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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Aug 5, 2025
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Topics: 17 / Replies: 2073
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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...

1 year ago
Forum
Your Home
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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...

1 year 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...

1 year ago
Forum
Solar Photovoltaic (PV)
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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 ...

1 year 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...

1 year ago
Forum
Solar Photovoltaic (PV)
Reply
RE: My horrific Samsung heat pump installation and experience

Once you get the hang of it, it isn't complicated. This is a very simple unadorned example that gets data from my minute data csv file and plots it: ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My horrific Samsung heat pump installation and experience

@iantelescope - date-time formats can be very tricky, especially with software that likes to be 'clever' - and then gets, for example, month and day m...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My horrific Samsung heat pump installation and experience

If you can log the data to csv files (eg using python), then you can plot the data any which way using any spreadsheet. You can also use python plotti...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Electricity use

There are a number of threads on this forum, some very detailed, that cover energy and/or electricity use (both matter, and of course they are related...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Real world connection to a heat pump over modbus

@mosibi - thanks for your contribution, looks like an interesting project! However, it does tie the user to using your hardware, ESPHome and Home Assi...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

Yes, as has been all my OAT data to date, meaning charts are comparable, as in showing the same data from the same sensor. I do now have an outdoor ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

Continuous running: weather compensation (room stat at 26 ie 'always on'); setbacks timed by turning the room stat down to 12 degrees between 2100 and...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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