A 2014 SunnyBoy inverter had been progressively under-performing since 2022. Three optimisers were also offline.
System size
Existing 4 kWp
Annual saving
£900 generation recovery
Payback
N/A (maintenance work)
Maintain FiT registration (worth £350/year on this system). Like-for-like replacement required, no upgrades that would void contract.
SMA SunnyBoy 4.0 like-for-like swap. Replaced 3 dead Tigo optimisers. Re-registered system with Ofgem (FiT meter unchanged). Cleaned panels under bird mesh.
Generation back up to 4,100 kWh/year (from 3,200). System now carries our 5-year workmanship warranty in addition to inverter's 10-year warranty. FiT contract preserved.
32 kWp
A working dairy farm needed daytime solar for milking parlours and battery to time-shift evening loa…
18 kWp
A 4-site coffee shop group wanted solar at their flagship Manchester café for sustainability marketi…
120 kWp
Logistics warehouse with 22 staff EV chargers needed solar to offset both building load and fleet ch…
Free survey, fixed-price quote, written PV*SOL projection.
Tell us your postcode and what you have. A real engineer reviews it and comes back within one working day with an honest answer — including when the answer is "leave it alone".
