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robl
@robl
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Honorable Member
Joined: Mar 23, 2022
Last seen: Dec 4, 2025
Profile Activity
Topics: 1 / Replies: 206
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RE: Battle of the charging technologies

We have a V2G wallbox, for our leaf, on a trial with Ovo. So far as I’m aware, there are just a few small scale trial V2G to date similar to ours, us...

4 years ago
Forum
Renewable-powered transport (EVs & e-bikes)
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RE: Anyone want to share costs on batteries?

We have 4kWp of (mcs) solar, and subsequently a V2G unit by Indra for which there is a G99 A1-1 form stating the overall export is <16A per phase, ...

4 years ago
Forum
Energy Storage
Reply
RE: Ice Energy Step Controller Settings

Hi Alan Do you have an EPC, does that agree with the 45MWh/year heating + DHW? Has your electricity consumption been similar after the units wer...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Arotherm Plus issues - circulation, efficiency and performance

I suspect it is very common for installers to avoid using weather compensation, and instead set a constant high flow temperature. It makes for a quic...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized ASHPs & Unbelievable energy bills

@cathoderay You could try turning all rad TRV's off except one, confirm that one works as expected, move through them all one by one? Our plumbin...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized ASHPs & Unbelievable energy bills

@cathoderay Great the PHE seems to be ok! Any pipes outside clearly need to be lagged, but indoor ones probably not. Any pipework inside the ther...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized ASHPs & Unbelievable energy bills

If you have a PHE, then there will be a temp drop between the two separate liquids, and this temp drop is what pushes the heat flow from one liquid to...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized ASHPs & Unbelievable energy bills

Usually heat exchangers used in plumbing are bphe (brazed plate heat exchangers). They have two connections at each end, and should always be used in...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized ASHPs & Unbelievable energy bills

@howiewsl There seem to be two issues: £5 a day It's not warm enough Taking the first of these - 'since you've a 5p/24p tariff, the number of...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized ASHPs & Unbelievable energy bills

It’s a lot simpler to spec a gas boiler than an ashp. While there are similarities - modern examples of both have huge modulation ranges, so don’t ju...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat recovery systems

We had a vent axia HR25 for a few years, it worked quite well. It's a fan replacement unit, with heat exchanger - there are quite a lot on the market...

4 years ago
Forum
Well & Truly Off The Grid
Reply
RE: Undersized ASHPs & Unbelievable energy bills

I'm sorry you're having trouble with it, I hope it can be made to work better. Apologies in advance for a flood of questions, which hopefully will he...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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