Solar BMS a charge controller for LiFePO4 OffGrid - Page 1
Forum section: electronics / general

author: electrodacus
author_rank: Super Contributor
timestamp: February 21, 2015, 11:55:47 pm
content: 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 SBMS4080I 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 -22CAnd 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 22WAnd 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 webpagehttp://electrodacus.comincluding 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.

author: electrodacus
author_rank: Super Contributor
timestamp: February 23, 2015, 11:51:56 pm
content: Solar BMS is now on KickstarterHere is the Link to Kickstarter page.https://www.kickstarter.com/projects/electrodacus/120a-solar-bms-charger-lifepo4li-ion-offgridrv-witA redirect from my website that is shorter easier to usehttp://electrodacus.com/k

author: electrodacus
author_rank: Super Contributor
timestamp: February 25, 2015, 05:46:30 pm
content: Strange it seems Kickstarter website is down right now and it is so for almost an hour. Dose this happen often?

author: electrodacus
author_rank: Super Contributor
timestamp: March 30, 2015, 02:00:16 am
content: Only 5 days left currently at 83%http://electrodacus.com/k/

author: electrodacus
author_rank: Super Contributor
timestamp: April 03, 2015, 09:58:33 pm
content: Fully funded just a few hours left.

author: miguelvp
author_rank: Super Contributor
timestamp: April 04, 2015, 11:49:45 pm
content: Congratulations!

author: electrodacus
author_rank: Super Contributor
timestamp: April 05, 2015, 12:26:27 am
content: Quote from: miguelvp on April 04, 2015, 11:49:45 pmThanks.

author: tom66
author_rank: Super Contributor
timestamp: April 05, 2015, 12:45:01 am
content: Pretty close in the end. Good luck with the rest of the project.

author: electrodacus
author_rank: Super Contributor
timestamp: April 05, 2015, 12:50:31 am
content: Quote from: tom66 on April 05, 2015, 12:45:01 amYes I was expecting that is quite a niche product. Thanks.