Is it a BMS and MPPT charge controller rolled up into a single unit?
I'm not smart enough to understand what this is, but it looks super interesting (ElectroDacus SBMS)
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Is it a BMS and MPPT charge controller rolled up into a single unit?
Yes this is a great product got one during the crowd funding, I got the larger unit with thermal controller but I have not got a chance to build the project I want for it. Using the thermal controller to heat water and a cement slab.
EVERYONE here should check out this guys users manuals. Some of the best Ive seen for a user done product. He has some great info for using solar for thermal applications.
EVERYONE here should check out this guys users manuals. Some of the best Ive seen for a user done product. He has some great info for using solar for thermal applications.
Refinished
Shocked and Amused
Anyone using this as a BMS only? This has some really cool features and looks stoutly built.
Yeah I was just reading through the manual for the thermal controller. Its a bit over my head, but the concept sounds really cool! I love passive solar design so I'm fairly familiar with thermal batteries, and using thermal mass to regulate temperature. But I've never seen anyone else design a system that uses excess active solar energy to directly heat thermal mass like this. It sounds super cool, especially as solar is getting cheaper and cheaper! And if you are heating a slab, it could be combined with other simpler passive solar systems to be even more efficient.
Looks like the creator is currently building a BMS, haven't really checked it out in any detail, but here is the kickstarter page
Also found this video from the creator where he makes the argument that these days, PWM controllers are a viable alternative (and in some cases a smarter choice) compared to MPPT for offgrid systems.
Vern1
New Member
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- Dec 22, 2019
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Greetings,
Have had my Electrodacus SMBS120 running for 2-3 months now that I got in the lastest crowdfund.
It works well and you can use it as a BMS only.
I do have some small 24/12/5VDC DC loads on the load terminal but most of my loads are two inverters, a 2Kw 120 unit and a 4KW 120/240 Magnum hybrid inverter that the SBMS120 reads thru an external shunt between battery bank and inverters.
Using 10 245watt 24V panels (used off of ebay - 81 bux each shipped in pallet of 10) charging 16 CALB LiFePO4 180Ah batteries in 2P8S for 24V@360Ah.
Here is a shot of the tablet I use to monitor the system from about an hour ago, the sun is still behind clouds and fog but should burn off soon.
Have had my Electrodacus SMBS120 running for 2-3 months now that I got in the lastest crowdfund.
It works well and you can use it as a BMS only.
I do have some small 24/12/5VDC DC loads on the load terminal but most of my loads are two inverters, a 2Kw 120 unit and a 4KW 120/240 Magnum hybrid inverter that the SBMS120 reads thru an external shunt between battery bank and inverters.
Using 10 245watt 24V panels (used off of ebay - 81 bux each shipped in pallet of 10) charging 16 CALB LiFePO4 180Ah batteries in 2P8S for 24V@360Ah.
Here is a shot of the tablet I use to monitor the system from about an hour ago, the sun is still behind clouds and fog but should burn off soon.
i use the newest SBMS0 as my BMS on 2 Tesla Modules, 24/3000 multiplus, solar charge controler and dc to dc charger. It has low voltage shut off, low temp shut off, over charge shut off as well as auto balancing.
To be clear the SBMS60 and SBMS120 do not have built in MPPT. The charging is more like PWM.
I agree, for my application, MPPT is pretty important (very limited square footage for solar, so I can't just add extra panels) but he makes a pretty good argument for PWM with larger systems. If I had the ability to build a larger system, I might be persuaded to buck conventional wisdom and go with his solution. Here is the video where he explains why he feels MPPT is not as important today as it used to be. Its worth watching if you haven't already seen it.
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gnubie
Solar Wizard
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- Sep 20, 2019
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Power differences can be handled by more panels, but space can be a factor. The real killer, IMO, is current and the cost of the wire to handle it without excessive power loss / temperature rise. Carting 60+ amps around a roof is a costly PITA.
It looks like the SBMS0 plays nice with Victron SCCs and some others (see page 9 of the user manual)
What I don't understand about the SBMS0, unlike most other BMS' I've come across, is that the specifications don't specify the current the BMS can handle and/or specify that external relays should be used.
electric
Solar Enthusiast
@Will Prowse should do a video review of this great product for DIY market.
We should be supporting ingenuity of North American engineers who are bold enough to design and manufacture great products, competing with all that generic crap coming from Asia.
Will, I hope you are reading this...
We should be supporting ingenuity of North American engineers who are bold enough to design and manufacture great products, competing with all that generic crap coming from Asia.
Will, I hope you are reading this...
@Carly I have in the past and was quite impressed with his responsiveness (on a Sunday), but for now am trying not to pester him with questions
as I'm sure he gets a lot of them.Do you use, or are you considering, the SBMS?
@electric I believe Will has already stated his admiration/respect for Dacian and intention to review Dacian's products. Considering the versaitility and creativity of Dacian's products, and the uniqueness of some of the ideas, I could imagine it being a bit of a bigger project to review the Solar BMS in depth. I very much look forward to watching this review though. Dacian puts out some great documentation and is clearly a very sharp guy, but it is very technical in nature (as it should be), I for one would benefit greatly from @Will Prowse 's ability to explain the essential features and concepts of a very complex piece of gear in simple terms, as a complement to Dacian's great technical documentation and openness.
Started a new thread to hopefully become a SBMS general resource and discussion thread for the Solar BMS.
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Carly
New Member
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- Dec 29, 2019
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@Carly I have in the past and was quite impressed with his responsiveness (on a Sunday), but for now am trying not to pester him with questions
Do you use, or are you considering, the SBMS?
Was considering, but it's not compatible with the Victron MultiPlus Compact (24/2000/50). It is compatible with the 24/3000/70, but that is a bit too large for my system, and I believe consumes 20W vs 11W. The incompatibility has something to do with being able to turn off the inverter and charger independently/remotely.
I have one ready to review :D Just been trying to build my solar shed and review the pile of batteries sent to me. I am getting to it. I have some other super cool bms that you guys will like. Review video to come.
And I love the guy. Super smart, honest and knows what he is talking about. The manuals are great. Matching the panels to nominal battery voltage is a cheap way to make an efficient system without mppt. Awesome all around.
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