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.html DIY Friendly Air Conditioner/ Heat Pumps: www.mobile-solarpower.com/solar-friendly-air-conditioners.html Complete 48V System Blueprint: www.mobile-solarpower.com/48v-complete-system-blueprint.html ~~~~~~~~~~~~~~~~~~~~~~~~~~ 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-lithium-lifepo4-battery?ref=h-cvbzfahsek -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

Answered with logic and reason, not emotion. Well done.

Video summed up: Will: I have years of experience with various Battery chemistries, their charging cycles, cell degradation and have read into a ton of literature. Additionally I have tested countless different BMS and know exactly what to look out for. People with 5min google knowledge: „NO“

Finally. The trolls get called out by name and take a hit. Well done Will Prowse, well done.

Honestly, as a new guy to this stuff, I appreciated this video because it addresses some of the issues people bring up that I have not read in any literature. But they are self proclaimed experts. I don't have the knowledge to dismiss their claims so seeing this helps people like me remember that everyone thinks they're an expert until they meet a real one. Thanks Will.

Great rebuttal to these misplaced comments. So many folks are quick to correct when they have partial information. I appreciate your thorough understanding and help clarifying these folks erroneous information.

The calmest "AHWWW HELL NO!!!!" i ever seen, keep up the good work and research you do for the rest of us.

This is the perfect level of 'face planting' that our society needs more of these days. You're not being outright mean or nasty, but nor are you subscribing to the overly gentle politically correct agenda that continues to allow people to remain misinformed and thus continue to misinform others. You're a beacon of light. Keep it up!

"Please Substantiate Your Claims With Evidence" - Will Prowse, September 2020 - Amen Will, amen!

You are so kind. That was the most gracious debunk I have every witnessed. Thank you! Civility is not dead.

Love seeing guys that just got into this topic because of their e-scooters and new RVs pushing back on guys that have literally lived this specific topics for years. Keep it up Will!!!

Hey Will, first of all: Really like your videos, how you explain things and bring the important bits and pieces to the viewer! As a doctorate student in the field of safety of lithium ion batteries, I can affirm that you do have a good understanding and structural approach on the topics. Built my own small solar farm (as a hobby the past weeks) and was lucky to find your channel, especially about some stuff where I needed more info on (MPPT vs PWM, real life data on inverters etc). For the C-rate topic: The rated nominal capacities for cells are measured for a certain current/C-rate, of course with a higher discharge current the capacity decreases slightly due to the DC-IR drop, but I think you also mentioned this. Keep it up, you're putting out great content and dont let those comments get you down!

Your methods are sound, proven and consistent. The findings are easily repeatable, good scientific methods applied here. I trust your findings, as I have seen your earlier videos where you have honed your methods. You are my "go to guy" for allthings solar. Keep up the good work.

wow, right off the top name-checking ignorant viewers. gotta love this guy. 😀

Will dont let the haters get to you when you get this big the bigger the haters

Thank you for your patience, and thank you for sharing. I learn a lot from you and it comes across in your enthusiasm while you teach us. Thank you for all you do.

How Many you tubers call Out there commenters/subscribers? Gotta love this guy and how he is serious about what he does. No BS here! Keep it up Will!

You’re getting so big, you’re gonna get a ton of “experts” chiming in. You’re an eccentric man which makes you so captivating and refreshing from the rest. Your methods and knowledge is sound.

I'm going to tell you strait up what I like about what you're doing. You have facts and you're not expressing an opinion, and when you do give an opinion, you say its an opinion. A fact can't be disputed. It stands on its own merits. I never argue with my opinion because my opinion is worthless. Only the facts matter. The worse thing someone can do is to try and provide credibility to their argument by telling me they are an EE. and they know what they are talking about. I will relish the opportunity to tell them they should seek compensation for their lack of an education. Disputing the manufactures recommendations and specifications isn't smart unless someone can show test data measurements that conflict with the manufactures data sheet. The only exception to this is UL laboratories safety recommendations, if there are any. They have the final word and shouldn't be ignored under any circumstances.

Will you rock! The minute I saw your first video, I was like: THIS GUY HAS DONE HIS HOMEWORK AND CONTINUES TO DO HIS HOMEWORK! You are humble, funny, accurate, up front but also and more importantly HONEST! People who truly follow you get what you're about, enjoy all of your work, and appreciate what you're contributing. You've taught a lot. Keep up the good work.

The 55 dislikes on your video so far are the ones that got taken to school! Amazing job explaining and educating us with FACTS 👍✌😁

Ignorance in a comment section? NEVER!!! 😂😆🤣

LOL. I’ve been using LiFePo batteries for 10+ years. You got it all solid. Keep cruising 😎👍

Will you saved me literally thousands. The links from your website helped me find a deal on used 250W panels, a pallet of 10 for about 20 cents a watt. They're shipping now and I'll let ya know how it goes after setup. Even if only half work that's an order of magnitude cheaper than renogy. Bought your book on amazon as a thank you for this and all the other good info. Will post a review when it arrives. Keep up the good work and thanks again, you're really making a positive difference for a lot of folks.

