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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Sep 13, 2025
Profile Activity
Topics: 23 / Replies: 473
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Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks That's useful stuff. Is the 44deC supply typical? The 12degK between your supply and return water temperatures is revealing. That suggests to ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@cathoderay Yes, understood. My home heat loss estimate for the current weather averaging -1degC outdoor air temperature is 6kW or 144kWh per day. Add...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Safety precautions - lithium solar PV storage batteries indoors

@editor thanks Mars. Both the Growatt hybrid charger and inverter are fully metal clad to quite a decent IP level, most high end batteries are. I'll t...

3 years ago
Forum
Energy Storage
Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks a low loss header is a form of buffer, but also hydraulically decouples the primary and secondary sides of the system. They increase the syste...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks - the Grant Aerona controller has some basic user level parameters you can check including power consumption in W, flow and return temperature...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 17kw Grant Aerona heat pump not performing

@cathoderay you're right, and my explanation is a bit confusing. I've seen my Grant ASHP spend a lot to time in defrost recently and it does tend to m...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Safety precautions - lithium solar PV storage batteries indoors
3 years ago
Forum
Energy Storage
Replies: 15
Views: 8100
Reply
RE: 17kw Grant Aerona heat pump not performing

@soniks, so sorry to read this. All ASHPs in the UK at the moment will be routinely cycling into defrost. The compressor switches off and the system r...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

@lucgw you are welcome. Many of us are learning as we go. I can't help but notice there's no pipework insulation on any of that Grant install. Is the ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

@lucgw Hi there, I'm relatively new to ASHP with a 10kW Grant Aerona3 ASHP and 250L pre-plumbed grant cylinder. I'm sitting at around 32-36kWh per day...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: What's your current daily damage?

140m2 and heated background circa 18degC daytime 16degC night time. Grant Aerona3 on 24/7. Currently about 24kWh per day for heating and DHW (45degC s...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: -5c this weekend – what's your heat pump strategy?

Weather Compensation set to OEM standard, and ASHP left running 24/7. First really cold test for the Grant Aerona 10kW. -4degC air = +45degC water. A ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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