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  1. Rednecktek

    Parallel Lead Acid Batteries

    How many feet of cable is it to do the wire tangle? Also, more batteries is always a good option. :)
  2. Rednecktek

    MPPT Charge Controller

    DC fuses should have a range, say 10-100v or something. Your fuses should be fine.
  3. Rednecktek

    Which panel to for my Solar Suitcases: Newpowa or Nature Power?

    They're $409 at my local HD... :(
  4. Rednecktek

    Parallel Lead Acid Batteries

    No, I mean instead of all the wires going back and forth between the batteries in a tangle, just getting a couple bus bars and taking each battery to the bus bar individually. Then your cables could all be the same length in whatever length is convenient for cable management and access without...
  5. Rednecktek

    Parallel Lead Acid Batteries

    Have you thought about bus bars?
  6. Rednecktek

    MPPT Charge Controller

    Avoid Renology, they're tanking and probably aren't going to be around much longer. After that I'd look at the EPEver's for budget or Victron if you want the fancier options like Bluetooth and internet access and such.
  7. Rednecktek

    Getting Started in Ghana

    You'll want a 125a fuse between the battery and the Growatt for safety to start out with. As you add more panels in the future you'll probably end up getting a combiner box to bring all your strings together (so you're not trying to stuff a bunch of wires into a single port) and when you get to...
  8. Rednecktek

    Getting Started in Ghana

    Oohh, this is going to be tight but might be doable. So basically the plan is "Make all the system I can on my budget now and see what works"? OK, that works. The Growatt and the battery are going to be about $3000 right out the gate, which leaves you about $2,000 for the panels and hardware...
  9. Rednecktek

    30W Panel for a 24V motor

    I'd be impressed with any 30w panel that could get voltage up high enough to actually feed a 24v system, you usually need about 30v to even start charging.
  10. Rednecktek

    MPPT Charge Controller

    Well at a 150v PV input you could do 6s strings and a lot of those in parallel. Just sayin'. :) At that point though you're running into the capacity of your battery bank to take the charge. 12v system, that would be 60a X 12v = 720w. On the same controller running the 24v system you would...
  11. Rednecktek

    Getting Started in Ghana

    Well, I'll start the default answer to these questions and we can work from there. Here's you To-Do list: 1: Power audit! This will give you some important information on how big your inverter needs to be as well as how much battery capacity you'll need. There is a link in the FAQ section (I...
  12. Rednecktek

    MPPT Charge Controller

    It's usually worth the price to get your unit either from a reputable dealer online or Amazon. Ebay is more risk than it's usually worth and their "warranty" is usually worth the paper it's written on.
  13. Rednecktek

    Bluetti AC200P, RIP. What can I scavenge from this unit for a layperson? thanks!

    That looks like some sort of anderson type connector. Can you feed it some power through that and see if the batteries take a charge? If they do and the BMS proves to be working then it seems like taking out the extraneous plastic and just using the plug in Picture-4 would be the easiest way...
  14. Rednecktek

    MPPT Charge Controller

    Somehow I missed it when I was doing my search. Post has been updated. Good catch!
  15. Rednecktek

    MPPT Charge Controller

    The Victron is listed as a 60a SCC, and I was trying to get a broad comparison of 60a units as a rough reference line.
  16. Rednecktek

    MPPT Charge Controller

    Well, let's see what a 60a controller runs roughly: Morningstar 60A is just shy of $700 Victron Tr250 is about $640 Victron Tr150 is about $400 Midnite Solar MNMPPT60DIY is a good higher-mid range price at $435 MPP Solar PCM60x is a bit pricy at $300 EPEver 60a is about $230 and is a very...
  17. Rednecktek

    100ah vs. 200ah

    2x 100ah give you some redundancy, single battery is easier to pack. Cost wise I think the 2x batts are a little cheaper usually. If I had the space I'd lean towards the dual batteries for redundancy. At least then I can still power things while I'm waiting on a new battery to arrive in the mail.
  18. Rednecktek

    MPPT Charge Controller

    Personally I prefer the mid-range units like the EPEver's and HQST and such, although my current two are the PowMr's because I didn't know better at the time and I was on a budget. They're working so far but I bought a HQST for my next project since I needed a little one anyways. I've just...
  19. Rednecktek

