Attention: If you want the cheap price in the video, you have to add the batteries to your cart. Not sure why they did it this way. Links are below: Product Affiliate Links: 12V 100Ah Budget Battery: powerurus.com/products/powerurus-12v-100ah-lifepo4-deep-cycle-rechargeable-battery?aff=2 12V 200Ah Budget Battery: powerurus.com/products/powerurus-12v-200ah-lifepo4-deep-cycle-rechargeable-battery?aff=2 24V 100Ah Marine Trolling Battery: roypowcell.com/products/roypow-24v-100ah-lifepo4-battery-for-trolling-motors-and-fish-finders?aff=5 36V 100Ah Marine Trolling Battery: roypowcell.com/products/roypow-36v-100ah-lifepo4-battery-for-trolling-motors-and-fish-finders?aff=5 0:00 24V Marine Trolling Battery 1:37 Tear Down 8:06 $400 Budget Battery 12:30 $400 Battery Teardown 15:49 Conclusion ~~~~~~~~~~~~~~~~~~~~~~~~~ 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

I love it when you get suprised by high quality! It’s so rare to see companies do things “well”!

As someone who's lived offgrid for 20 years, having temp sensors on the terminals is a really good idea. Can't count how many times a bad connection at the battery caused problems that went unnoticed until it got bad enough that the glow at night alerted me. Battery teminals are a common place for bad connections.

I respect that you still published the video even when you screwed up and let the smoke out; LOL! Part of the definition of craftsmanship is ownership....even when you have an "ugly baby!" This is why so many companies utilize you as a proxy "proof engineer," and why I trust you implicitly! Also, resistance produces heat. I had a professor who stated 99% of all electrical problems are due to "connections." Temperature surveillance at the main external connections, is a brilliant method monitoring basic maintenance!

Getting into solar have been watching your videos for a couple years now. Not only funny sometimes but a blast to learn and easy to learn thanks for all you do keep up the great work !!!

Your integrity is outstanding. Few folks show their mistakes, but you have the confidence and presence to do just that. Great video. Keep up the great work.

Good to see a company not just chasing price but also putting out quality, should help the industry in the long run.

Really good to see that you didn’t hide the fact that you screwed up on reconnecting the BMS. I appreciate such honesty. Keep up the excellent work. I look forward to seeing future reviews on Roypow.

I'm hooked on your channel!! It and you are awesome for doing these videos and teaching!!! I'm wanting to build a solar system for our house and you have been a blessing!!! Still learning and researching to understand it better and your channel and knowledge is outstanding!!! Thank you very much!!!

I am so envious of Will's workshop. Someday maybe we will get a tour... And before I got into solar power and batteries this wouldn't have been on my favorite view list but I absolutely love battery reviews now!!

We’ve been selling the golf cart replacement batteries for a few years now. They do have specialized brackets for the more popular carts. We have sold probably close to 200 with a few failures but not many. Most failures were early on. They do have good support. They have sent a tech to us to repair failed batteries.

Your excitement is contagious :) Thanks for the great educational info, went with 3 of the 12v 100ah to replace old Lead Acid batteries on my skoolie.

Will, when I disconnect things from unknown manufacturers or in language is not familiar to me I take colored marker pans and on one side of the plug I put a line straight across the two pieces that way when I go to hook it back up I can quickly and easily see that I'm putting the right plug in the right orientation in the right place. You might want to consider this when you're doing teardowns and avoid the problem you just had on this Roy Pow battery

I've had one of their 48 volt 100 amp golf cart kits in operation since the first part of the year and it is awesome. I run the snot out of my cart and this thing just keeps going.

Will, thank you so much! This quality and price is exciting. Looking forward to your roypow follow up tests. Blessings 🙏🏽🕯️

You’re the cool dude we all wish lived next door to us. These videos are GOLD

I put a 36v Roypow lithium battery in my golf cart a couple of years ago. I'm very happy with it. I bought a little Genasun 8 amp mppt so I can top off the charge with a panel on the roof.

