HOMEMADE PORTABLE POWER STATION #2

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  • Опубликовано: 12 сен 2024

Комментарии • 126

  • @twentysevenlitres
    @twentysevenlitres 6 месяцев назад +12

    Nice build - different from the tool box builds I've been looking at.
    One issue though - your main fuse is 100A. That's inadequate for your inverter.
    At 12V to get 3000W you need at least 250A. Assuming the Inverter runs 90% efficiency, that becomes 278A (call it 300A).
    Your wiring is good - the 1/0 AWG wire will do 300A and cope with start up surges.
    Your main switch is good (300A rated).
    Your batteries are good - surprised me actually, I thought "two batteries, that'll only be 200A", but 200A *each* combined to 400A is perfect.
    Upgrade to a 300A fuse (or 2 x 150's). Even then it may not cope with surge loads if the inverter is maxed out.
    Your other 2000W build requires 185A too, at 90% efficiency (call it 200A). Assuming it has the same main fuse.

    • @danniecurlett8702
      @danniecurlett8702 Месяц назад

      i thought inverters come with fuses built on them unless pure swine dont

  • @thomasblottman6741
    @thomasblottman6741 11 месяцев назад +7

    Thank you for showing how you mounted the board and showed the back of the board everyone else skips showing that. Everyone wants to show the nice clean front but skips the meat/structure you need on the back.

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад +1

      Hi Thomas, I really appreciate you watching. I'm glad I was able to get you interested in my build. Please like and subscribe, I'm trying to get to a 1000 subscribers. I try and release new videos every week. Have a great day!

  • @robertorivera6958
    @robertorivera6958 5 дней назад

    very good set up ,,,,,,, i got me the Vevor 5000w ,,,the dc controller , and 2 12v 100ah batteries also 2 solar panel of 200w ,,,, i still have it on the boxes ,,,, i was planning to hang up on the garage wall but your idea is looking better by the minute

  • @mannyfragoza9652
    @mannyfragoza9652 5 месяцев назад +1

    i had never seen anyone talk for 19 minutes without taking a breath...pretty amazing

    • @Matthews_Reviews
      @Matthews_Reviews  5 месяцев назад +1

      Thank you! 😊

    • @mannyfragoza9652
      @mannyfragoza9652 5 месяцев назад +1

      @@Matthews_Reviews BTW you have two great DIY systems good job

    • @Matthews_Reviews
      @Matthews_Reviews  5 месяцев назад +1

      @@mannyfragoza9652 I really appreciate it 🙏

  • @rgbuckl
    @rgbuckl 10 месяцев назад +3

    Outstanding video!! Great job on everything-explanations, materials used, filming, etc., as well as great ideas & tips.
    One of the best overall on the subject I’ve seen in years.
    Subscribed!! 👍🏻😉

    • @Matthews_Reviews
      @Matthews_Reviews  10 месяцев назад

      Hey thanks for the kind words that really means a lot! I'm glad that I was able to share my information with you because I've learned a lot from RUclips videos myself. Thanks for your Sub, I'm trying to get to 1000 subs by Christmas. :)

  • @JNOBODYOFFICIAL
    @JNOBODYOFFICIAL Месяц назад +1

    Car audio wire, I like it. John at sky high car audio has been my wire guy for many many years.

    • @Matthews_Reviews
      @Matthews_Reviews  Месяц назад +1

      Yeah I was a bass head as a teenager so I thought lets use great wire so I don't have any fires. lol Thanks for watching! Please Like & Sub I'm trying to get to my 1000 subs. Thanks again!

    • @JNOBODYOFFICIAL
      @JNOBODYOFFICIAL Месяц назад +1

      @Matthews_Reviews once a bass head, always a bass head. 😅 it took me almost 35 years of my life to finally get a vehicle in the air conditioned demo area at Spring break nationals, and that was a very proud moment for me. Lot of Heavy Hitters on the team and some great sponsors, made it a very very fun time of my life. And I'm not done yet the beast is just sleeping, and building different s*** LOL but I will return I don't think there will ever be a vehicle I own or a living room I have a TV in that I do not have a fairly impressive system. I'll help you get that thousand subscribers goal

    • @Matthews_Reviews
      @Matthews_Reviews  Месяц назад +1

      @JNOBODYOFFICIAL awe, that's awesome, man! I want to build a sound quality system for my RAV4. Hopefully, this fall once it cools down. You must be into it big time to make it that far, that's awesome! I know car audio has come a long way since I was in school. Anyways, thanks for your support. I really appreciate it!

