I got the impression from your initial post that all you wanted was the electrical consumption. However, it now sounds very much as if you actually need a Heat Pump Monitor so that you can also have a measure of the heat generated. Have you seen this: Cascading / multiple heat pump setting ?
Although The Shop website makes it very clear that the forum here is the primary source of support, in fact the price you pay for the heat pump monitor includes support direct from The Shop, so I really think that while others here, like @Timbones who’s just started to type something, can tell you about their systems, the actual configuration will need to involve Glyn & Trystan.