Awe man, They almost sent me their trolling motor battery for review but backed out last minute. Now I know why. I was hoping to get a golf cart battery instead but I guess that's not happening 😓 As always great video Will 👍

So glad I found your channel, starting a van conversion with solar. Your book is on the way too. 😊

It appears it's been a while since you've been impressed by new products & your enthusiasm is contagious! All beyond my capabilities but very interesting to watch & learn. Thank you for the exceptionally clear video.

Will, great work. I always look forward to your excellent reviews!

A rare and pleasant surprise Will! I say "Test 'em ALL"! - Cheers!

Will, thanks for the great content. It always a pleasure to watch your videos.

Great job on the benchmark for the battery, I hope you get the marine battery soon that one looked really nice.

I'm very impressed and amazed ! Excellent review. Now that I've seen this video I actually consider buying one of these !

I'm always impressed watching your videos. Also I learned a lot every time. I highly recommend you 👍

Two videos in 2 days?! Keep them coming!

What a fun video - you went marine - love it - thank you :)! Looking forward to the next installment :).

Love the excitement! The marine battery looks really nice. And at $1300 for a 24V 100ah, that is still a super competitive price (compared to 12V 100ah). For a marine battery though … that’s outrageously cheap. Can’t wait for the capacity test. It’s most likely going to pass . Looks like this company makes batteries for industrial and construction equipment and vehicles. That’s a hard environment. I’m not surprised about the consistent build quality.

Eventough the test is somewhat complicated to me, i am impressed with what you have now. Great test for non-tech person like me.

Man I love your reviews and trust them. Would like to see you test those golf cart batteries. That would be awesome.

Will, what would have been interesting is to have looked for heat on the outside of the case where the bms resides. That goo on the heat sinks may actually move the heat to the outside world instead of a trapped dead air space within at best heating the batteries. I don’t know if you have one, but I highly recommend the FLIR thermal cameras. I use a dongle for the iPhone and it works great.

I'd love to see you do some of our batteries made available here in Australia such as the Deep Cycle Systems batteries or the iTechWord batteries which seem to look a bit like a Chins battery you have had on the Channel before. I can't imagine the testing you do is cheap but love the content you put out. Always super informative 👍

Nice work, Will. Glad you're back

Just bought a roypow 30 amp battery. The battery I received is below 3 volts on delivery, and obviously used. It has abrasions and residue on the face of it.

As always top class informative videos, ever considered Will doing a boat 12v/24v set up, as I am sure alot of your viewers are from this community, as alot of us try do our own boat Solar setups and have 12v and 24v instruments on our boats. Keep up the great videos 👍

That’s a good object lesson: take pictures and label connectors before beginning disassembly. I suspect we all can relate similar experiences.

Finally a brand you've done that exists here in Australia! (update it's only really the golfcart ones, and they are like $4k bummer)

Wow! Will was impressed with the build of this one... Guess it will work for me just fine.

This was so great. I love how this battery shocked you in everyway with built quality and down to there website. I did an overview on their 12v 30ah on my channel and honest loved it.

Love the video. Looking forward to the roypow golf cart battery review.

I bought an Epoch 36100H for my golf cart. Same packaging as RoyPow from the outside. I has a heater so I can charge below freezing. They advertize 100 Ah but in reality it is a 105Ah. nice to see them underestimate in their adveertizing instead of the other way. On /Off switch. Wifi enabled . Meter that alarms when you get low in power and a second alarm so you won't run out of power getting home. It can run up to 120 amps continuous and 200 for a very short time. it works for my 2002 EZGO TXT series cart with larger tires. Thanks Will for letting me see the quality of the next generation 36v golf cart battery.

Will did make the magic smoke escape. That is a talent I would never have suspected from him. 😂

I have a Golf Car (old 48v Club Car DS) & a RV @ the beach. I keep my Golf Car in my 12 X 16 shed. It would be awesome if you could use your ingenuity & know how, to create some videos, where you teach us how to make 48V off-grid systems from a 48V Golf Car. Don’t forget to add some solar panels to your roof to plug into mix as power supply. This would be relevant for those of us that have beach property part-time, full-time, or live around golf courses. Love your show… even though I only understand 1/2 of what you saying 😆….

You're my Go-Too Guy on Batteries and Puff and Stuff!

Thanks! Always fun to watch these..

Pro tip, test the batteries before disassembly, LoL. hate to see that happen, love the videos keep them coming!

