Domestic hot water and space heating with Plentigrade PCMs

Deliver compact, efficient hot water and low-temperature heating using mid-high temperature PCMs tuned for real-world systems.

Operating temperatures & duty

Typical plateaux: 43°C, 50°C, 58°C

Charge sources: heat pumps, boilers, resistive elements, solar

PV Duty: daily cycling on DHW draw and comfort set points; off-peak charge and on demand discharge

Where it helps

Takes up less space and loses less heat than traditional hot water cylinders, thanks to high energy density PCM storage.
Shifts energy use by charging off-peak and delivering hot water when it’s needed most.
Supports heat pumps with steady thermal output, even as demand changes.
Makes better use of solar PV by storing excess daytime energy for later hot water use.

Target temperatures Best-fit PCM Typical charge sources
~43 °C P43 (salt hydrate)
  • Heat pumps
  • Condensing boiler 50–60 °C
50 °C P50 (salt hydrate)
  • Heat pump 50–55 °C
  • Boiler 60–70 °C with mixing
  • Electric element
  • Solar PV diversion
58 °C P58 (salt hydrate; variants P58o, P58e, no-nucleator)
  • Boilers & electric elements
  • High temp heat pumps
  • Solar PV diversion (element)

How do I pick the right plateau?

Select a PCM with a tight melting/freezing temperature range that matches your critical process tolerance, and always include a safety margin of at least 10-20% extra mass to account for real-world inefficiencies and potential peak loads. We can provide a quick PCM vs glycol system comparison.

Any safety or handling concerns?

Salt hydrates & clathrates are non-flammable. Organics are combustible and clearly labelled.