I love these videos. It's a nice way to keep people from falling for disinformation while giving the rest of us a refresher and deeper understanding of everything you've been studying and learning. Keep up the great work!

"Watch my beginner videos!" HAHAHA!!! Too good

Thank you for all the great information you've given us. Keep up the well researched and accurate reviews !!!

Hi Will i am just a old bloke in Australia 62 and have found your channel to be extremely informative upfront and honest so i am a big fan of your Vid's as the older i get the Greener i am becoming so we might have something left worthwhile for the grandkids. Hope you are well, cheers

Thank you for making this video. You have done a great job of providing useful and valuable information to your viewers who are interested in learning how to assemble solar systems with battery storage. There is no question that you know what you are doing and have put in the time and effort to learn every aspect of the chemistry as well as the safe and effective use of your tools and testing equipment. Keep up the good work and keep making great videos.

I wouldn't ever question you. I'm not that smart, but I'm smart enough to know you are.

First: Thank you for your great work here on this channel! I learned a lot about LIFEPO4 and checked A LOT of facts from different sources! Your work is really great and don't worry about those comments.... It's usually the same all over the net! Please continue the great and very informative work of yours! thx a lot and greetings from Austria

I love the consistency in the testing methodology....my "go-to" for trusted reviews. Thanks for the great work!!

Guy who says the high voltage cut-off per cell should be 4.2v does not know the difference between an NMC lithium cell and LFP cell....

consider doing these more often. I love reading the comment section and sometimes take my info from there because they speak with such 'authority', like they're in the know.

In my 30+ year career as an aircraft controls tech and then mechanical engineer and building automation the first thing you do is ignore anyone that starts off a comment with "In my 30+ year career...." 😉 Keep kicking ass and doing what you are doing (helping us all get a little less dumb). It is greatly appreciated.

I really like how your rebuttals are data driven and explained so well. No arrogance or anger on your part. Thank you for your videos. You have no idea how much they have helped me!!

This is one of my favorite videos, where everyone thinks they are an expert on social media and always have to be snarky about it, I love that you corrected them with the "facts" and "science", in such "anti-science", "anti-factual" or "alternate facts" times LOL thanks Will for your videos :)

Will, thank you for reading all the comments. Even the bad ones ,blasted out of the water, teach those of us that wish to learn. You have been and will continue to be the best source for unbiased info on lithium batteries on the web

Will Prowse don't let those arm chair "professionals" stir you up. I have followed your videos for a couple of years now. Your love for solar and all that goes with it is second to none.

Thank you for being so informative. Being a significant amateur about electricity, I have found your videos quite helpful.

I love how calm he is talking down to people hahaha. Miss his voice and the long-ass streams he used to make, glad he is doing fine. Really smart guy and everyone should take his advice when it comes to lithium batteries.

Never argue with Will. His knowledge is really good.

I'll admit I don't know the first thing about ANYTHING you talk about. I watch because I see the passion you have for sharing your knowledge. Maybe one day it'll get through my think skull. There is nothing greater one can do in this world than to share knowledge.

Will, you're proving that the saying, "a little knowledge is a dangerous thing" is alive and well. Your annoyance with the instant experts shines through in this video - good on you for responding quickly and effectively. Your videos are the best.

Soooo frustrating when comments like those are made! I deal with messages and comments like that daily and I sympathize. Thanks for this video! Hopefully it inspires some to do more research before posting. Yea, 0.2C discharge rate for capacity testing is the standard for Li-ion chemistries and it’s not hard to learn that with a bit of reading.

Hi, your are spot on with what you are saying in this video and the processes you use to test these batteries. Some people confuse lithium with lead acid and even think all lithium chemistries are the same. Ps, I am an electronic engineering that designs commercially available chargers for all different battery chemistries, thus if I was wrong about this stuff I would be in big trouble. Keep up the good work 👍

Thanks for your generous output. Cheers

Will, I love your videos and your attitude, don't let anyone with less or No knowledge ruin your day. Thanks for your teachings.

Hi Will - Nice video addressing this issue. I think some of the comments may be innocent in nature and wanting to learn, while others are made out of ignorance or even lazyness. There are so many different chemistries on the market now, it is naive to assume they all work the same. A common message I often give to my younger, less experienced engineers is READ THE DATASHEET. It is remarkable how many people disregard this basic information. Personally I really enjoy watching your videos and find them instructive. I particularly love it when you do a tear down and debunk the claims of some of these "fly by night" vendors. People seem to forget that if something is too good to be true, it usually is. Praise the good guys and call out the rats. Keep doing what your doing man, you are helping us all.

