# Latest **URL:** https://community.openenergymonitor.org/latest.md [Latest](https://community.openenergymonitor.org/latest.md) · [Categories](https://community.openenergymonitor.org/categories.md) · [Tags](https://community.openenergymonitor.org/tags.md) --- ## [🎉 emonPi3 & emonTx6 Hardware Now Available](https://community.openenergymonitor.org/t/emonpi3-emontx6-hardware-now-available/29943)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 2\ **Last updated:** [19 July 2026 19:42 UTC](https://community.openenergymonitor.org/t/emonpi3-emontx6-hardware-now-available/29943 "2026-07-19T19:42:59Z")
We are thrilled to announce that the emonPi3 and emonTx6 are now officially available in our shop! :partying\_face: These models succeed the emonPi2 and emonTx5. While they maintain the same functional experience, they f… --- ## [Heat pump learning resources](https://community.openenergymonitor.org/t/heat-pump-learning-resources/27010)
**Author:** [@TrystanLea](https://community.openenergymonitor.org/u/TrystanLea)\ **Replies:** 20\ **Last updated:** [13 August 2026 02:19 UTC](https://community.openenergymonitor.org/t/heat-pump-learning-resources/27010 "2026-08-13T02:19:54Z")
Thought I would try and collect a list of useful technical learning resources for heat pump system design and optimisation, in particular from those engaged in the discussion here on OpenEnergyMonitor/HeatpumpMonitor, bu… --- ## [Welcome to OpenEnergyMonitor & FAQ](https://community.openenergymonitor.org/t/welcome-to-openenergymonitor-faq/8)
**Author:** [@system](https://community.openenergymonitor.org/u/system)\ **Replies:** 0\ **Last updated:** [11 April 2016 23:37 UTC](https://community.openenergymonitor.org/t/welcome-to-openenergymonitor-faq/8 "2016-04-11T23:37:10Z")
Welcome to the OpenEnergyMonitor community! OpenEnergyMonitor is a project to develop open-source energy monitoring tools to help us relate to our use of energy, our energy systems and the challenge of sustainable energy… --- ## [Emoncms feed problem](https://community.openenergymonitor.org/t/emoncms-feed-problem/30348)
**Author:** [@BrianD](https://community.openenergymonitor.org/u/BrianD)\ **Replies:** 17\ **Last updated:** [28 September 2026 22:42 UTC](https://community.openenergymonitor.org/t/emoncms-feed-problem/30348 "2026-09-28T22:42:35Z")
My Feeds page is greyed out. What should I do to fix it? --- ## [Post Process not working](https://community.openenergymonitor.org/t/post-process-not-working/30355)
**Author:** [@SnowMonkey](https://community.openenergymonitor.org/u/SnowMonkey)\ **Replies:** 4\ **Last updated:** [28 September 2026 20:22 UTC](https://community.openenergymonitor.org/t/post-process-not-working/30355 "2026-09-28T20:22:54Z")
When Post processing P1, Grid CT, with Allow Negative the Post Processor hangs up after initiating Run by getting stuck on Running. --- ## [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… --- ## [Help creating a process](https://community.openenergymonitor.org/t/help-creating-a-process/30356)
**Author:** [@phamiltonsmith](https://community.openenergymonitor.org/u/phamiltonsmith)\ **Replies:** 1\ **Last updated:** [28 September 2026 18:18 UTC](https://community.openenergymonitor.org/t/help-creating-a-process/30356 "2026-09-28T18:18:38Z")
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 … --- ## [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… --- ## [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:** 1\ **Last updated:** [28 September 2026 12:31 UTC](https://community.openenergymonitor.org/t/poor-contrast-nearly-invisible-axis-labels-in-dark-mode-emoncms-graphs/30352 "2026-09-28T12:31:52Z")
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… --- ## [Login Redis Error](https://community.openenergymonitor.org/t/login-redis-error/30304)
