# Latest **URL:** https://community.openenergymonitor.org/latest.md?page=1 [Latest](https://community.openenergymonitor.org/latest.md) · [Categories](https://community.openenergymonitor.org/categories.md) · [Tags](https://community.openenergymonitor.org/tags.md) **Page:** 2 --- ## [Request for brine temperature data from ground-source HeatPumpMonitor systems](https://community.openenergymonitor.org/t/request-for-brine-temperature-data-from-ground-source-heatpumpmonitor-systems/30290)
**Author:** [@mcolahi](https://community.openenergymonitor.org/u/mcolahi)\ **Replies:** 6\ **Last updated:** [30 September 2026 09:36 UTC](https://community.openenergymonitor.org/t/request-for-brine-temperature-data-from-ground-source-heatpumpmonitor-systems/30290 "2026-09-30T09:36:16Z")
Hello everyone, I am a doctoral researcher using public HeatPumpMonitor data to validate thermodynamic heat pump models. I am looking for ground- or water-source heat pump datasets that include source-side measurements… --- ## [Poor contrast / nearly invisible axis labels in dark mode (Emoncms graphs)](https://community.openenergymonitor.org/t/poor-contrast-nearly-invisible-axis-labels-in-dark-mode-emoncms-graphs/30352)
**Author:** [@hph](https://community.openenergymonitor.org/u/hph)\ **Replies:** 5\ **Last updated:** [30 September 2026 07:44 UTC](https://community.openenergymonitor.org/t/poor-contrast-nearly-invisible-axis-labels-in-dark-mode-emoncms-graphs/30352 "2026-09-30T07:44:11Z")
Hello everyone, I’ve noticed a recurring display issue in Emoncms: when using a dark theme or background, the axis labels are rendered in a color that is almost black, making them extremely difficult (or nearly impossib… --- ## [Time requests?](https://community.openenergymonitor.org/t/time-requests/30366)
**Author:** [@Umski](https://community.openenergymonitor.org/u/Umski)\ **Replies:** 3\ **Last updated:** [30 September 2026 07:43 UTC](https://community.openenergymonitor.org/t/time-requests/30366 "2026-09-30T07:43:02Z")
Hello folks, Hoping someone can help - I’m a long time user of the emonTXv3, NanodeRF, GLCD setup - old school I know but it works and has been for 10+ years now albeit with a small tweak for adding a battery a few year… --- ## [Samsung gen 6 control unit connected to Alpha hydro 5kw on heat only](https://community.openenergymonitor.org/t/samsung-gen-6-control-unit-connected-to-alpha-hydro-5kw-on-heat-only/30367)
**Author:** [@zameer\_farid](https://community.openenergymonitor.org/u/zameer_farid)\ **Replies:** 0\ **Last updated:** [29 September 2026 22:24 UTC](https://community.openenergymonitor.org/t/samsung-gen-6-control-unit-connected-to-alpha-hydro-5kw-on-heat-only/30367 "2026-09-29T22:24:00Z")
I have recently come across a house builder in the south who has connected the alpha hydro 5kw with a Samsung Mim-e03en. It fired up and works. The reason was aloha don’t sell the box if tricks separately and his unit … --- ## [Login Redis Error](https://community.openenergymonitor.org/t/login-redis-error/30304)
**Author:** [@AndrewKemp\_1](https://community.openenergymonitor.org/u/AndrewKemp_1)\ **Replies:** 7\ **Last updated:** [29 September 2026 21:11 UTC](https://community.openenergymonitor.org/t/login-redis-error/30304 "2026-09-29T21:11:16Z")
Hello, On trying to login the following error appears: Fatal error: Uncaught RedisException: MISCONF Redis is configured to save RDB snapshots, but it’s currently unable to persist to disk. Commands that may modify th… --- ## [Emoncms dashboard module security update + new features!](https://community.openenergymonitor.org/t/emoncms-dashboard-module-security-update-new-features/30332)