    • @JNOBODYOFFICIAL
      @JNOBODYOFFICIAL Месяц назад

      @Matthews_Reviews I've got some pretty good connections man maybe we can talk one day. I'd be more than willing to help out with an SQ build, I've always wanted to do one myself and I keep telling myself that SQL is the goal with this system and it never happens 😅 DLS has some really really fantastic components as well as Focal (of course)

  • @Ulbre
    @Ulbre 11 месяцев назад +6

    I reckon this would power just about everything you could want on a weekend camping trip...and could be built more compact if that was the goal

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад +4

      Yes sir, you could definitely shrink it down and make it more portable but you might have to remove the batteries because they are kinda heavy. But you can power a ton of stuff. I was able to power a 12,000-btu midea u-shaped air conditioner for 11 hours. Thanks for watching. Please like and subscribe.

    • @la24dogg21
      @la24dogg21 11 месяцев назад

      ​@@Matthews_Reviewshow many of these would you have to hook up to run some hiring on like 240? Or can you already ?

  • @user-ol5rj8qn9o
    @user-ol5rj8qn9o Месяц назад

    Good idea about the sealed fuse holder, gasoline fumes and propane also are heavier than air and scoot around the floor looking for a spark. About the plywood backer board Matt, after a storm here in Florida people just throw out all the new plywood that they bought to shutter up windows, then I go around and pick up as many as I can to use around the house. Some people are crazy wasteful.

  • @lawrencedavidson6195
    @lawrencedavidson6195 11 месяцев назад +3

    I am currently running a single 100AH LiFePo4 battery and a 40amp Rich Solar charge controller.
    Those are two very nice well built solar power systems you got there!
    Greetings from Jamaica.

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад +1

      Hey, thanks for watching! Please like and subscribe. It's cool to see that people in Jamaica are watching! 😀

    • @sanwomashi1751
      @sanwomashi1751 11 месяцев назад

      @@Matthews_Reviews now 100AH LiFePo4 is the best (cost) option (DIY) - choose right solar controller - Philippines :)

  • @frederick6008
    @frederick6008 11 месяцев назад +2

    I just put two li times 230ah and rich solar 20a mppt in my van. Can stay out in the bush for min. 2 weeks running everything with no charging. I do have a 20a dc-dc charger and a 170w rich solar portable panel.

  • @oldvideos1
    @oldvideos1 10 месяцев назад +2

    Good video and setups! I did a similar one with a Harbor freight hand truck with my 12v system, i've upgraded now to 48V. your video came up on my home page :) have a good one

    • @Matthews_Reviews
      @Matthews_Reviews  10 месяцев назад

      Thanks for watching and I appreciate the support! Please like & sub I'm trying to reach my 1000 subs. How do you like the 48 volt? Is it harder to find inverters and other components? What about cost wise is it a lot more expensive? I like that its more efficient.

  • @simon359
    @simon359 11 месяцев назад +12

    The only thing I would’ve done differently, is to wire to a 24 V system and get a 24 V inverter. It’s more efficient. Also, you can run more solar panels with 24 V.

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад +7

      These are just my first 2 builds I'm sure I'll have a 24 volt system coming in the future. Thanks for watching, please like and subscribe.

    • @stevetuttle5472
      @stevetuttle5472 11 месяцев назад

      I agree, hope to see a 24v system w/2 batteries.

    • @visamedic
      @visamedic 11 месяцев назад +2

      I am glad I found this channel. I’m very much a DIY person, but electrical and solar just isn’t my forte. You got a new subscriber sir. Thank you .

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      @visamedic thank you for the kind words I really appreciate it!

