Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Apr 4, 2026
@scalextrix As @JohnMo says though at lower temperatures they need to be bigger so that will probably be the worse performing one in the CH. Also they...
@scalextrix I cant help with the CH side but you might look at the plate heat exchanger used with a mixergy cylinder to get a handle on the DHW. By al...
@chandykris Thats a fair point and something Ive considered. I do keep one eye on ebay for any reduced price battery packs 🙂 Can you post the figu...
@chandykris We seem to have similarly sized systems and yes I found Go to be a better choice than cosy with a couple of minor months difference. I r...
@editor not via the WC curve but as @old_scientist mentioned the setting is in the FSV menu so I was able to set that to 19C rather than it’s default ...
@editor Thanks Mars. Interesting talk. I will just point out however I don’t actually run my heat pump at 40C when it’s 17C outside! Don’t know why I ...
@cbrenewable Your COP does appear very low and if you don’t have a buffer that rules out one possible cause. The only thing that stands out as unusual...
@judith that’s interesting as my calculations suggested a smaller battery that didn’t last the day was more cost effective for me. I couldn’t even mak...
Hi. You would probably need to swap the inverter for a hybrid inverter. That would support battery charging. However I would look into the cost v payb...
@sandman1600 I’ve been following this thread and although I understand your misgivings there is no way swapping an oversized heat pump for a smaller o...
Hi Alistair. I’m not an engineer but it sounds as if your analysis is correct to me. Perhaps others will be able to confirm. A replacement like for...
@ashp-bobba @old_scientist thanks both. Very useful.
Latest Posts
-
RE: Anyone concerned about GivEnergy?
Yes and no. Native controllers generally do a good jo...
By Majordennisbloodnok , 4 hours ago
-
RE: A2A vs A2W: Which Heat Pump Would You Pick?
@temperature_gradient I've had air-to-air for just over...
By Anne Smith , 9 hours ago
-
RE: Home automation and the cloud; is there a better way?
+1 It's not just cloud though. Many devices have repla...
By bobflux , 10 hours ago
-
RE: End-of-Life Heat Pumps: How Do You Dispose of an ASHP in the UK?
We've started to document everything, and part 2 of the...
By Mars , 15 hours ago
-
RE: Summer usage. Why is my Vaillant Aerotherm using so much energy on "heating"?
So the red bars are 'DHW' and the yellow bars 'heating'...
By JamesPa , 16 hours ago
-
Its good kit the Midea and significantly cheaper, you w...
By ASHP-BOBBA , 20 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
Have you tried cutting the grid feed to see what actual...
By JamesPa , 20 hours ago
-
Contractors pack for inta antifreeze valves are around ...
By ASHP-BOBBA , 20 hours ago
-
RE: Renewables & Heat Pumps in the News
Critics and naysayers will be negative whatever the gov...
By JamesPa , 20 hours ago
-
RE: Microbore heat pump installs
In principle you are almost certainly right, but in pra...
By JamesPa , 1 day ago
-
RE: Electricity price predictions
@old_scientist We are a low mileage home, so bulk of ou...
By ChandyKris , 1 day ago
-
There are just too many unknowns for me to comment on p...
By Transparent , 1 day ago
-
RE: What is the main ‘dictator’ of Agile’s unit price?
@toodles I keep an eye on wholesale prices and energy m...
By ChandyKris , 1 day ago
-
RE: Brand and installer questions for ASHP
Strange, perhaps it doesnt use modbus which the third p...
By JamesPa , 1 day ago
-
RE: Upgrading my system, how far do I go?
For comparison, my PW3 with 11.04kW inverter, will char...
By Old_Scientist , 2 days ago
-
RE: Changes to Tesla Powerwall Charging Regime?
Elon gate - legendary! I take my hat off to you @toodle...
By Old_Scientist , 2 days ago
-
RE: Mitsubishi Ecodan not good enough ?
Thanks @goody, appreciate the feedback and sorry you ha...
By marcexec , 2 days ago
-
RE: Minimum and Zero Disrupt Heat Pump Installations
True (first sentence) Thats the reason to consider th...
By JamesPa , 3 days ago
-
RE: High air source heat pump running costs – Vaillant AroTherm Plus
Quite right. I was using a rough guesstimate of doublin...
By Majordennisbloodnok , 3 days ago
-
RE: My Grant R290 9kW Heat Pump Installation
Again, really don't know how accurate this is! &nb...
By petch , 3 days ago
-
RE: MCS Quality Audit – Has Anyone Had One? Did It Lead to Remediation?
@toodles The whole scheme is a shocking waste of money....
By Papahuhu , 3 days ago
-
RE: DIY or Don’t Touch? Solarman Smart Meter Install
Yes, and these guys would probably be my preferred inst...
By Batpred , 4 days ago
-
RE: Hot water tank lose heat rapidly on random days
@jamespa Hopefully their reasons are well intended! ...
By Bash , 4 days ago
-
RE: Ecoflow UK Support & Info Thread
As mentioned above, we’ve got our full review of the Ec...
By Mars , 4 days ago
