Is my water heater compatible with the Calypso controller?

The Calypso controller is compatible with electric water heaters up to 20.8 A at 240 V. To verify compatibility, calculate the amperage (Power ÷ Voltage). For example, 4500 W ÷ 240 V = 18.8 A, compatible. Consult the manufacturer’s technical specifications or tables. The device is not compatible with heaters exceeding 20.8 A. If in doubt, contact a qualified professional.

The Calypso smart water heater controller is compatible with electric water heaters with a maximum current of 20.8 A at 240 V.

How to check compatibility?

To determine if your water heater is compatible, calculate its amperage using the following formula:

Amperage = Power ÷ Voltage

Example :

4500 W ÷ 240 V = 18.8 A (compatible)


Other ways to check

If you want to validate in addition to the calculation:

  • consult the technical specifications of your water heater;
  • or refer to the manufacturers’ specification tables, for example:
    • Giant (page 6)
    • Rheem (page 2)

Important: If your device’s amperage exceeds 20.8 A , it is not compatible with the Calypso controller. If in doubt, consult a qualified professional .

Product models associated with this article:

  • RM3510WF, RM3500WF, RM3500ZB

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