**Author:** [@TrystanLea](https://community.openenergymonitor.org/u/TrystanLea)\ **Replies:** 25\ **Last updated:** [29 September 2026 15:56 UTC](https://community.openenergymonitor.org/t/emoncms-dashboard-module-security-update-new-features/30332 "2026-09-29T15:56:59Z")
I’ve been continuing with the security focused work on emoncms that I’ve posted about a few times now, E.g Emoncms security notice: read to write apikey privileged escalation vulnerability, please update to emoncms 11.16… --- ## [Heatgeek cylinder vs mixergy vs something else?](https://community.openenergymonitor.org/t/heatgeek-cylinder-vs-mixergy-vs-something-else/29559)
**Author:** [@tloiqacte](https://community.openenergymonitor.org/u/tloiqacte)\ **Replies:** 32\ **Last updated:** [29 September 2026 15:01 UTC](https://community.openenergymonitor.org/t/heatgeek-cylinder-vs-mixergy-vs-something-else/29559 "2026-09-29T15:01:12Z")
I’m having a new system installed from scratch on eco4. I’m able to specify things to an extent. I’m still waiting for them to get back to me with a defined spec, but in the meantime I thought I’d be proactive and look a… --- ## [Help creating a process](https://community.openenergymonitor.org/t/help-creating-a-process/30356)
**Author:** [@phamiltonsmith](https://community.openenergymonitor.org/u/phamiltonsmith)\ **Replies:** 3\ **Last updated:** [29 September 2026 12:40 UTC](https://community.openenergymonitor.org/t/help-creating-a-process/30356 "2026-09-29T12:40:50Z")
Hi, I have an AC mains voltage input that normally ranges anywhere from say 105 to 115 V. Sometimes it can be 0 V. This value is logged to a feed. Any value above say 50v means the grid is available, anything less than … --- ## [Emoncms feed problem](https://community.openenergymonitor.org/t/emoncms-feed-problem/30348)
**Author:** [@BrianD](https://community.openenergymonitor.org/u/BrianD)\ **Replies:** 25\ **Last updated:** [29 September 2026 11:50 UTC](https://community.openenergymonitor.org/t/emoncms-feed-problem/30348 "2026-09-29T11:50:31Z")
My Feeds page is greyed out. What should I do to fix it? --- ## [Openevse Self Production feed selection](https://community.openenergymonitor.org/t/openevse-self-production-feed-selection/30341)
**Author:** [@BrianD](https://community.openenergymonitor.org/u/BrianD)\ **Replies:** 24\ **Last updated:** [28 September 2026 09:45 UTC](https://community.openenergymonitor.org/t/openevse-self-production-feed-selection/30341 "2026-09-28T09:45:39Z")
I have an openevse charge controller and a Martin Roberts based energy diverter. The system has worked brilliantly for the last 9 years or so but recently the energy diverter had a problem which required switching it of… --- ## [EmonPi2 CT Expansion](https://community.openenergymonitor.org/t/emonpi2-ct-expansion/30344)
**Author:** [@AndrewKemp\_1](https://community.openenergymonitor.org/u/AndrewKemp_1)\ **Replies:** 3\ **Last updated:** [28 September 2026 17:12 UTC](https://community.openenergymonitor.org/t/emonpi2-ct-expansion/30344 "2026-09-28T17:12:55Z")
Hello, I have an EmonPi2 (zero Version), purchased in Feb 2025 and I am aware that a 6x CT expansion card can be fitted to it. I am looking to expand my monitoring a little bit and am looking for this item, however I a… --- ## [REST API Communication for a Project Involving Excess PV Generation](https://community.openenergymonitor.org/t/rest-api-communication-for-a-project-involving-excess-pv-generation/30353)
