Author Topic: Solar BMS a charge controller for LiFePO4 OffGrid  (Read 6011 times)

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Offline electrodacusTopic starter

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Solar BMS a charge controller for LiFePO4 OffGrid
« on: February 21, 2015, 11:55:47 pm »
This will be the second version of the Solar BMS with a lot of improvements over the current SBMS4080.
I had a successful Kickstarter last year for the SBMS4080 (Solar Battery Management System) the 4080 is from 40A charging and 80A discharging so with max configuration 8 cells of LiFePO4 that is 1000W of PV panels possible and 2000W load. I produced about 100 units of SBMS4080 and smaller version SBMS1616 for backers and I also have installed two in my offgrid house (the main reason I designed this Solar BMS).
Here is a photo I actually took today of my SBMS4080
 
I made the above photo to show a record of 29.2A from 3x 240W PV panels so 720W total. The reason for this is full sun at 1:16PM snow on the ground and -22C
And below you can see a 3D render of how the new Solar BMS will look like this will be able to handle 3000W of PV and 3000W load at the same time with a TDP of just 22W
   
And here is a comparison of cost for stored energy between the best Lead Acid from Trojan and LiFePO4 from Winston.

So you see why I went for LiFePO4 over the more traditional Lead Acid. There are other problems with Lead Acid especially in a cold climate like mine but the 3x difference in cost for each kWh stored is a good enough reason by his own.
You can see more technical details on my webpage http://electrodacus.com including at the end of the page a nice 7 day graph with my house power production/consumption.
Kickstarter is less than 2 days away from starting. I will add a link here for the Kickstarter page once I have that.
It seems it will have WiFi since that is more requested than Bluetooth LE.
« Last Edit: April 05, 2015, 12:27:05 am by electrodacus »
 

Offline electrodacusTopic starter

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Re: Solar BMS a solar charge controller for LiFePO4 OffGrid
« Reply #1 on: February 23, 2015, 11:51:56 pm »
Solar BMS is now on Kickstarter
Here is the Link to Kickstarter page. https://www.kickstarter.com/projects/electrodacus/120a-solar-bms-charger-lifepo4li-ion-offgridrv-wit
A redirect from my website that is shorter easier to use http://electrodacus.com/k

Offline electrodacusTopic starter

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Re: Solar BMS a solar charge controller for LiFePO4 OffGrid
« Reply #2 on: February 25, 2015, 05:46:30 pm »
Strange it seems Kickstarter website is down right now and it is so for almost an hour. Dose this happen often?

Offline electrodacusTopic starter

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Re: Solar BMS a solar charge controller for LiFePO4 OffGrid (last 5 days)
« Reply #3 on: March 30, 2015, 02:00:16 am »
Only 5 days left currently at 83% http://electrodacus.com/k/

Offline electrodacusTopic starter

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Fully funded just a few hours left.

Offline miguelvp

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Congratulations!  :-+
 


Offline tom66

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Re: Solar BMS a charge controller for LiFePO4 OffGrid
« Reply #7 on: April 05, 2015, 12:45:01 am »
Pretty close in the end. Good luck with the rest of the project.
 

Offline electrodacusTopic starter

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Re: Solar BMS a charge controller for LiFePO4 OffGrid
« Reply #8 on: April 05, 2015, 12:50:31 am »
Pretty close in the end. Good luck with the rest of the project.

Yes I was expecting that is quite a niche product. Thanks.


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