THANKS Will !!! These will now sell out before I can grab a couple.😯

Ya, I like the video. The fact that you make a mistake and didn't hide it or skip them. We all learned from mistakes and mistakes made us better . Your mistake you highlighted benefitted us.

I really like your full review on a product.

I still love my two 200 ah Lossigy batteries. Thanks for the video.

Excellent review as always. Thanks!

Excellent review and analysis! Thanks.

i like the way they hold the cell together

RoyPow just sent me their 30Ah. It barely pulled capacity and I plan on tearing it down this weekend. Hoping that it looks as good as their 100Ah! I did teardown their 6Ah for fish finders. It was a mess, the cell holders were all gooey like they were melting.

I generally mark parts and take pictures when I take something apart for the first time. Get some stickers and lable thing with numbers, letters, or colors. While taking lots of pictures with your phone. Saves a lot of hassle when putting it back together.

Rubber on the heat sink fins and batteries is probably intended to sink the heat to the case. Try checking the thermal conductivity of the rubber or rubber foam. Air gapping heat sink fins inside of a sealed case is a recipe for disaster too. I suspect the material is working as heat sink compound.

Thanks for investigating this trolling motor battery. I am in the market to switch from AGM to LiFePO4 and your tear-down videos have been very informative. My only request is that you add Ingress Protection testing to your mix of tests. In a marine environment I would like to see if any water "gets in". Maybe, before you open it up, you could spray it with a water hose (IP65) or submerse in a bucket (IP67), then see if any water is inside when you open it up. What do you think about this suggestion? thanks again,

Always good to mark things when you take them apart

making mistakes is part of the learning process. we've all been there and still make mistakes. that's why label label label. try assembling it again, it might not be dead but be safe can't wait till update when you get another one 👍

Suggestions, Test before disassembly/breaking Disassemble and evaluate Retest Great information!

Always enthusiastic. Love your work in keeping us informed.

I thoroughly enjoyed the video, you seem to be pleased with the construction of the 12v 100ah battery. In Oct 2021 you did a teardown of the Weize battery that had low temp charging protection, do you still recommend that battery? Lastly, have you had a chance to look at the Lisuateli LifePo4 battery yet? It's going for $309 on Amazo now. Keep up the good work.

"This is battery porn." I burst out in laughter as soon as you said that. But, yeah this why we tune in, Will. So good to see you posting again.

Love the mariene grade battery review!!!

The rubber on the BMS heatsink in the cheap battery is probably still better at conducting heat to the outside that air would be, i.e. by filling the heatsink fins up with the rubber glue they likely achieve at least a certain amount of thermal coupling to the outside world. Of course, being a sealed system, it will always be difficult to get rid of the heat and a heatsind without fins that is directly glued to the outside surface of the battery casing would likely be the better alternative.

Thanks, great job as usual.

Will, Your the greatest. Thanks for the info.

Thank you for all you do

Hi Will, as always, very nice review and it made me smile, that even you get a surprise every once in a while. Are there other LifePO4"Marine Batteries" on the market that you are aware of, besides Mastervolt, which are un-payable? I am considering to recommend a change from AGM battery banks on a boat of a friend of mine in the Caribbean and all these normally found soft metal (rusting) enclosures wouldn´t be recommendable due to corrosion...

Temperature sensors on the terminals work great to measure internal battery temperature as the terminals transfer the internal heat efficiently

i wondered how long i would have to wait to se magic smoke...lol. keep up the great videos. watch every one.

The two comms ports are so that you can have a dashboard battery monitor connected AND a diagnostics port presented somewhere without interfering with each other. The golf cart batteries only have one port so you have to unplug the gauge before being able to talk to the bms with a pc.

LOL, maybe from here on you should test the batteries before ripping them apart. Love your content, thank you!!!

Roypow has a C48100A Marine Battery with an interesting Cable design. 48V 100ah IP65 Hopefully it works great. Hope to see a video from you on it.

Can't say I wasn't expecting you to mix match the cables when you were putting it back together... Lol

One of these would be great for replacing my lead acide battery in my bolt. Also running my subwoofer amplifier.

