diy solar

diy solar

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  • Bms or scc

    Basically I have wills 24V/2K setup. But I cant seem to get my pack up to full capacity. My single pv is 250W. MT50 shows 29-32V @5A+/- 1 charging during the peak day. 3 days now, and still not full here in southern nevada. Yesterday, CC battery led flashes green (full charge) but pack displayed...
  • Swapping my 24V/100Ah bank to 24V/200Ah bank.

    Just received my 8 new 200Ah cells, (Ninthcit cells-Amazon) which I plan to prep accordingly. Currently in place are OKS's 100Ah cells w/ the 8S 100A bms. Flawless thus far I might add for the last 6 months. I've cycled them consistently, daily, both gently, and occasionaly aggressively...
  • Temp sensor

    I'm considering the epever tracer 40A mppt CC bundled w the mt-50 and temp sensor. However, when my 24v100ah battery bank is in place, it will have it's own bms including temp monitoring. These seem to function the same yes? CC reads temp from Battery, and reacts accordingly. Bms reads temp from...
  • Giandel 2k/4k 24V psw inverter

    What exactly would cause a "HI" (OVP) on this unit, when it's rated up to 32V. I'm experiencing this recently. My OKS bms reports 29V, my CC mt-50 reports similar, and even directly metered with my fluke right on the batt and inverter terminals, I'm getting 29.0-29.1V.. So, is there a setting on...
  • Quasai capacity test

    OverkillSolar 8S 24V100AH pack OverkillSolar BMS Giandel 2000/4000W inverter So, I havent really put this pack to the test yet, but today, after charging it to 97.88% capacity as reported by the bms, I, at sundown, with PV panel disconnected, hooked up a simple halogen lamp to a kill-a-watt P3...
  • General wire guage question.

    I have a backyard ground mounted 250W panel with a 12 guage mc4 out. The run into my garage to my charge controller is about 40 feet. Is a 10 guage extension cable recommended? Or is it overkill, and would a 12 guage to 12 guage extension suffice? Thanks Tyler
  • Santan 250W panels in Vegas NV

    I made the trip from Vegas to AZ and back and picked up a palate of 20. Right now, I'm only needing 8, but I figured I'd maximize my effort and load up 20. (900#'s worth was the sweet spot for my Ram 1500) I've had 4 installed on my backyard ground mount rack, and they perform beautifully. Not...
  • Inverter for L2 EV Charging

    I'm considering getting a dedicated 4000 or 6000W 240V inverter strictly for L2 charging of my 2015 Leaf. Any reason I can't opt for a modified sinewave unit instead of full blown PSW? The cost difference is big, and it will be strictly for charging batteries. Is it critical?
  • Tap into the load port from CC? Or not?

    I'm adding a 12v led light string to my back patio from my 24V setup in the garage. About 50ft of weatherproof led strings along the underside of the patio. My question is, can I simply tap into the load port on my epever tracer 40A and just leave the load turned on all the time? My potential...
  • On/off remote switch cord for giandel.

    Just making sure, I read a note on an Amazon review that the cord is NOT a standard phone cord wire. Mine came w/ a 15 foot cord, but I really need a 25' for my application. It LOOKS like a regular phone cord, and the manual only refers to the cord as a "remote cord" not rj11 or rj45. And again...
  • Why is this?

    I'm bringing this diagram over from another thread in the safety check forum. Both Ampere's have since arrived. Both were top balanced individually, as was the DIY cell pack, then everything was connected up. The Positive & Neg cables from the Ampere's and the Pos cable from the DIY pack are all...
  • Clarification on epever tracer 4215BN

    From the manual, "max pv array power" for my 24v system shows 3120W. But another section shows "max pv input power" is 1040W. So I'm wondering what's the difference? I'm about to do a 2S-2P with my 250W panels (voc=37.6 isc=8.85 each) so that equates to 75.2V@17.7A= 1336W going to my CC. That is...
  • Heltec 8S

    I just received this one today. Forgive me, but I can't seem to find it, but there was a post awhile back about "pre-charging" this unit before attaching it. I'm confident with attaching it to the posts..It piggy backs right on the same posts as the bms, but is there a proper procedure? I'm...
  • WindyNation 10guage extensions

    I just recieved my set of 40' 10awg mc4 extensions. I'm no wire expert, but a quick visual side by side with my existing 12 guage coming out of my panel shows a noticable difference in actual size/diameter? Is this normal? Are the short lengths coming out of panels typically beefed up more with...
  • Added a 2nd Inverter. Plz check my work!

