You can certainly get an unvented cylinder with an immersion heater built-in, because I have one (although I'd only use it as back-up in case of boiler problems).
I'd like a sealed tank with a power diverter for a solar PV system. And a solar PV system
I'd also like world peace and a lottery win.
@Grumpy_Git started
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You can certainly get an unvented cylinder with an immersion heater built-in, because I have one (although I'd only use it as back-up in case of boiler problems).