For a month now I’ve a DESS system running on the Multi RS Solar system. Regularly I see that the solar energy is returned to the grid instead of charging the battery. Why? Is this a configuration issue?
This is happening when dynamic energy pricing is almost at the lowest point. Not as low that DESS starts charging the battery but still at a cheap price, charging the battery instead of returning to Grid at this low price point would make more sense to me. Any ideas? Suggestions on how to improve (if possible).
You should give the current beta a try. It contains changes addressing frequently seen issues with DESS unexpected feedin.
That sounds like one of them, so chances are good it is resolved in the current beta already.
Thanks for the feedback and suggestion. More than happy to try the latest beta. But where can I find the latest beta version? Can you point me to the file location?
You need to go to remote console
Then select system>firmware>online updates.
Over there you can enroll in beta program
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As described above. Don’t worry, you can always follow the same way to return to the release version, if you are experiencing any Issues with the beta. (Mind, it’s a beta 
)
Thanks. I’ve installed V3.60~48. Is this the latest beta version?
yes.
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Upgraded to the latest beta firmware, as adviced above. But I still see the same behaviour. Like today, there is plenty of solar power, but the battery is not charged.
With the latest beta firmware, should I change the configuration somehow? Any specific settings I need to adjust?
Could you share your portalid? (The numeric id in the url to your vrm portal)
Then I can review why it’s doing that. Looks like DESS is requesting a battery idle, will see, if I can find the reason for that.
Are you running trade or greenmode?
724294. Thanks for checking.
Now, at 13.26 hours the battery is being charged as it is lowest cost for today.
Yepp, just seeing that.
The earlier hour, DESS requested a target-soc of 42%, but correctly adviced the system to increase the battery charge, if possible during that hour. (Which would have been possible)
That this didn’t happen looks like a glitch in the beta. So, I’m going to review that part of the code.
Shouldn’t happen all to often, it is a consequence of a chain of events happened prior.
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Excellent, thanks for checking and the feedback. More than happy to support you and to test potential solutions.
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Some more unexpected behaviour of my setup. See screenshots below. It is 12:07 and we are almost at the lowest energy price of today (which is between 13:00 and 14:00). The car is being charged in parallel. Why is the battery being discharged? As it is almost at the lowest energy price I would expect the battery is being charged at a (almost) max possible current/power.
@dognose and feedback on this behaviour? Are you able to check and provide feedback?
Some more unexpected behaviour, cheapest energy price of the day and the battery is being discharged instead of being charged, see screenshot.
Hi,
Your hours 13,14,15 were the cheapest yesterday - and that time has been used to charge the battery as far as I can see.
So that seems to work as expect. From the charging to 100%, followed by discharging, I conclude you are running in Trademode?
@dognose Indeed, the 13, 14 and 15 hours are the cheapest and the battery should be charged, why, in both screenshots, is the battery discharging? Is this because there was a heavy load (vehicle charging) ongoing?
Im running in Trademode/DESS and the max grid current is set to 25A (for now). Soon going to increase to 30A as the main fuse is 35A.
Cheapest moment of the day, or even better, negative energy pricing, why is the DESS solution still returning energy to the GRID. I expect it is charging the batteries with maximum power possible!! What is going on? @dognose can you check again?
FYI, in parallel the dishwasher and washing machine are running as well.
I noticed that the Multi RS inverter is in the “Float” mode, this is strange with a 56% SOC. Need to check the config, but it was working perfectly (most of the times) in the last couple of weeks. Staying in the float mode is not something I’ve seen before.
Strange DESS behaviour this morning again. Energy price is at the highest, the DESS forecast shows the battery is discharging to the grid, but nothing is happening! Why? Suggestions on what could be wrong. Will drop the details on the config in a view moments as well into this post.