**Author:** [@arnaud.flatres](https://community.openenergymonitor.org/u/arnaud.flatres)\ **Replies:** 1\ **Last updated:** [28 September 2026 14:30 UTC](https://community.openenergymonitor.org/t/rest-api-communication-for-a-project-involving-excess-pv-generation/30353 "2026-09-28T14:30:10Z")
Hello, I’m starting to take an interest in this topic as I’m planning to switch to an electric car, and I have solar panels (2.9 kW max) that generate between 10 and 13 kWh per day, and I use an average of only 5 kWh, de… --- ## [Altherma 4 12kW modulation range](https://community.openenergymonitor.org/t/altherma-4-12kw-modulation-range/30345)
**Author:** [@Willy99](https://community.openenergymonitor.org/u/Willy99)\ **Replies:** 3\ **Last updated:** [27 September 2026 12:37 UTC](https://community.openenergymonitor.org/t/altherma-4-12kw-modulation-range/30345 "2026-09-27T12:37:43Z")
Hi dear forum members, we intend to buy a DAIKIN ALTHERMA 4 R290 12kW or 14kW. We would need it only for room heating, not for DHW. But we need to know its modulation range, means what is the minimum heat output when t… --- ## [DIYBMS v4](https://community.openenergymonitor.org/t/diybms-v4/11292)
**Author:** [@stuart](https://community.openenergymonitor.org/u/stuart)\ **Replies:** 5346\ **Last updated:** [27 September 2026 12:28 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292 "2026-09-27T12:28:50Z")
Discussion of DIYBMS version 4 Source code and files (GITHUB open once project is launched) --- ## [Grant R290 Pump Oscillation](https://community.openenergymonitor.org/t/grant-r290-pump-oscillation/30322)
**Author:** [@MrW](https://community.openenergymonitor.org/u/MrW)\ **Replies:** 9\ **Last updated:** [25 September 2026 11:01 UTC](https://community.openenergymonitor.org/t/grant-r290-pump-oscillation/30322 "2026-09-25T11:01:49Z")
I’ve noticed a possibly odd situation since the ASHP has started to do heating again, before it actually kicks in my flow rate starts oscillating like below, taken from 11th Sep 2026: And the fan starts to pulse on a… --- ## [Aerona LAN web app](https://community.openenergymonitor.org/t/aerona-lan-web-app/30342)
**Author:** [@vanitarium](https://community.openenergymonitor.org/u/vanitarium)\ **Replies:** 0\ **Last updated:** [24 September 2026 10:40 UTC](https://community.openenergymonitor.org/t/aerona-lan-web-app/30342 "2026-09-24T10:40:53Z")
A phone-friendly dashboard and control surface for a Grant Aerona / ecoNET controller. It runs in Docker on a local machine and talks only to Home Assistant; the browser never contacts the ecoNET hub directly. The app r… --- ## [The worlds easiest Octopus heat pump install](https://community.openenergymonitor.org/t/the-worlds-easiest-octopus-heat-pump-install/27733)
**Author:** [@Swwils](https://community.openenergymonitor.org/u/Swwils)\ **Replies:** 185\ **Last updated:** [23 September 2026 22:43 UTC](https://community.openenergymonitor.org/t/the-worlds-easiest-octopus-heat-pump-install/27733 "2026-09-23T22:43:27Z")
Hi all, I’ve paid them for a heat pump install, I was going to do it myself but their quote is cheaper than the parts. If you like, I could be swayed to the Cosy 8 and we can monitor it, rather than the Daikin. I like … --- ## [Predictive Heating and Cooling control](https://community.openenergymonitor.org/t/predictive-heating-and-cooling-control/30271)
**Author:** [@Johnmo](https://community.openenergymonitor.org/u/Johnmo)\ **Replies:** 16\ **Last updated:** [22 September 2026 15:08 UTC](https://community.openenergymonitor.org/t/predictive-heating-and-cooling-control/30271 "2026-09-22T15:08:20Z")
Due the low flow temperature required for UFH I use a thermostat to control heat pump. However the floor is 100mm thick concrete with UFH pipes and the thermal lag is pretty huge. Everything is single zone so CoP is good… --- ## [Needing help with emonhub configuration for a modbus RS485 RTU connection to Solax X1 Gen.4 hybrid inverter](https://community.openenergymonitor.org/t/needing-help-with-emonhub-configuration-for-a-modbus-rs485-rtu-connection-to-solax-x1-gen-4-hybrid-inverter/28666)