I could be mistaken but that rubberized material looks like it could be some sort of potting material which could help with thermal transfer to the outside of the case instead of the heat being trapped inside the air in the case, would be interesting to see performance results with and without that material to see what the temperature difference is at full load until it is completely discharged, maybe the company could send you one with and without that material for testing

I run a roy pow battery on my golf cart. It has been excellent for me.

That's a nice battery.. I made my own for under 300$ 105ah no bms because I use a balance checker alarm. It's for my trolling motor

Fun to watch you pull these apart. Hey Will can you look at moseworth batteries, I have a couple 200ah 12v running and would like to buy a couple more and would appreciate your feedback on the build quality before spending the cash on them. I believe moseworth made smaller lithium packs for the rc market. These 200ah are sold for trolling motors and are at a pretty low price point on Amazon. I appreciate your poking around the market for all of us trying to go off grid.

Enjoy your informative videos

Too bad you smoked the BMS. I bet that would have pulled capacity. Quality build from the look. Looking forward to the RoyPow-2.0. Thanks for sharing

Just a thought. Maybe mark the wiring connections and battery placement before disassembly. If all else fails take a picture something you can revert to for reassembly. Like your videos really wanted to see the marine battery test results.

Their website has so many misspelled words that I would not buy from them because I would question their quality. My first thought was it was a Chinese company and if the quality if their battery is the same as the quality of their website, it would not be worth buying. This review changed my mind.

The heat all has to go through the case either way, If that gunk on the heatsink was connected to the case it might help with heat.

Nice, Good tear down.

That heat sink is probably designed that way intentionally to allow the heat to exit the enclosed system through the battery casing itself. Otherwise, a heatsink in an enclosed system touching only the enclosed air can only reliably exchange heat with that trapped air.

A temp sensor on the wire connectors seems like a good idea to me. Wires get hot on a big load so why not?

Outside Terminal Heat Sensors without low temp cut off makes sense since the terminals can be cold from the environoment but inside cells are still warm enough. Detecting terminal overheating due to poor connection quality with loose screws and maybee overcurrent drawn is realy smart. As long as the inside cell Temp Sensors cut of charging below Zero all is good. Only one sensor for low temp cutoff is still a bummer. since if this one fails you dont have a spare. The Heatsink in the Rubber gives some body heattransfer to the outside. Better as just air arround inside the thight case working as thermal insulation. (Some newer Toolbatterypacks do this with the Plasticasing arround cells. Eliminating Airgaps between cells and outside shell even a poor thermal conductor like plastic is better as just air. The "cheap" encasing is nothing to worrie about as long as it matches outside dimentions of standard batteries abd got carring straps. As you see on the outborad batterie case the mounting wing take space some might not have in their batterie compartment. It would be nice to have a Inside x ray like view of the batterie for the customers or a clue where the bms heatsink is. This side is the point where you might put watercooling pipes for the batterie pack or press it against a tankwall or you might put a thicker metal plate (aluminium) onto an encasing as a heatsink.

I love your humor…

Comment for the algorithm - keep up the good work bro.

Thank you for this!!

yay love it even Wills voice sounds impressed :)

Great video Will. I would like to see the differences between RoyPow's 105 Ah for $650 and 100 Ah for $600 that was in this video.

Love how you tear these batteries apart. Too bad you swapped the cells and burned that one battery up. It will be interesting to see how it tests out once you get another one.

Great review, & I think it's time to add the final testing as you are getting heated batteries and not testing that function. Here is why. Some of these heated batteries cut off the output current when there isn't enough input current for the heaters, effectively leaving you with no power at all... Is that true of your now smoked 24v trolling battery?

I appreciate you showing the mistake you made- it’s humbling but always nice when it’s the BMS rather than the cells 😂

It’s possible that the potting material is heat conductive to help with cooling:)

I bought two of the 12v 100ah Powerus batteries. I charged them with the same Aims 75a charger @ 48-49 amps. It took about 1hr 40 minutes. According to the app they are 100%. I was expecting to need to to use my 10amp power supply to finish the last 10% to balence the cells but the Aims fully charged them. I have not load tested them yet as I am waiting my Victron shunt. The cells are within .004 of one another on both batteries at average voltage of 3.575v on one battery and 3.355 on the second battery.