Solar & Thermodynamic Water Heating Advice & Installation Support

Solar thermal and thermodynamic panels can reduce the energy used for domestic hot water in suitable homes. EvoHome Improvements helps homeowners across Hampshire and the South think through whether either is realistically appropriate — roof orientation and pitch, available roof or wall area, existing hot water cylinder (twin coil vs replacement), control integration, household hot water demand, and how the system pairs with existing gas, oil, electric or heat pump heating.

EvoHome Improvements advises and coordinates — independent vetted MCS-accredited specialists carry out heat-loss/hot-water sizing and physical installation. We do not quote fixed prices, exact timescales, guaranteed savings, guaranteed grant outcomes or guaranteed year-round hot water performance without a proper assessment.

Thermodynamic water heating systems (often marketed as Solar Assisted Heat Pumps) use refrigerant-filled panels to absorb ambient heat from air, rain, and even moonlight — producing domestic hot water year-round regardless of direct sunlight. This makes them particularly effective in the UK climate.\n\n## How They Differ from Solar Thermal\n\nUnlike solar thermal panels that rely on direct sunlight, thermodynamic panels work by absorbing ambient energy.

They operate effectively in temperatures as low as -15°C and during rain, cloud, and darkness. This means consistent hot water production throughout British winters — a significant advantage over solar thermal systems that drop to near-zero output in December and January.\n\n## Typical Performance\n\nA well-installed system can provide 100% of a household's hot water needs for 2–4 people, heating a 200–300 litre cylinder in 2–4 hours.

Running costs are typically £150–£250 per year, compared to £400–£600 for a conventional electric immersion heater.\n\n## Installation Considerations\n\nPanels can be wall or roof-mounted, ideally in a position with good air circulation. The system requires a compatible hot water cylinder and electrical connection. Installation typically takes 1–2 days with minimal disruption.

\n\n## Hampshire Climate Advantage\n\nHampshire's moderate maritime climate, with average temperatures rarely dropping below -5°C, is ideal for thermodynamic systems. The frequent rain and cloud cover — often seen as disadvantages — actually provide consistent ambient energy for the panels to absorb.