    MPPT Charge Controller

    Well your VoC is 22.4v so with your 2s/3p setup you're running 44.8v and 28a to your controller. Even if you rewired it up to be a 3s/2p setup you're still well within the voltage range of pretty much any decent MPPT controller. The only issue is that most controllers are limited on how much...
  20. Rednecktek

    MPPT Charge Controller

    Yes, the charge controller should auto-detect the battery voltage and set itself for that. The panels can be any voltage up to the limit of the controller and it will do it's own magic and convert that to the 12v system. You'll probably get a bit more power through the day by doing the series...
  21. Rednecktek

    I need help

    Well, I'll start the default answer to these questions and we can work from there. Here's you To-Do list: 1: Power audit! This will give you some important information on how big your inverter needs to be as well as how much battery capacity you'll need. There is a link in the FAQ section (I...
  22. Rednecktek

    Adapter for using normal 16awg extension cord 110v-120v for solar?

    If this is going to be a semi/permanent install, you could just re-head the extension cord too.
  23. Rednecktek

    Adapter for using normal 16awg extension cord 110v-120v for solar?

    As long as you get your polarity right on the spades there's nothing stopping you at all. It's just another adapter, although a much more convenient one for most homeowners. :) Would you need to do a nema -> MC4 for the charge controller? Most of those are just screw terminals so you'd just...
  24. Rednecktek

    Nature Power 215-Watt Monocrystalline Solar Panel - feedback please

    $154?!?!? Take it and run!!! I don't have that option at my Home Depot. :(
  25. Rednecktek

    Too ignorant to know what I don't know???

    Something else to think about is that some of those regulation issues might come into play as you may very well be required to use a licensed electrician to install and connect those to the grid. There have been a few threads trying to find an electrician that will A: install your panels and B...
  26. Rednecktek

    Which panel to for my Solar Suitcases: Newpowa or Nature Power?

    How many panels are you planning to use? PWM or MPPT? What's your sunlight situation? Series or parallel? If you're going single panel or parallel go for the NewPowa as the max current is higher, If you're going for series and MPPT get the Nature Power as it has more voltage range for the...
  27. Rednecktek

    I'm having an idea for off-grid heat... doodle check?

    Yeah, I've already got two of those units installed at my camp, a third as a "Cold Spare" in a toolbox, and a set of extra parts (gaskets, glow plugs, etc) with the allen wrenches and screwdrivers it takes to open them up. The entire Appendix B of my camp's user manual is a step-by-step with...
  28. Rednecktek

    old grandpa

    Absolutely! With wire lengths being exactly the same length as a best practice, going to a bus bar is a really good practice to make that happen easier plus it makes wiring in "All The Things" having those extra mounting places comes in handy.
  29. Rednecktek

    Is my SCC dead or something else?

    Yesterday it got up to 13.85v and 5w according to the meter, I'll try to check it again if I can get direct sun at some point today.
  30. Rednecktek

    Have I set up my system correctly?

    Another check that doesn't risk going dark is to let the SCC stop charging, disconnect a battery and check the voltage. When it starts getting dark re-measure the voltage and make sure it hasn't self discharged while it was sitting there disconnected (a sign of a bad battery) and then repeat...
  31. Rednecktek

    3s2p

    Plus your 3s/2p will be able to harvest power in lower light conditions such as early morning and late afternoon because the controller has more to work with.
  32. Rednecktek

    Have I set up my system correctly?

    Yup, I missed that. You've already calculated for that. What do the batteries read voltage-wise when the SCC shuts off? You may have a bad battery as well, the easiest way to check that is to take a battery out of the loop for a night, math the run hours, swap batteries and repeat. If you...
  33. Rednecktek

    if a 48V battery can be lethal, how about a 40V panel?

    Well as an electrician on the big container ships built in Asia I've dealt with (and been lit up with) quite a few voltage ranges in my time and I can say: 9vDC : Tastes tingly 12vDC: Can burn if you hit it wrong 24vDC: I have welded with, don't lick it 120vAC: tickles 220vAC: stings 440vAC...
  34. Rednecktek

    Have I set up my system correctly?

    Are those batteries Lith or Lead? If they're any form of lead acid (FLA, AGM, GEL) then you're only going to get half the available power which cuts your battery bank down to 250Ah. Recalculate if needed but that might be an issue as well.
  35. Rednecktek

    Is my SCC dead or something else?

    Thank you guys, I learned a LOT with this, like how the voltage and amperage aren't linear and a better idea of how the MPPT system works. My brain hurts in a good way now. :)
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