You sir have the patience of a god.🤣

"You have a right to your own opinion, but not your own facts". Will - I think people underestimate your intimate knowledge and expansive knowledge on this topic. Likely because of your age. However, you have a gift to not only "Geek out" in the details, but a sign of a real expert is someone that can put complex information into Layman's terms, and we all appreciate that, especially me! Don't let ignorance upset you, the fact that you came back to disprove ("educate") may have won you new fans, since you took the time to have a conversation, which is more of what we need collectively. Thanks for all you do, Will.

Love it. Call them out by name, and then intelligently respond to each. Most people just want to regurgitate some random bit of data that they collected from some random source...yet have no knowledge, experience, or understanding of a subject. People have lost their desire to actually learn. I come here to LEARN. When a source teaches me....then I return. 48 years old, business owner, engineering background, and still desire to learn about my field and other topics that I find interesting. Why does everyone need to be a know-it-all. Learn to LISTEN

This was a good video, put them on blast LOL

Thanks for being one of the few that maintains their integrity, Will!

I been watching for over a year now, and you REALLY know your "stuff". I got interested in this topic because of one of your videos. Continued joy and success.

So I bought a Lithium 200 amp hour battery off of Amazon for $1,300 to use with my two 200 watt panels. With 400 watts of solar and 200 amp hours of battery my van will have plenty of power 😃 . Thanks Will for the awesome information on how to set this up! My costs were less than $2k.

Good one Will. Throw it "nicely" straight back at em.

Lol. That was entertaining Wil! Keep making great instructional video’s for our enjoyment.

Very good Will! I really appreciate how you call out arrogant and cocky/disrespectful language, this type/tone of language often comes from a position of ignorance. I also like how you ask for people to show you proof that what they say is correct, shows that even with your vast knowledge in this chemistry you still have an open mind. Spot on!

Thanks for answering all the research questions we have while looking for our mobile 12v solar system. . Your easily understandable methods and teaching is what us non tech folks really need. Thanks a lot, well done.

Break-in a battery? It's not an engine bro LOL

*Searches comments to see if the accusers have made any new comments* ...nope!

Dude, Love your videos. Respect you as a knowledgeable solar/battery expert. Keep on making videos and educating and enlightening us.

Hi Will Thx for the vid. Being a Complete beginner with solar is confusing with all the misdirection on the subject. Having someone thoroughly knowlegable doing beginner videos is great. A separate playlist for beginners is top shelf.

lol, "watch the beginner videos" - Burn!

Some people think speaker wires need to be "broken in", there's no hope I'm afraid.

Hey Will, I'm one of your forum members who bought the 280ah cells for $482 to my door from alibaba, (Xuba web site). I learned how to setup a lifepo4 battery by actually following your build guide lines carefully and my battery works great, so far, I;ve only been working on it for a few weeks. Your information is right on if you read it carefully. If there are any confusing parts of the assembly, testing and programming the forum is a big help. Setting up the BMS program is a little tricky but that is because of the poor documentation of the BMS ... it takes a little trial and error to optimize for the way I want to use it. (give up a little capacity for more charge cycles). Anyway you're a great teacher and we appreciate your hard work. jjb (aka ...tomtilly)

Amazing Will. You do your fellow humans a great service with your committed, rigorous approach to testing. Thank you, thank you, thank you!

Will, don't lett these idiots affect you. You have great knowledge of thees battery's and systems. keep up the good work with educating us. Tb

I was told you need to top up the electrolyte with some distilled water. :)

Thank you for this video. Responding to comments was an excellent education for us newbies. Loved it.

I’ve been subscribed for a while but just stumble on this one. Wish I’d seen it quite some time ago as it would’ve saved quite a bit of confusion over my first time charging and equalizing some new EVE cells. Learned a lot here. Great video.

These comments just go to prove that you can't fix stupid.

You may need to leave specific links to your 'training wheels' videos each time. You can lead a student to text books but you can't make them think...

Mahalo, I'm learning and appreciate your straight forward testing with pro and con. Totally trust your opinion. A few years ago, with wrong advice from a local solar dealer on setting up a small solar system, caused a fire in my bus. So now I do my research, double check, and remain cautious on any product on the market. Again appreciate your honesty, and knowledge on these elements and products via your testing.

Hey Will! There is actually some truth to the "breaking in" certain lithium batteries. Yes, I read the battery university page. Winston and Thundersky used to be separate companies back in the day. Thundersky had its own website with english documentation. It stated that initial charge should be done to 4.2 volts. IIRC, when yttrium was added they lowered initial charge to 4.0V. I don't know if charging that high had any benefit though.. Why do I know anything? Well I have 49 Thundersky 90Ah LiFePo cells, made in 2009(!) in my EV :) Good content, subscribed.

