Recent content by vangogh

Gotcha. Good stuff. Thank you sir! I do need a/c for my own comfort while in the vehicle, but the issue raised was having the vehicle auto start to run the a/c when away from the vehicle, hence the counter-argument. I just worry about 170F+ temps with lithium sitting there baking, and I would...

I honestly don't mean to harm the environment with that setup, and I may do some solar, but it's just not practical to power a/c loads with it considering the limited roof space and high cost of deployable panel systems (maintenance too, cleaning, etc). Every house and business that has a/c is...

Okay, balance leads were definitely the answer. Charging now holds at 30A for much longer, and IR measures a tiny 0.4mOhm. Manufacturer said expect 0.5-0.6, so I'm happy with the sample cells. Next I plan a full 3.65V charge to 2.5V discharge to measure AH (at 0.1C 20celsius). I'm hoping to see...

Okay, I got some data, and learned some things. With a slow ~0.05C discharge rate, I got 192.5Ah at a somewhat cold 10-17C. I had hoped for more since the discharge rate was so low, but I didn't go up to 3.65V and down to 2.5V, I only did 3.6 to 3.01, so that's probably part of it. I also...

Believe me, I've been down this road. It's one area I do know about. Efficiency is the name of the game in off-grid a/c. I've studied every possible solution and the only one that makes sense for my requirements is a 240V 42 SEER Carrier mini-split (most efficient a/c in the world, even...

Vendor can be deduced via a bit of sleuthing, but at the moment I'm not writing it out publicly (can do in a message though) because the vendor has been very generous, including sending via air freight two 100AH sample cells at their cost, and has agreed to completely rework their BMS to suit my...

I'm going to move my response over to that first thread since it's more on-topic. Thank you again John! You're a wealth of information and generous to offer your time on here. Cheers.

I'm definitely just doing cap testing right now, and these cells are indeed only for stress testing. I do understand that for the final battery banks the actual usage range should be lower. I plan to charge to 95% SOC and discharge to 15% since I only have a 5 year usage horizon, so I don't mind...

Indeed, I'm nowhere near the output limit, just mentioning where the setting is at because it could technically be set much lower and could cause the issue. But good news! I figured it out. I was already at the constant voltage stage of charging, so of course the current was less than 30A. I...

Thanks John. I always appreciate that you take a minute to offer guidance. I'm okay with running the device at max (with fans on it as I currently have) if it'll last hopefully even just a few weeks while I do some testing. It's owner's manual, and I confirmed in the settings shows an input...

UPDATE: Solved. The cells had already reached the constant voltage phase of charging, so the current was dropping as it should. Anyone have experience with an iCharger X6 and a Meanwell 24V 750W power supply? Mine seems to work fine but I can't get it to go past 26A when charging just a 2p set...

Hi Folks, I went to ebay and bought a used MEAN WELL SP-750-24 SERVO STEPPER MOTOR Switching Power Supply DC 24V 31.3A 750W to go along with my iCharger X6. I plugged the PSU in, and no LED, no voltage output. Started an ebay return, seller just refunded no return required, but I still wanted...

Very good info, thank you and all the other respondents. I am definitely skeptical of anything anyone says who is selling any product, so I'm with you on the raised eyebrow. After many exchanged emails, and discussions, my sense is that he's legitimate (whatever that's worth). Carl also can't...

kdog: thank you. This is perfect for inexpensive high C rate discharge tests, which I'll probably do towards the end of my stress testing if the cells have held up. The nichrome DIY resistor in a bucket of water sounds like a quick way to reach 1C 2C 5C discharge rates etc no problem, which...

Hi Everyone, First post here. I know many of you are miles ahead of me, so I'm posting this humbly and hoping for some (kind) input. I have an old EET degree that I never really put to use, and I've forgotten more than I've learned. But I'm catching up quick lately on account of wanting to put...