Venus 3.79 DESS in Green mode enabled 3 days ago UK based with time of day tariff: 23.30 - 05.30 7p / unit Rest of time 30p / unit (Why can’t you select and change the first time when configuring ?) On the 3rd day SOC was down to 6% and would have been pulling from the grid soon after I have…

None of this is controlled or affected by the version of the GX OS, it is VRM functionality.

Nick is right that the scheduling is determined in the VRM cloud. But am I right that your complaint is that you can’t change the From time on the first row and have to fill out a third line? Seems a bit far fetched. Configuring only needs to be done once and it isn’t that hard. [image] You have…

Considering ESS also has a hysteresis, it should never be set to 0. That is just not a great idea if the system is expected to behave in a consistent and predictable manner :eyes:

I strongly disagree about not setting SOC to 0% If I changed it to 10% all that would happen is I would pull from the grid sooner. It’s a hard limit What is required is a separate soft limit for Dess This woul account for times when solar production or electric consumption does not meet the forec…

[image] dmsims: I strongly disagree about not setting SOC to 0% Not asking for agreement. ESS has a ± 3% hysteresis, the battery can never reach -3% so a 0% soc is a zone it is not intended to be in, bad practice for fully discharging a battery notwithstanding. If you configure a system in …

Apart from Nicks remarks being right here: If I changed it to 10% all that would happen is I would pull from the grid sooner. It’s a hard limit The algorithm also uses the min SOC to calculate how full it needs to charge the battery in the expensive hours to cover your forecasted usage (+plus so…

[image] Nick: bad practice for fully discharging a battery notwithstanding. I’m sorry but this is nonsene for Lifepo4 I’m sorry but I just don’t see the logic behind looking at the minimum SOC - how would the system use anything below that ?

Depending on how large your battery bank is and if you are using the system for power assist etc it is needed to have that little bit there. The system uses a little for self consumption from the battery at the min soc when it is idle, it makes sense to have a little at the bottom. Also you aren’t…

Also assumes SOC is accurate. It isn’t always. Don’t recall many manufacturers encouraging 100% DOD, typically 5 to 20% to avoid issues and improve lifespan. Way too easy to hit a voltage threshold and then have real problems restarting. If best practice isn’t followed, bad experiences follow. F…

You seem to lack a full comprehension of the ESS mechanics. The min soc is to keep the battery in the optimal DOD zone for the manufacturer - this varies from one to another. 0% is uncommon even for lithium. It is also to guarantee a reserve to cater for grid loss - min soc is ignored when in inve…

V3.79 still not fit for production

Q&A and troubleshooting DESS

dmsims 5 September 2026 12:39 13

Topic		Replies	Views
Minimum SOC Using DESS DESS dess	4	261	18 October 2025
Set a minimum SOC for green DESS DESS diy , ess , vrm , dess	23	595	24 October 2025
DESS: Trade: is there a way to set a separate MIN SOC for DESS scheduling? DESS dess , cerbo_gx	6	121	2 October 2026
[Dynamic ESS] Add SOC level, below which NOT TO SELL energy to grid, but only support AC loads DESS dess , dynamic_ess , feature-request	40	2364	15 September 2026
DESS: Consumption forecast far too low DESS ess , vrm , dess	9	439	19 September 2024

V3.79 still not fit for production

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