Current Sharing Experiment: 25kWh LiFePO4 w/ Diagonal Wire Configuration

Some are saying that this configuration should allow for equal charge and discharge. Not true. One of our forum members did the math! Check it out here. It shows why I got the results I got: diysolarforum.com/threads/some-modeling-to-go-with… Beginners should check out the free PDF from Victron called Wiring Unlimited. It is a fantastic resource if you do not understand what is going on in this video: diysolarforum.com/resources/wiring-unlimited.2/ Part 1 of this current sharing series: https://youtu.be/oXBT8lSC25M Server rack batteries: www.mobile-solarpower.com/server-rack-lifepo4.html All in one systems: www.mobile-solarpower.com/all-in-one-122448v-packa… ~~~~~~~~~~~~~~~~~~~~~~~~~~ Does off-grid solar confuse you? Check out my DIY friendly website for solar system packages and product recommendations, and so much more! www.mobile-solarpower.com/ Join our DIY solar community! #1 largest solar forum on the internet for beginners and professionals alike: www.diysolarforum.com/ Check out my best-selling, beginner-friendly 12V off-grid solar book (affiliate link): amzn.to/2Aj4dX4 If DIY is not for you, but you love solar and need an offgrid system, check out Tesla Solar. Low prices and great warranty, and they can take your entire house offgrid with their new Powerwalls: ts.la/william57509 ~~~~~~~~~~~~~~~~~~~~~~~~~ My solar equipment recommendations (Constantly updated! Check here first): 12V/48V Lithium Batteries: www.mobile-solarpower.com/solar-batteries.html Solar System Component Directory: www.mobile-solarpower.com/solarcomponents.html Plug-N-Play Systems: www.mobile-solarpower.com/full-size-systems.html Complete 48V System Kits: www.mobile-solarpower.com/complete-48v-solar-kits.… DIY Friendly Air Conditioner/ Heat Pumps: www.mobile-solarpower.com/solar-friendly-air-condi… Complete 48V System Blueprint: www.mobile-solarpower.com/48v-complete-system-blue… ~~~~~~~~~~~~~~~~~~~~~~~~~~ My Favorite Online Stores for DIY Solar and Coupon Codes: -Current Connected: SOK, Victron and High Quality Components. Best prices and warranty around: currentconnected.com/?ref=wp -Signature Solar: Cheap Server Rack Batteries and Large Solar Panels: www.signaturesolar.com/?ref=h-cvbzfahsek -Ecoflow Delta Official Site: My favorite plug-n-play solar generator: us.ecoflow.com/?aff=7 -AmpereTime: Cheapest 12V batteries around: amperetime.com/products/ampere-time-12v-100ah-lith… -Rich Solar: Mega site and cheaper prices than renogy! Check them out: richsolar.com/?ref=h-cvbzfahsek -Shop Solar Kits: Huge site with every solar kit you can imagine! Check it out: shopsolarkits.com/?ref=will-p -Battery Hookup: Cheap cell deals bit.ly/2mIxSqt 10% off code: diysolar -Watts 24/7: Best deals on all-in-one solar power systems, with customer support and distribution here in the USA: watts247.com/?wpam_id=3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Contact Information: I am NOT available for personal solar system consult! If you wish to contact me, this is my direct email: williamprowsediysolar@gmail.com/ Join the forum at diysolarforum.com/ if you wish to hang out with myself and others and talk about solar FTC Disclosure Statement and Disclaimers: Every video includes some form of paid promotion or sponsorship. Some links on this youtube channel may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. My videos are for educational purposes only. Information is subject to change/update at any time. Electricity is DANGEROUS and can kill. Be smart and use common sense :) DIY Solar Power with Will Prowse is a participant in the Amazon Services LLC Associates Program, An affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com/

Hi Will I'm 56 single female and at 55 because of watching your videos I felt confident enough to design and build a off grid solar system. It worked perfectly from the very beginning and has worked since... its going on 2 years. Your videos are so informative and you are such a good teacher...Thank you for all of the thrilling opportunities. Tammy Halcomb

I absolutely love these battery tests! I spend do much time wondering about the best ways to wire batteries like I going to reinvent the wheel, then will not only does the tests but explains everything in great detail.. thank you @DIY Solar with Will Prowse

Would be interesting to a thermal camera to your tool kit. Would be cool to ‘see’ the cables warming up. It would also be handy to help identify bad crimps or bad connections too.

Awesome video as always Will. One of the things I really appreciate, is the fact that you stay on real world topic. And Don't drift off into minutiae that nobody really cares about. Not to mention the fact it over complicates. I consider myself a novice at best. Please keep them coming big guy!

Will, I really liked this hands on example of a practical system. This is the best of the internet.

I have read (and heard of) all the different things that were demonstrated in this video, but this is the 1st time I've actually seen it. Outstanding video, Will!

Good to see it working well. I have 12x 100A lofepo4 connected the way you showed at the video!

Man, this is top notch. Nothings like a visual demonstration like this

Fascinating results, thanks for the additional testing!

It’s actually quite simple. When the batteries are at the top or bottom of the curve, the large batteries will supply more power (amps) as they’ll stay in the steep curve longer than smaller ones (they’ll be both supplying the power and pulling up/charging the smaller batteries). Once they are in the flat curve all will contribute the same as all will be around the same voltage. Once they reach the bottom curve, the large batteries will supply more power again as they will still be in the flat area - they will “prohibit” the small batteries from dropping - keeping the voltage at the flat area. Bottom line, if you want to use this type of setup, especially with LiFePo4, just keep the voltages very close to the flat area. Then 99% of the time, all batteries will be contributing the same as they will have limited voltage differences.

Awesome and useful test and proof points. It also shows how well the MPP LV6548's handle large loads!

@willprowse I can't remember what video started me on the youtube rabbit hole but when I cam across your's (looking for opinion videos on RV batteries) your information, presentation, detail, proper procedures,etc , the first 2-3 seconds I thought you were a high schooler but then quickly realized no way could someone that young be this knowledgable. I'm a micosoft sys eng... but your channel got me binging and finind a new hobby Batteries!.

I use a bussbar with opposite connections and have no issues and highly recommend it, well worth the investment

You have alot of effort put into this channel , you are the boss on this topic !

Hello Will. I just want to say thanks for all of your videos. You have the coolest job and I really appreciate the information and tutorials. Keep it going! You’ve inspired me to put together a 12V 600Ah system for my RV and I’m in the midst of building it now. This battery test video reassures me that I should be okay to use 4/0 cable and hookup my six 100Ah Lithium batteries in the same diagonal wiring configuration you have demonstrated here. I hope to be finished with it in a few weeks.

Thanks for sharing your results. Much to be considered...

Thank You Will, every one of your videos are a learning experience of eminence value. Amazing you give it away. You are a good man.

i bought the book -mobile solar power - made easy thank you for writing this - very easy to understand

Watching this again because as I mentioned elsewhere I'm playing with a lithion and lifepo4 parallel packs connected to the same inverter. It really I testing how the two act differently but the major item I'm noticing is how they share current. It is really I trusting. I've got a pile of wire from changing lengths, guage, and I've ven recently changed the connection location. The lifepo4 likes to dump current but the lithion shines on low current constant load situations. Best way to thoroughly learn is with your hands. Personally anyway