    • @paulgoodwin2570
      @paulgoodwin2570 8 месяцев назад +1

      I kinda understand that 24V is more efficient “but” my devices are 12V so loss is now created by stepping down 24V down to 12V.
      Please explain why 24V or 48V is better when devices and appliances are 12v.

  • @darrell3643
    @darrell3643 11 месяцев назад +2

    Nice video and builds. I'm looking to do the same thing. That smart shunt was a really good find too.

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      Hey, I'd love to see you're build when you're all done! Yeah that Fusion TBD smart shunt is the way to go!

  • @MyWasteOfTime
    @MyWasteOfTime 11 месяцев назад +4

    Why do you run the positive of your charge controller directly to your inverter? This bypasses the battery shutoff which would allow a single location to shut your system down...

  • @ciliap
    @ciliap Месяц назад +1

    Man i'm glad you linked in, I'm seriously ready to build out a portable unit!
    Do you mind talking about as to why this is better than going with maybe a EG4 Rack battery etc?
    Thanks!

    • @Matthews_Reviews
      @Matthews_Reviews  Месяц назад

      I've never used an EG4 before so I can't really give you a detailed explanation. I like building my own portable power stations just simply because if something goes bad I can replace it. If I want to upgrade its capacity just get another battery. For me this is as simple as it gets. Plus since it's on wheels and a cart I could be mobile with it if I had to. I hope this helps give you a little information to help you decide what you like. Thanks for watching! Please Like & Sub.

  • @Africanspanish
    @Africanspanish 11 месяцев назад +1

    Good to see you here🎉

  • @g-whiz286
    @g-whiz286 11 месяцев назад +3

    That 200 Amp fuse seems to be undersized for that 3000 Watt inverter. At full load (3000 Watts), even at 85% efficiency and low battery (11.5V), that inverter going to want about 310 Amps. Maybe you sized it to protect your wiring (as you should), but you are limited to less that 2000 Watts before that fuse clears. A 24 volt string would probably be a better choice above 2000 Watts.

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      Yeah I'm dying to build a 24 volt system in the future I think it will be a bit of a learning curve for me but it will be more efficient. Thanks for watching, I really appreciate it! Please like and subscribe I need all the help I can get.

  • @GalloPazzesco
    @GalloPazzesco 5 месяцев назад

    Excellent video and comments section, thank you.

  • @fightswithspirits915
    @fightswithspirits915 11 месяцев назад

    Sweet build. Great briefing.

  • @ImASurvivorNThriver
    @ImASurvivorNThriver 9 месяцев назад +1

    Good job! Thanks for sharing.

    • @Matthews_Reviews
      @Matthews_Reviews  9 месяцев назад +1

      Hey man, I appreciate you watching! Please like & subscribe.

  • @KEOTMA1
    @KEOTMA1 11 месяцев назад +1

    You did not include any solar panel link. Very informative. Thanks.

    • @frederick6008
      @frederick6008 11 месяцев назад

      The Rich solar MPPT has connections for solar.

  • @MR-ub6sq
    @MR-ub6sq 9 месяцев назад +1

    19:06 I'm pretty sure that the manufacturer of the charge controller has thought through to the end of the aluminum cooling grid under the device, so that it is best to attach it directly to the base WITHOUT any kind of risers, as you have done. This additional distance to the mounting plate, which you "arranged" with your own permission, probably hinders the planned cooling, causing unnecessary turbulence in the air space of the device's cooling grid. When you install the device directly on the mounting plate, then there are only the vertical "whistles" behind the device, which work effectively as negative pressure in the upper part of the device - and thus the cooling air also flows smoothly.

  • @ciscokidfab7595
    @ciscokidfab7595 11 месяцев назад +1

    Practical advice. Thank you

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      Thanks for watching, please like and subscribe.

  • @sylversolis5982
    @sylversolis5982 18 дней назад

    Could you make a video of your solar array wired to this amazing build???

  • @Electronzap
    @Electronzap 10 месяцев назад +1

    Nice setups, good tips, I just subscribed.