**Author:** [@leiv](https://community.openenergymonitor.org/u/leiv)\ **Replies:** 12\ **Last updated:** [22 September 2026 14:14 UTC](https://community.openenergymonitor.org/t/needing-help-with-emonhub-configuration-for-a-modbus-rs485-rtu-connection-to-solax-x1-gen-4-hybrid-inverter/28666 "2026-09-22T14:14:28Z")
Hello everyone, Although I signed up to the openenergymonitor forum in September 2023, and with much interest and great benefit have followed the various discussions both before and after that time, this is my first con… --- ## [Dynamic Heat Pump Simulator](https://community.openenergymonitor.org/t/dynamic-heat-pump-simulator/28315)
**Author:** [@TrystanLea](https://community.openenergymonitor.org/u/TrystanLea)\ **Replies:** 34\ **Last updated:** [22 September 2026 13:20 UTC](https://community.openenergymonitor.org/t/dynamic-heat-pump-simulator/28315 "2026-09-22T13:20:03Z")
The latest version of our dynamic heat pump simulator now supports: Time of use tariffs! :heavy\_dollar\_sign: Fixed speed compressor mode (surprisingly useful!) :dashing\_away: Weather comp with parallel shift … --- ## [Oversized heatpump in new apartment?](https://community.openenergymonitor.org/t/oversized-heatpump-in-new-apartment/30328)
**Author:** [@luckyluc](https://community.openenergymonitor.org/u/luckyluc)\ **Replies:** 9\ **Last updated:** [22 September 2026 05:20 UTC](https://community.openenergymonitor.org/t/oversized-heatpump-in-new-apartment/30328 "2026-09-22T05:20:06Z")
Hi all, I’d appreciate some opinions on the sizing of the heat pump installed in my new-build apartment in in the Pyrenees. The apartment is around 79 m², single floor, with roughly 80 m² of underfloor heating and 10 l… --- ## [EmonTH V2 Unable to upload firmware](https://community.openenergymonitor.org/t/emonth-v2-unable-to-upload-firmware/30278)
**Author:** [@Moss](https://community.openenergymonitor.org/u/Moss)\ **Replies:** 2\ **Last updated:** [20 September 2026 16:04 UTC](https://community.openenergymonitor.org/t/emonth-v2-unable-to-upload-firmware/30278 "2026-09-20T16:04:24Z")
HI. I wonder if someone can help. I recently got a new emonTH v2. I was trying to get it to work with my current setup (setup back in 2019), this uses the legacy radio 433mhz non secure. I just seem to be getting errors… --- ## [How to change wifi password on emon pi ver1](https://community.openenergymonitor.org/t/how-to-change-wifi-password-on-emon-pi-ver1/30340)
**Author:** [@jonharnew](https://community.openenergymonitor.org/u/jonharnew)\ **Replies:** 3\ **Last updated:** [19 September 2026 11:44 UTC](https://community.openenergymonitor.org/t/how-to-change-wifi-password-on-emon-pi-ver1/30340 "2026-09-19T11:44:09Z")
Help have origional eamon pi I installed a new router today and my pi can no longer access the wifi so i presume it needs the password updating for the router. Please can anyone tell my how to do this. i have not realy h… --- ## [Grant Aerona HP290 Performance Update](https://community.openenergymonitor.org/t/grant-aerona-hp290-performance-update/30334)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 8\ **Last updated:** [18 September 2026 20:08 UTC](https://community.openenergymonitor.org/t/grant-aerona-hp290-performance-update/30334 "2026-09-18T20:08:02Z")
It’s now been over a year since I installed a Grant Aerona HP290 heat pump in my house to replace an Oil combi boiler, I’ve recently published a video update about the performance so far: TLDR: it’s working well, house … --- ## [DHW heating in warmer weather and COP](https://community.openenergymonitor.org/t/dhw-heating-in-warmer-weather-and-cop/27855)
