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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 22, 2025
Profile Activity
Topics: 17 / Replies: 2164
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Reply
Installing a heat pump in a Grade II listed property

I have some experience with Grade II listed buildings and heat pumps. Three general points: (1) ASHPs do work OK in listed buildings (buildings a...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: PV Inverter - monitoring and control using Modbus & RS485

OK, I got that wrong, but you do have a bias - towards All I am saying is that in a forum we are not writing balanced impartial reports, we are d...

2 years ago
Forum
Your Home
Reply
RE: PV Inverter - monitoring and control using Modbus & RS485

And why not: this is a forum, and forums are places for debate, and debate means two or more parties putting their case on the table. I'm not trying t...

2 years ago
Forum
Your Home
Reply
RE: PV Inverter - monitoring and control using Modbus & RS485

@majordennisbloodnok - I'm not in the business of telling anyone they must do something a particular way, but I am in the business of saying there are...

2 years ago
Forum
Your Home
Reply
RE: Real world running cost estimate for 20KW ASHP

The ideal is to go for for something that just exceeds your heat loss at design temp (-2 or thereabouts depending on where you are) when running at th...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: PV Inverter - monitoring and control using Modbus & RS485

@editor - Mars, don't worry, I wasn't in any way put out, just wanted to plug some of the reasons why I think modbus has a lot to offer!

2 years ago
Forum
Your Home
Reply
RE: Real world running cost estimate for 20KW ASHP

Sadly, this sort of nonsense is all too common. At one point I very nearly issued a decree that if any employee of a certain heating company were seen...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: PV Inverter - monitoring and control using Modbus & RS485

Don't forget I have been talking about it for ages! It has many advantages. It is (if your heat pump/inverter/whatever has a modbus interface, which m...

2 years ago
Forum
Your Home
Reply
RE: Real world running cost estimate for 20KW ASHP

A 20kW ASHP to supply a 13.22kW demand seems a bit on the high side, even allowing for the fact most heat pump suppliers inflate their rated outputs b...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Local monitoring and control of inverter - gaps in understanding

Great, you must be very pleased! I'm also sure others will welcome a separate thread with details of your wider setup, and a slightly different emphas...

2 years ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Local monitoring and control of inverter - gaps in understanding

@majordennisbloodnok - my hunch is that it is the device address. This can be a gotcha - you can't ask it what it's device address is without knowing ...

2 years ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Local monitoring and control of inverter - gaps in understanding

@majordennisbloodnok - cripes, it sounds complicated! At its simplest, a modbus connection is just two wires, A to A and B to B, plus (optionally) a...

2 years ago
Forum
Solar Photovoltaic (PV)
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