    • @Matthews_Reviews
      @Matthews_Reviews  10 месяцев назад

      Hey I really appreciate the kind words! Thanks for subscribing, I'm trying to reach my 1000 subscribers by Christmas. Lol

  • @zalllon
    @zalllon 11 месяцев назад

    Good information in reference. Just a word of advice, when editing your videos, make sure you balance your audio as I had to turn it up for when it showed you sitting in your chair and then turn it back down when you zoomed in at the batteries, not the greatest experience when listing in headphones.

  • @REVNUMANEWBERN
    @REVNUMANEWBERN 18 дней назад

    10:45 Just drill you a hole in that board where the wire plug will fit through & you CAN plug it into the female close to the board

  • @stevenseigneurie5073
    @stevenseigneurie5073 Месяц назад +2

    Great video , what size wiring did you use for inbetween the charge controller and circuit breakers 8 or 10 ga?

    • @Matthews_Reviews
      @Matthews_Reviews  Месяц назад +1

      Thanks for watching, it was 8 ga Knukoncepts wiring. Please Like & Subscribe I'm trying to get to 1000 subs. :)

  • @jeffreyabercrombie
    @jeffreyabercrombie 11 месяцев назад

    Awesome

  • @markwhite6782
    @markwhite6782 11 месяцев назад +1

    I once placed 3 AA batteries in series to refil my flashlight. Theres a bunch of us tech geniuses out there I guess.

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      Lol 😆

    • @markwhite6782
      @markwhite6782 11 месяцев назад +1

      Only humor my friend. Your very impressive!@@Matthews_Reviews

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      @markwhite6782 thanks for the kind words! I appreciate you watching Mark, please like & subscribe.

  • @robert4027
    @robert4027 11 месяцев назад +1

    Awesome I love diy

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад +1

      Thanks for watching I have lots more videos coming out! Please like and subscribe.

  • @leonardovallecillo5303
    @leonardovallecillo5303 2 месяца назад

    Amazing I want I to make one if you put everything in the list I will go for it thanks so much your amazing

  • @tiborchren
    @tiborchren 11 месяцев назад +1

    You have two similar portable 12V power stations with Diy components that do not communicate with each other and have no monitoring.
    A third could be with an All-In-One inverter and maybe a Server rack battery and Solar Asssistant monitoring system, and a fourth all Victron with Rpi Venus OS.
    Then you could test them all differently, upgrade them and compare not only the components but also the monitoring and how they work together, communicate/not communicate etc. ...
    The third and fourth portable stations could be 24V and 48V alongside these two 12V ones as well and build Diy LifePO4 batteries and review different BMS and test them on limits, which not many people do. On the other hand there are many channels that show different Diy components all over again.

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад +2

      You never know what I will build. There are lots of options out there. I just like the DIY power stations because they are affordable for the average guy. I appreciate you watching, please like and subscribe.

  • @earthenergyhex
    @earthenergyhex 7 месяцев назад +1

    great video

  • @westtechguy
    @westtechguy 10 месяцев назад

    Nice setup being portable and lots of power, depending on how hard it is to get outside of the house to the garage and back inside could be a deciding factor. Wouldnt want to lift it to the back of my SUV if its got three 200 ah batteries unless you have lots of help. I was thinking of a dolly with bigger tires and taller with welded metal supports added on my version, still in the planning stages though I do have most of the parts. Might be nice to add re-usable cable restraints for when you plug cords into that strip, velcro maybe? Where's the 12v side of your system, lots small car tools, lights, phone chargers use that so could be worth adding? Wonder if disconnecting the solar chargers while not using them will lower your idle draw with just the inverters and some have an ECO mode to lower it more.

  • @stedyone1090
    @stedyone1090 5 месяцев назад +1

    Nice.
    Surprised 2nd unit is not 24v

  • @kalypsoisland
    @kalypsoisland 7 месяцев назад +1

    Thank you. Helpful.

    • @Matthews_Reviews
      @Matthews_Reviews  7 месяцев назад

      Thanks for watching! Please like and subscribe! 😋

  • @Barc7580
    @Barc7580 10 месяцев назад

    Couple questions, what size solar panels do you use to charge the new system? And do you ever charge the batteries on the new system with grid power ? Glad I found your channel.