**Author:** [@Michal\_S](https://community.openenergymonitor.org/u/Michal_S)\ **Replies:** 31\ **Last updated:** [18 September 2026 16:41 UTC](https://community.openenergymonitor.org/t/dhw-heating-in-warmer-weather-and-cop/27855 "2026-09-18T16:41:31Z")
Hi guys, When there was around 0C I’ve had around COP 2. I was in an impression that when it gets warmer I will get much better cop because more heat is extracted from air. To my surprise today was 15C outside and I sta… --- ## [New heat pump Grant R290 - hot water advice](https://community.openenergymonitor.org/t/new-heat-pump-grant-r290-hot-water-advice/28254)
**Author:** [@Durruti](https://community.openenergymonitor.org/u/Durruti)\ **Replies:** 202\ **Last updated:** [18 September 2026 10:34 UTC](https://community.openenergymonitor.org/t/new-heat-pump-grant-r290-hot-water-advice/28254 "2026-09-18T10:34:56Z")
Hi folks, We’ve had our heat pump in for a month and I’m wanting to make sure that my schedules are correct. Current DHW setup is: Setpoint 45C, Schedule 1am - 3.30am but water isn’t getting up to temp and COP is low at… --- ## [Emoncms 11.18.0 vue.js error in Post Process](https://community.openenergymonitor.org/t/emoncms-11-18-0-vue-js-error-in-post-process/30337)
**Author:** [@mortstar](https://community.openenergymonitor.org/u/mortstar)\ **Replies:** 2\ **Last updated:** [17 September 2026 18:14 UTC](https://community.openenergymonitor.org/t/emoncms-11-18-0-vue-js-error-in-post-process/30337 "2026-09-17T18:14:35Z")
When opening Post Process in v11.18.0 of emoncms I’m getting an error “Vue is not defined”. Looking at browser console that’s because /Lib/vue.min.js returns 404. --- ## [Vaillant Arotherm: excessive noise from compressor](https://community.openenergymonitor.org/t/vaillant-arotherm-excessive-noise-from-compressor/27824)
**Author:** [@UrbanPlumber](https://community.openenergymonitor.org/u/UrbanPlumber)\ **Replies:** 191\ **Last updated:** [17 September 2026 16:14 UTC](https://community.openenergymonitor.org/t/vaillant-arotherm-excessive-noise-from-compressor/27824 "2026-09-17T16:14:12Z")
It is most of the above. The back plate that holds the pipework connection can resonate, and the pipework inside can resonate, so you have to wedge the plate and strap the pipes inside. On top of that, compressor noise… --- ## [Metoffice Temperature Data Error 17th Sep 8am](https://community.openenergymonitor.org/t/metoffice-temperature-data-error-17th-sep-8am/30336)
**Author:** [@Jason](https://community.openenergymonitor.org/u/Jason)\ **Replies:** 2\ **Last updated:** [17 September 2026 15:55 UTC](https://community.openenergymonitor.org/t/metoffice-temperature-data-error-17th-sep-8am/30336 "2026-09-17T15:55:57Z")
Hi There, Am I the only one not seeing outside temperature data in emoncms.org from 8am today? Cheers Jason. --- ## [To Giveaway: 11x EmonTx V3 + accesoires](https://community.openenergymonitor.org/t/to-giveaway-11x-emontx-v3-accesoires/30335)
**Author:** [@lenlen](https://community.openenergymonitor.org/u/lenlen)\ **Replies:** 6\ **Last updated:** [17 September 2026 09:38 UTC](https://community.openenergymonitor.org/t/to-giveaway-11x-emontx-v3-accesoires/30335 "2026-09-17T09:38:08Z")
Hello community, its been some years since we used them, but they did a really good service to us. No we want to give them a second life instead of throwing them away. They are a gift, only the postage/delivery cost s… [Previous page](https://community.openenergymonitor.org/latest.md) [Next page](https://community.openenergymonitor.org/latest.md?page=2)