Class dismissed!

Will, where are you!!! Its been a month and i don't mean to be a slave driver but i miss the content from this channel

Will, half of northern ca without power this is a great time to put your videos on Facebook advertising for these counties without power. Hundreds of thousands of people don’t have power for the next few days. I already put your video on my Facebook the one that is DIY solar system. God Bless

Absolutely the best info out there. Thank you for your time posting these videos!!!!

You tell them my friend.

"Physics is the law, everything else is a recommendation." Elon Musk, November 2019

Hi Will and thanks for all your great test videos, they did contribute inspiration for my song writing...

When watching (and enjoying) your educational videos I may only understand about 10% of what you are saying, but I have complete confidence in you. Clearly you know what you are talking about and, whenever I need to learn about solar charging and batteries, I turn to you first. Thank you, Will. Keep ‘em coming!

This video feels like an angry dad talking to his kids and he is very disappointed.

Lol.... all the Google University graduates came out on that video.

Touché Will! Henderson, NV is lucky to have you. Another smart move with climate and no state income tax. Here in Utah we could learn some things. Well I’ve got your configuration on my kitchen table and I’m buttoning up as we speak. My 400 watt panels are mounted not plugged in on my 1 1/2 inch pvc pipes ( portable stand to be used at the cabin or RV) we have 4 feet of snow on the ski resort we live on and a scheduled plan to BLM near Vegas in 30 days. You rock and my wife says your so dang cute too.

don't worry about it champ, your videos are my primary resource when I need to know something about LiFePO4, BMS, Inverters or charge controllers. I think what you're seeing is a manifestation of the Dunning-Kruger effect

"Because we're not getting rated capacity guys what are you thinking" pulled a chuckle outa me for sure. Way to make an extremely mature and calm "stfu" video for the doubters. Keep showing us the way good sir

BTW, re the "break in" comment: I noticed just recently when I received some aftermarket lithium camera batteries that the instructions said something to the effect that "full capacity not reached until 3 charges" or something. I suspect this is more about preventing returns (hey! I didn't get as many shots!) or the rather blah charger they provide or just accounting for user error or something. I do know the camera manufacturers ship their batteries in a state below full charge, and request the owner to fully charge before use, but I'd expect that has to do with not storing them at full charge, not some need for "break in." Thanks for the great videos, BTW!

Way to call out these people. It's amazing that they do not know the chemistry and/or discharge. Will I have to give you props on your educational info. Keep up the good work young man. Your work with this chemistry is unprecedented.

This cracks me up! These people need to watch and learn! You obviously know what you’re doing. I’ve watched a bunch of your videos and have learned a lot. One thing I haven’t seen you talk about is changing from lead acid to lithium in an RV and any precautions one should take and how this change will affect my ECM. My son and I are getting ready to get rid of my 4 house batteries and put in 2 new Battleborn batteries. Any advice would be appreciated or if you have covered this in a video please guide me to it, Thanks Will! I love your videos!

Will, Love your level headed responses. I get a lot of armchair quarterbacking on how to restore the Frying Pan Tower myself with most folks never putting their toes in the water or riding out on the tower any of the many hurricanes, I've been through. As a 100% off-grid location (just outside the USA off the coast of NC) I've had many years to learn what works and doesn't work. The best answer is to say what the truth is, and create a few canned cut-n-paste answers to the clearly foolish flamers, and ignore as best as you can :) You're doing great work! Keep it up! Richard

Thanks mate ! I learn so much from your videos over the years and always appreciate how you stick to the facts.Cheers Graham

Nice Will, this is why I watch your work I trust your knowledge I'm a beginner and could tell the people in the comments were obviously talking about lead acid or didn't know what they were talking about I personally appreciate the amount of effort you go to to educate your subscribers on how to build, buy, and maintain a system safely for years to come. Thanks Will.

A lot of people make a confusion between chemistry of Lipo or LiIon with LiFe, also they got stocked in Lead Acid era! You're doing a great educational job too!

Hey Will, I am still learning and I appreciate how level headed you are and I like that you respond to mis-information, Good job! I have also had troubles in the past when trying t oeducate some people who are "Hide-bound" in their thinking and will not accept new ideas and new concepts. Please keep it going and take care!.

Excellent job Will. I have watched all of your videos that I can find and have just ordered my first set of 8 batteries. Thanks you for all your had work. You have saved me thousands of dollars.

10/10 video. People trying to use their Google search knowledge against a person---who I consider---that is an expert in the field. It's hilarious. The Dunning-Kruger effect at its best. Love all your videos, man...I've learned a lot.

You're the most knowledgeable expert on lithium cells, solar and inverters I know of even 2 years later.