**Author:** [@AndrewKemp\_1](https://community.openenergymonitor.org/u/AndrewKemp_1)\ **Replies:** 5\ **Last updated:** [27 September 2026 20:12 UTC](https://community.openenergymonitor.org/t/login-redis-error/30304 "2026-09-27T20:12:30Z")
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… --- ## [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) --- ## [OVMS ZE1 (40kWh & 64kWh 2018+) Nissan LEAF CAN tap cable available..soon](https://community.openenergymonitor.org/t/ovms-ze1-40kwh-64kwh-2018-nissan-leaf-can-tap-cable-available-soon/29798)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 37\ **Last updated:** [27 September 2026 01:10 UTC](https://community.openenergymonitor.org/t/ovms-ze1-40kwh-64kwh-2018-nissan-leaf-can-tap-cable-available-soon/29798 "2026-09-27T01:10:00Z")
OVMS now supports the ZE1 Nissan LEAF (40kWh & 64kWh 2018+) :partying\_face: However, currently this requires a custom CAN tap cable to bypass the CAN gateway on the, see docs: Nissan Leaf/e-NV200 — Open Vehicles documen… --- ## [Tx4 data not being processed into Emoncms](https://community.openenergymonitor.org/t/tx4-data-not-being-processed-into-emoncms/30338)
**Author:** [@diyhouse](https://community.openenergymonitor.org/u/diyhouse)\ **Replies:** 6\ **Last updated:** [26 September 2026 17:02 UTC](https://community.openenergymonitor.org/t/tx4-data-not-being-processed-into-emoncms/30338 "2026-09-26T17:02:49Z")
I am running an EmonPi,… with a Tx4 ( 12 CTs )… and a couple of radio temp sensors… All s/w is at latest… with new backup processes running… I have just had to hard reset,. Power off/On… for the second time in a few da… --- ## [Sudden drop in heat output during hot water cycle for Grant HP290 on silent level 2](https://community.openenergymonitor.org/t/sudden-drop-in-heat-output-during-hot-water-cycle-for-grant-hp290-on-silent-level-2/30139)
**Author:** [@riwaller](https://community.openenergymonitor.org/u/riwaller)\ **Replies:** 12\ **Last updated:** [26 September 2026 12:13 UTC](https://community.openenergymonitor.org/t/sudden-drop-in-heat-output-during-hot-water-cycle-for-grant-hp290-on-silent-level-2/30139 "2026-09-26T12:13:33Z")
Having just had a heat pump install comprising a 6.5kW Grant Aerona R290 paired with a 250 litre Newark super cylinder, this is my first post and I wanted to start by saying it’s great to have the chance to join the OEM … --- ## [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:** 30\ **Last updated:** [25 September 2026 21:52 UTC](https://community.openenergymonitor.org/t/heatgeek-cylinder-vs-mixergy-vs-something-else/29559 "2026-09-25T21:52:39Z")
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… --- ## [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:** 34\ **Last updated:** [25 September 2026 13:12 UTC](https://community.openenergymonitor.org/t/emoncms-dashboard-module-security-update-new-features/30332 "2026-09-25T13:12:15Z")
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… --- ## [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 … --- ## [Troubleshooting Samsung 101 error codes on a AE080RXYDGG/EU ... wiring?](https://community.openenergymonitor.org/t/troubleshooting-samsung-101-error-codes-on-a-ae080rxydgg-eu-wiring/30295)
**Author:** [@Martijn\_Hinderdael](https://community.openenergymonitor.org/u/Martijn_Hinderdael)\ **Replies:** 55\ **Last updated:** [23 September 2026 05:36 UTC](https://community.openenergymonitor.org/t/troubleshooting-samsung-101-error-codes-on-a-ae080rxydgg-eu-wiring/30295 "2026-09-23T05:36:43Z")
I currently have a Samsung AE080RXYDGG/EU heat pump that is showing 101 error codes every few weeks or so. I have not been able to connect it to a certain event in my house or in the heat pump itself so far. It did not … --- ## [Kinetos professional openEVSE Wallbox issues](https://community.openenergymonitor.org/t/kinetos-professional-openevse-wallbox-issues/28762)
**Author:** [@Shockwave](https://community.openenergymonitor.org/u/Shockwave)\ **Replies:** 44\ **Last updated:** [23 September 2026 03:52 UTC](https://community.openenergymonitor.org/t/kinetos-professional-openevse-wallbox-issues/28762 "2026-09-23T03:52:46Z")
Hello, there was a german Company (Kinetos), which took the 3 Boards (Mainboard , WIFI WT32, Power) on one circuitboard and produced it in China. The company is insolvent and nobody can help with it. Now i have Proble… --- ## [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 … [Next page](https://community.openenergymonitor.org/latest.md?page=1)