The highly anticipated high-precision “target SoC for current time slot” is not disappointing @dognose . (can say for once: I told you so?) dynamicess: support decimal fraction in target soc committed 10:20AM - 20 Nov 25 UTC (UTC) …

[image] Jan: The highly anticipated high-precision “target SoC for current time slot” is not disappointing @dognose . (can say for once: I told you so?) Glad to hear (and see :heart_eyes:) it works. Yeah, once we nailed the issue down it became apparent, where prior issues arrised from. Pre…

Ps.: you may now play a bit with your configured battery size: The charge rate jig saw indicates, that your bms is reporting the soc increase slightly faster than it should according to calculation. Thus, the chargerate is continiously lowered towards the end of each window. That usually means you…

[image] dognose: Glad to hear (and see :heart_eyes:) it works. :+1: Next thing to look into: The VRM-API return schedule objects seem to suffer from some sort of ordering issue in the immediate upcoming timeslots. It is easy to spot if you look at the return object during a charge or discha…

[image] dognose: That usually means your battery is slightly smaller in capacity than configured, hence charging faster for a certain rate than expected. I’ll save this discussion for later, I have a lot of questions concerning the inner workings of the DESS scheduler there (energy versus amp…

[image] Venus OS v3.70~81 available for public testing Change log v3.70~81 Any news on VRM-API / DESS: schedule stats irregularities predictive pricing (beyond the day ahead) extra SoC control setings

[image] Jan: Any news on VRM-API / DESS: schedule stats irregularities predictive pricing (beyond the day ahead) extra SoC control setings For those interested in nudging DESS Target SoC up or down during buy and sell periods, here a self contained flow that allows you to do precisely that.…

[image] dognose: Pretty backwards thinking to see that a “more precice system” had more issues to follow a less precice target than a less precise system had. Now a couple of days later I can state with certainty that the high precision D-Bus target SoC change is by far the best technical upg…

Things are changing without proper documentation. Some information can be found with search on this forum, some can be glanced from GitHub commits, the rest you’ll have to reverse engineer by testing and monitoring behaviour. The cooperation model between users and developers is, let’s say, sub-opti…

I was bummed out by the lack of docs on the node-red components as well. But it seems to be more of a side-project than part of the actual product. I mean, the repo is under a person’s name, not the company: GitHub - dirkjanfaber/victron-vrm-api: Interface with the Victron Energy VRM API . That sai…

[image] hsmade: I think changelogs for the API should be there indeed. That’s a ‘public’ service. But also versioning the API and having major releases for breaking things would be very helpful. And I can’t imagine they don’t have this information for their official partners etc. This exactly…

DESS, VRM and related queries

Beta testing Venus OS beta testing

UpCycleElectric (Jan) 27 January 2026 13:29 6

Any news on VRM-API / DESS:

schedule stats irregularities
predictive pricing (beyond the day ahead)
extra SoC control setings

Topic		Replies	Views
DESS charges only 1-2 minutes per quarter due to hourly SOC target communicated every 15 minutes DESS diy , vrm , dess , 3-phase , cerbo-gx	48	274	11 March 2026
DESS: charging goes through 15 minute cycles DESS dess , multiplus-ii , 3-phase	103	1452	19 October 2025
Paging all DESSies: Who wants to actively participate in a community DESS fork effort? DESS diy , dess , node-red , victron_community	40	725	21 November 2025
DESS not honoring "zero sell to grid" today ? (2025-05-10 + 2025-06-16) DESS vrm , dess	35	231	18 June 2025
Node-RED DESS implementation issues with 15 minute pricing Node-RED	60	1036	28 October 2025

DESS, VRM and related queries

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