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Grant Aerona3 - Home Assistant control via Modbus

Grantmethestrength · 2025-03-28T13:46:36Z

Good afternoon all, I have finally got around to documenting my journey in getting around the woeful controls that the destroyers installers installed when they put in my ASHP. I have used a Waveshare POE ethernet to modbus converter and now have full remote control of my ASHP. The next stage of my project is to build a self hosted AI agent probably using Mistral, N8N and MCP in order to create my own version of a Homely type controller. If this floats your boat then I commit to thee:If you want to join in the fun let me know and I will happily share everything with you as I continue this journey. Kind Regards Si

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Air Source Heat Pumps (ASHPs)

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JamesPa

(@jamespa)

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14/05/2025 6:24 pm

Posted by: @johnmo

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Posted by: @uk_pete_2000

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That means I only start and run the compressor once, not 2 or 3 times a hour.

In the grand scheme 2 or 3 starts an hour is good. It's what it's designed to do. During the cycle it just maintaining floor temp.

If you never let it cycle you will never get WC to work, that's maybe why you make the sweeping statements that WC can work.

Mine is currently cycling about twice per hours and it's just doing what they are designed to do.

I find it faintly amusing that nobody ever worries about a heat pump cycling more or less continuously when it's their fridge, but gets extremely concerned when their heating cycles for some of the time

This post was modified 4 hours ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.

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Johnmo

(@johnmo)

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Posts: 503

14/05/2025 6:46 pm

I was looking at electricity usage the other day and the heat pump dryer was on, that cycles also.

This post was modified 34 minutes ago by Mars

Maxa i32V5 6kW ASHP (heat and cooling)
6.5kW PV
13.5kW GivEnergy AIO Battery.

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Grantmethestrength

(@grantmethestrength)

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Joined: 3 months ago

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Topic starter 14/05/2025 6:49 pm

My dryer cycles, one day of sunshine at least once a year got to love Wales!

Kind Regards
Si
——————————————————————————
Grant Aerona3 13kW
13 x 435w Solar Panels
Solax 3.5kW Hybrid Inverter

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Mars

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14/05/2025 10:15 pm

Posted by: @jamespa

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I find it faintly amusing that nobody ever worries about a heat pump cycling more or less continuously when it's their fridge, but gets extremely concerned when their heating cycles for some of the time

Difference is I’m actively encouraging as much cycling as possible on our dreadful Samsung fridge in the hopes it gives up completely, so we can finally justify replacing it with something decent.

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
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