Hello everyone, I’ve had a BasenGreen 51.2V 200Ah battery in production for about 10 days, connected to a Victron SmartSolar MPPT 150/45.
Here’s what I’ve observed:
The battery does reach the charging values, but only after 55.10 V and 99% SOC.
The cell delta sometimes rises up to 0.201 V when there are no loads during absorption, but as soon as a load is applied it immediately drops.
In the evening the delta remains low, around 0.006 V.
The SOC behavior seems a bit unusual, as if it’s more related to cell voltage than to a real Ah count in/out.
I may be misinterpreting these data, so I’d like to ask for advice from those who already have experience with this battery:
Is it normal for the delta to rise without load and then drop immediately once a load is applied?
Have you noticed similar SOC behavior with BasenGreen batteries paired with Victron?
Are there absorption/float parameters that should be adjusted to stabilize the delta?
BasenGreen support gave me one generic reply but has not provided further clarification. I’d really appreciate feedback from users who already have this battery in production, to understand if what I’m seeing is normal or if I’m missing something.
Thanks in advance for sharing your experience. Francesco
The balancer only works from a cell voltage from 3.5V… I think that’s quite high, but the balancer won’t be the fastest… I haven’t found anything about that.
It’s completely normal for the voltage/delta to increase without a load. The batteries then hardly take up any charge… which naturally prefers to go to the load rather than the battery.
What do the batteries say in the app… Did you have a full charge and balancing when you first started using it…
Hello and thank you for answering. The battery is new, has only 3 charge cycles. I used a vatrer 51.20v 100Ah of which I am very very happy, but to increase the resources in the house I bought this basengreen, so I moved the vatrer to another site. The parameters I used with the vatrer, and my fantastic victron 150/45A smart solar were these :
user profile
absorption voltage 56.60 v
during automatic absorption managed by the scc (nomrally lasted about 30 mn )
Float even if in lifepo4 does not exist at 55.40 v
The vatrer battery during the charge never had high deltas, maximum 0.086 and in the evening at the cut off 0.005 .
I entered the same parameters on basengreen, but the behavior was different.
I noticed that the battery absorbs normally, but even if the victron gave me battery voltage 56.40v if I checked instead the voltage of the bms marked 55.40 v and no absorption, also I saw that the delta was about 0.180 mv high! this delta drops progressively, and in the evening it even stands at 0.005 mv . I thought that this battery having a bms I think tinypwr bms works in passive mode as perhaps works the bms of the vatrer, so for the balance must discharge in heat the excess of the voltage.
Long story short now I find myself with a bulk of 55.10v and float 54 . Also today with load of only 300w during the day, the delta of the battery was kept around 0.110, but as soon as I charged 1800w, the victron produced only 1200w the battery intervened dispensing about 700w and the delta started to drop in a short time and get to 0.070 mv.
Having said that, I ask you if you can help me set on my victron the volts of absorption, duration of absorption and voltage of float, I could try and see what happens. Thank you so much for the moment.
I send you two images to make you understand the situation today.
You should definitely try using the app and take a look at the Basengreen BMS… or use the display. It may be that with such a high charging voltage, one of the cells becomes so unbalanced that the BMS stops the charging process. HomeAssistant won’t show you this… you’re not importing the data from the BMS into your HomeAssistant, are you?
Leave the two charging voltages in the MPPT at 56V… and observe the behavior of the BMS… the batteries don’t have to reach 100% SOC… what’s important is that the charging voltages of the 16 cells are evenly… The battery must remain healthy and not always be at 100%.
The data I read comes from reading the bms, via home assistant integration BLE monitor battery that reads the data of this bms tinypwr I think it is this bms . I wanted to add that the battery still keeps a delta still low up to 54.80 v and 99%, but continues to absorb even 1 kwh. The battery is new as you saw, the one I could try in the evening and turn on the warming climate (1.3 kwh ) and the battery does not break down the delta remains 0.006 . Only the fact that the victron carries it above 55.60 e.g. 56.40, the scc tells me that the battery is 56.40 but looking at the data read through the HA app tells me e.g. 54.40 and the indication that it is not charging and the soc is 99%. No error on the part of my victron all regular. In my opinion it is possible that this new battery, at 54.80 maintains an acceptable delta, but being “slow” in the balancing procedure protects the cells ?? Mine are just doubts, because the battery dispenses what I want, without compensation. As you can see now from the HA image the delta is very low almost to super balance levels.
I also attach the image of the software supplied through rj45 .