  • @frederick6008
    @frederick6008 11 месяцев назад +2

    Funny, at the end you said, you bought through amazon. I went to their website, tried to order it there. Wouldn't work. Next day, i tried through walmart and card wouldn't work. Called bank, they shut down my account because i was doing commerce with Hong Kong.
    They issued me a new card and i got the batteries through walmart. Weird.

  • @REVNUMANEWBERN
    @REVNUMANEWBERN 18 дней назад

    How many hours would that setup run just a refrigerator? and CAN & WHERE would one plug a gas generator into it to charge the batteries?

  • @Firephosure
    @Firephosure 5 месяцев назад +1

    For your 2nd system, since you have 2 12v batteries, you should have gone 24v. It's just better all around.

  • @cabin56
    @cabin56 10 месяцев назад

    HI. LOVE THE PORTABLE POWER STATION I AM BUILDING ONE. ONE THING IF YOU TOOK THE BATTERY'S OFF WOULD THE FRONT WHEELS OF THE TROLLY LIFT OFF THE GROUND HAVING THE WEIGHT OF THE INVERTER AND CHARGE CONTROLLER +

    • @Matthews_Reviews
      @Matthews_Reviews  10 месяцев назад

      No, the wheels stay on the ground. Thanks for watching, please like and subscribe.

    • @cabin56
      @cabin56 10 месяцев назад +1

      Thank you keep the good work up@@Matthews_Reviews

    • @Matthews_Reviews
      @Matthews_Reviews  10 месяцев назад

      @@cabin56 Thank you for watching and motivating me with those kind words!

  • @BobBob-il2ku
    @BobBob-il2ku 8 месяцев назад

    The server rack form factor seems better suited for these cart type builds but there also a lot more $
    🤔

  • @mikedevita5558
    @mikedevita5558 8 месяцев назад +1

    Matthew,
    What is the height of the vertical board attached to the Franklin cart on the 2nd build? Thank you.

    • @Matthews_Reviews
      @Matthews_Reviews  8 месяцев назад

      It's 39 inches. Thanks for watching Mike. Please like & subscribe.

    • @mikedevita7184
      @mikedevita7184 8 месяцев назад

      done,...plus I'm modeling my build after yours. I like the portability@@Matthews_Reviews

    • @mikedevita5558
      @mikedevita5558 7 месяцев назад

      ​@@Matthews_ReviewsHow is your fuse holder secured to the top of your battery? And just curious what amp fuse does your system have, and do you run the charge controller and inverter through It? Thank you sir.

  • @dheller777
    @dheller777 4 месяца назад

    Are you running a negative wire from your solar controller directly to the negative post of your battery? I was always told not to run anything to the negative post other than the wire going to your shunt, or you will not get correct readings from the shunt. I have been told to run it to a bus bar along with the load side cable from the shunt. Is this correct?

  • @MikePizzolatt
    @MikePizzolatt 8 месяцев назад

    great video, are the batteries hooked in parallel or in series? thanks. I"m new to all of this and looking to get started. thanks again

    • @Matthews_Reviews
      @Matthews_Reviews  8 месяцев назад +1

      Thanks for watching Mike! The batteries are in parallel. Please like and subscribe. I need all the help I can get.

    • @MikePizzolatt
      @MikePizzolatt 8 месяцев назад

      Already Done. thanks@@Matthews_Reviews

  • @REVNUMANEWBERN
    @REVNUMANEWBERN 18 дней назад +1

    You mentioned Georgia, what county are you?

  • @quickeagle7308
    @quickeagle7308 11 месяцев назад +1

    What was the total cost for this system?