    It's the identical Inverter, the original has been in service for 1.5 years and I'm very happy. I'm just wondering if there is something I've overlooked in this setup. Reason for 2nd inverter? Backup in case of failure and to better balance out my household loads. Like, I can start a load of...
  • Connection solution?

    I'm adding some led lights strips around my back patio. My 24to12V converter out wires are 10guage, and the leds, as shown, are 22guage. I've exhausted my search for some kind of connectors, clips, harness, distribution point or other solution to utilize for this. Plenty of connectors in the...
  • Swapping out a 24V bank with a 12V bank temporarily, the safest way

    I just received 4 of 8 200Ah cells. The other 4 are about a week away still. What I want to do is work on these 4 now. I'd like to attach them into my current system, and get them fully charged or close to it. (My benchtop ps is taking forever), so what I propose is to disconnect my current 24V...
  • ANL fuse install order.. this doesnt look right?

    Windy Nation fuse holder/kit shows this little diagram on the side of the box. Putting a flat washer between lug and fuse? I though this was a no no. Washers are poor conductors right? I get the top washer placement, but shouldn't the lug and fuse be pancaked together?
  • Question for mods

    This is more a forums rules and regs question.. Is it allowed to post a link to a YouTube video of me showing my setup and asking a specific questions regarding said setup? I figure a quick 1 minute video depicting the actual setup, components, cabling, etc.. could be easier than uploading a...
  • Double stacking bus bars question

    I've read posts regarding folks double stacking bus bars.. presumably those bars that aren't quite as thick and robust. I've recently received bars with my 200Ah cells that I would consider to be in that category. I can nearly bend them with thumb and forefinger. (See pic, with a penny for...
  • 2 questions

    So I basically have Wills identical 24V 2000W setup. Mounted on a wood panel on the wall of my garage. The grounding screw on both the inverter and the CC are not currently being used. Am I ok to run a 12 or 10 guage wire individually from both, directly to my neg distribution block? At this...
  • I cant figure this out

    Epever tracer 4215BN going to overkills 8S 100A BMS 24V bank. I can't figure why, when I'm at a 75% soc for example, the "batt" and "pv" leds on the cc are both flashing green at the slow rate? PV flashing indicates charging, and "batt" flashing according to the manual says battery is full. Bms...
  • Load terminals

    Just curious about the load terminals on my TracerBN 40A w/my 24V lifepo4 setup. Newly setup (offgrid) system in my garage. Seems like this is a quick & easier access to a low to moderate draw accessory for lighting or the like? Theres a whole timing schedule that can be programmed on the MT-50...
  • Settings for b-grade cells. Having some challenges.

    I have an 8S 200Ah DIY pack, and its become clear that I have 2 problem cells. 1 in particular reaches 3.65V while the others are still just a tad over 3.4V. Obviously the BMS charging switch turns off. Once the 1 cell, and the rest of the pack settles down, the charging switch turns back on...
  • Possibly a goofy question

    I've been wondering this for awhile, but hesitant to ask for fear of ridicule? but here goes. Can I disconnect my pv panel from my SCC and attach a bench power supply to it, set it appropriately (in my case in peak sun here in December in Nevada I get 28-32V @ 4-6A from my one 250W panel)...
  • Fuse size thoughts

    Project: milk crate build for camping. 12V/4x200Ah cells w OKS 4S 120A bms 1200/2400W psw inverter (giandel) 4guage wires throughout. Except bms of course. I'm considering an ANL fuse kit @150A? I don't forsee ever drawing over 1200W while boondocking. Would this suffice? Thx!
  • Lynx LFP's on amazon

    I've seen a few remarks about Lynx batteries here, (months ago) but not any definitive feedback. Anyone well along with these, care to share their thoughts? Thanks
  • Charge Controller to Battery fuse

    My old setup was a 40A scc to 24V200Ah bank with one of those t-tocas 50A circuit breakers in between. Recently now I've replaced the 40A scc with a 100A unit feeding a 24V400Ah bank, and I'll need a 120A breaker inbetween? Which has got me thinking, breakers protect wires and the equipment, but...
  • Is Balance ok for now?

    I just recieved from Overkill solar, 8x3.2v 100ah lifepo4 cells. It might be a week or so before I get all of my 24V setup components in place. Of the 8 cells I recieved, they meter as such: 5@3.295 and 3@3.294. (Not too bad, yes?) I may be a stickler, but since I have the time, is there any...
  • Adding more capacity

    As depicted in my diagram. I wish to add additional capacity into my current DIY system. (Pretty much Wills 24V setup) I've not yet decided on a 200Ah or 280Ah bank just yet. Funds will decide, however 2 questions: 1. Recommended BMS for either the 200Ah or 280Ah bank? 2. Once I get my selected...
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