SBMS - Solar BMS from electrodacus

[froggy]

Thanks, have you had an experience with the SBMS?

Once they were gone there were no more available, so those on other forums saying they have a few of the originals on the way are telling porkies.

T1 Terry

Not sure what you mean by this?
He’s clearly made some new models and is shipping these out?

[T1 Terry]

Thanks, have you had an experience with the SBMS?

Once they were gone there were no more available, so those on other forums saying they have a few of the originals on the way are telling porkies.

T1 Terry

Not sure what you mean by this?
He’s clearly made some new models and is shipping these out?

The first design is the one anyone would have any experience with and they are not the same as this latest design, he used those to base the modifications for the new design. When this new design was first floated a number of people posted on various forums that they were getting a few of the old design unit for testing. I already knew that was nonsense because there had been none of the old design available for a few yrs.
I'm still waiting for my 2 units to arrive so it would be interesting to find out if anyone else has their units yet.

[froggy]

Gotchya, what model have you got? Will these be the first ones you have seen or have you had his past models?
My tracking shows mine has left canada and on the way to aus.

[T1 Terry]

Gotchya, what model have you got? Will these be the first ones you have seen or have you had his past models?
My tracking shows mine has left canada and on the way to aus.

These new units will be my first actual hands on experience with them. They are the 120amp units and were supposed to have left there quite some time back. Were you one of the original backers? I was no28 apparently. I have sent another message to Dacian to see if he has a tracking number so we can see if it has got misdirected to Austria or something..... had it before

T1 Terry

[froggy]

No not an original backer, just purchased the other day, I paid extra for tracking.
Everything I’ve seen he seems genuine?
Hopefully that’s the case.
How long ago did you pay for it.

[T1 Terry]

Just received a reply, the parcel was sent 12/10 so their mail service must be a bit like ours. Knowing my luck it will turn up while we are off doing this job that I wanted to install the first test unit in and I'll have an 8 hr plus round trip to pick it up.

T1 Terry

[froggy]

Hmm thats getting to be a while ago, probably pays to do tracking for 25 odd extra dollars.

[native pepper]

Had a few email discussions with Dacian, but his technical explanations don't encourage me to buy one of these. Which could have something to do with my lack of technical understanding. They are not mppt controllers and you have to match the panel voltage with controller, so can't use 24v panels on a 12v pack.

His explanation of supposed cell balancing uses a 200mA trickling charge, to me is really just a low float charge. Then he says his 100amp pack gets a cell imbalance of 2ah after 4 months, balancing is only done during charging and just adds 200ma to lower voltage cells. Which doesn't account for any cells that go over their upper parameters, so if the pack reaches it full SOC, it will have cells over and cells under their upper voltage parameters.

I have a number of supposed lifepo4 bms control systems sitting in a big box, they were all tested and discarded because they didn't do the job. Which is why the system I have now is just a simple single stage mppt controller and active cell equalisers. Never out of balance at any state of charge, puts in as much amps as are available and switches off at the 14v, can't get any more simple than that.

[T1 Terry]

Had a few email discussions with Dacian, but his technical explanations don't encourage me to buy one of these. Which could have something to do with my lack of technical understanding. They are not mppt controllers and you have to match the panel voltage with controller, so can't use 24v panels on a 12v pack.

His explanation of supposed cell balancing uses a 200mA trickling charge, to me is really just a low float charge. Then he says his 100amp pack gets a cell imbalance of 2ah after 4 months, balancing is only done during charging and just adds 200ma to lower voltage cells. Which doesn't account for any cells that go over their upper parameters, so if the pack reaches it full SOC, it will have cells over and cells under their upper voltage parameters.

I have a number of supposed lifepo4 bms control systems sitting in a big box, they were all tested and discarded because they didn't do the job. Which is why the system I have now is just a simple single stage mppt controller and active cell equalisers. Never out of balance at any state of charge, puts in as much amps as are available and switches off at the 14v, can't get any more simple than that.

Not a BMS system I'd use as a stand alone either, but as far as a controller it does have a lot to offer. If it works as intended and I can get it to also call back to base if something goes out of the parameters and send a 24hr log to a remote server each day then it will do what I need. Then I can establish remote monitoring of off grid systems and set up a maintenance team to sort issues before they become a problem. That way I hope to create a system that requires no user understanding regarding the system operation, just use and enjoy.
If this does what I hope it will save me having to design a similar system and hopefully between us we can iron out any bugs and get them into a production run.

T1 Terry

[froggy]

Tracking shows mine hit the country yesterday after being MIA for 2 weeks.