Case Study – William Birkett Dairy Farm, Stranraer
“The system is working brilliantly; phase 2 will start shortly and we’re also about to get it for the farmhouse” – William Birkett.

Unlike other solar panels, Soltropy’s award-winning design doesn’t need antifreeze and directly heats water. This means systems can be oversized to maximise energy collection in the cooler months and be allowed to overheat in summer. Phase 1 was installed at Craigencrosh in January 2019 and has proven itself in freezing as well as overheat conditions.

Save Money with Solar Water Heating

  • Income/save £3,514 per year on 24kWp (th) system.
  • 5% loans available.
  • Guaranteed subsidies for 20 years.
  • Converts the sun’s free energy into zero carbon heat.
  • Three times more efficient than electricity producing panels.
  • Can freeze without damage – no need for antifreeze.
  • Simple and robust.
Installed Capacity 24kW thermal
Energy Yield 13,308 kWh
Installed cost £19,000
Energy savings per year £2,053
Income from subsidies (RHI) per year £1,461
Total income/savings per year £3,514
Payback 5 – 6 years
20-year IRR 20%

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