Sunamp Thermino in 2025?

[JohnMo]

4 minutes ago, DamonHD said:

loses heat at half the speed of the DHW cylinder

Even then with CoP of at least 3, but more like 3.5+, you still use 50% more electricity running a heat battery than UVC.

[DamonHD]

But I cannot run the heat pump at all with the dregs of PV low generation in as agile way as with diversion.  (I don't mind spilling to grid because it gets used to avoid gas burn usually at the moment.)  I also avoid diversion when grid demand or carbon intensity is high, or frequency drops to which I respond within a minute.  None of that agility is easy with minimum hp compressor cycles lengths and minimum power draw.  Starting from fresh I and given that I *do* now have a heat-pump I might use a bigger electrical battery instead.

[Cooeyswell]

Let's not be shy here,....

 

I bought a pair of Sunamp PVs in 2016 at a cost of £2k+

They failed multiple times, luckily I'm an electronics specialist and managed  to keep them going with the aid of Sunamp technical support.

In 2023 they failed again Sunamp were less helpful, I dumped them and installed an OVO unvented cylander instead.

 

That's a cost of £2k+ in 7 years. I wouldn't touch a Sunamp product again in this lifetime with anyones bargepole.

 

Ask yourself who is going to maintain your shiny new Thermino in 10years time, you can guarantee it won't be Sunamp.

Just about any plumber will be able to fix a UVC.

 

Factor this into any cost/benefit calculation you are currently making.