length of pre-insulated
Solarflex. We decommissioned the existing vented hot water cylinder and
replaced it with a 300L NIBE Megacoil mains pressure hot water cylinder.

The PV array comprises 16 JA Solar 405W monocrystalline modules
mounted across three south east and south-west facing roofs. These are
connected to a single 6kW Solis hybrid inverter which is DC-coupled to a
10.65 kWh Pylontech L2-Force modular battery.

The heat pump and the inverter are each remotely monitored via online portals.