  • @BobBob-il2ku
    @BobBob-il2ku 8 месяцев назад

    Victron dropped there charge controller prices 30% hard to beat them now with the new price structure

  • @MR-ub6sq
    @MR-ub6sq 9 месяцев назад

    Hi Matthew. How much did your 12V 200Ah LiFePO4 batteries cost?
    I think it's not worth and right to buying them, because "home made" must also cover making the battery yourself. And my understanding is that those battery cases have at least 30% empty space inside them. I had ordered 8 pcs 307 Ah (nominal 280 Ah) cells, the dimensions of which are about 70mm x 170mm x 210mm, and when I put four of them together, I get a 12V 307Ah battery, the total dimensions of the cells are about length 290mm x width 170mm x height 210mm. And together with the JK-BMS device, they cost around 500,-

  • @johnloudermilk3217
    @johnloudermilk3217 7 месяцев назад

    I am looking for some help. I bought a portable power station and it says no more than 100 watts on input. I have a 100 watt solar panel but on cloudy days I may get 30 watts. What I thought about was getting a second 100 watt panel and combining them or just a 200 watt panel. My issue is I can't find something to limit just the input to 100 watts. I have no idea what battery it has inside the station. Any help would be appreciated.

  • @Aman-Engineering-Academy
    @Aman-Engineering-Academy 24 дня назад

    What is the cost of pure sine wave inverter?

  • @eduardonieto2355
    @eduardonieto2355 11 месяцев назад

    That is cool my friend.

  • @SM-by3hq
    @SM-by3hq 11 месяцев назад +1

    Did you happen to give a price cost estimate on these?

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      I didn't, but I listed all the parts in the description. Thanks for watching, please like and subscribe.

  • @danielvaldez3778
    @danielvaldez3778 10 месяцев назад +1

    Is it possible for you to show your solar panel system

    • @Matthews_Reviews
      @Matthews_Reviews  10 месяцев назад

      I will try and get a video up soon my friend. Thanks for watching! Please like and subscribe.

  • @samuelochieng1491
    @samuelochieng1491 5 месяцев назад

    Where can i get those items how much

  • @phillipleekit9463
    @phillipleekit9463 11 месяцев назад

    Why are you using a 200A fuse and u have around 2x 12v x 200Ah batteries, wouldn't that limit the current you can use

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      Hi Phillip, I just had a 200A on hand so that's what I used till my Amazon order arrives . But you are correct it can limit current. Thanks for watching, I appreciate you're help! Please like & subscribe because I have a lot more content coming out every week.

  • @panospapadimitriou3498
    @panospapadimitriou3498 11 месяцев назад +1

    you can call em solar too !!!

  • @user-yu6po9mi4h
    @user-yu6po9mi4h 4 дня назад +1

    Владимир 56 моя покупка панели на Ютубе

  • @buzz1843
    @buzz1843 11 месяцев назад +2

    VCR… lol

    • @Matthews_Reviews
      @Matthews_Reviews  11 месяцев назад

      Hey, I'm old school! 😆

    • @buzz1843
      @buzz1843 11 месяцев назад

      all good@@Matthews_Reviews

  • @tomdemeo2708
    @tomdemeo2708 6 месяцев назад +1

    VCR 😂

    • @Matthews_Reviews
      @Matthews_Reviews  6 месяцев назад +1

      LOL I'm older then what I look. lol

    • @tomdemeo2708
      @tomdemeo2708 6 месяцев назад +1

      I’m young use cd 💿 😂

    • @Matthews_Reviews
      @Matthews_Reviews  6 месяцев назад

      @@tomdemeo2708 hahahahahaha 🤣 😂 😆

  • @quickquote1568
    @quickquote1568 7 месяцев назад

    Unfortunately you chose the worst possible inverter tech for your build. High frequencytransformerless inveryers luke these provide a very short life expectancy, especially when powering household insuctive loads like refrigerators, microwaves, portable AC, units and power tools. A much better choice would be to purchase a low frequency, transformer based inveryer charger. It will last you many years longer and you wont have and problems powering inductive loads.

    • @Matthews_Reviews
      @Matthews_Reviews  7 месяцев назад

      I agree that low frequency would be better but they come at a much higher cost compared to high frequency. But I've done just fine so far with my high frequency inverters because I run my inverter AC unit and small space heaters on them year around and they haven't failed me so far. Thanks for watching! Maybe sometime I will have a low frequency inverter that I can bring to my channel and test it out . Have a good day!

  • @eddiemoreira2913
    @eddiemoreira2913 11 месяцев назад

    very good 😉

  • @kauaikit
    @kauaikit 10 месяцев назад

    Ummmm....and you didn't go to a 24v system on your "second" build, and what Solar size/watts are you using?