This has been discussed here:
At $150/each they seem like a good outdoor solution for pool/pump switches but the energy monitoring integration would be better handled, IMHO, by adding another Sense Solar … which works out at $175 per 240V circuit. If you are the type of user who wants 240V high-amp energy monitoring & switching then I suspect you also start to push the limits of processing power on your main Sense with 120V smartplugs.
I get the feeling Sense would consider integration if, say, Wemo or TP-Link made a Z-Wave-less 240V high-amp version of their existing smartplugs. The motivation to integrate (for Sense) is (much) less about switching control and (much) more to get high-resolution energy data (>=1/2s samples) that would be sufficient to improve the Sense dataset to the point where the smartplug is unnecessary!
BTW: I have a second Sense on my 208V 4kW hot water tank which is a Rheem with their EcoNet controller (wifi) so I can switch it on/off & change temp etc.