Yeah that’s correct I have 2 Sunamp units. The 1st one is an iPV unit (ie runs off an MyEnergi Eddi for PV diversion and also the option of off-peak boost over-night during winter / now automated).
This unit was initially used to pre-heat HW feeding into a combi-boiler. This worked perfectly satisfactorily.
But then we wanted to fully electrify our heating so we installed an ASHP in April last year. The ASHP feeds a 2nd Sunamp at 56C for the HW cycle.
So the final set up is Sunamp iPV pre-heating hot water which then flows through (in series) the 2nd ashp connected Sunamp to provide the balance of the HW storage. All in all it works and provides a compact solution.
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