beserker786

Hi, all sold at the moment. Message me for how many you’re looking for and where you based and I’ll see if I can source them

Hi Guys. Sorry for such a late post. I came across 18650 packs, a lot of them. Selling them at R15 per pack of 100 packs. Or cheaper for more. For less would have to discuss but at R20 per pack. You can come see and pick up. They’re mostly dell/Lenovo/hp etc. Untested sealed still. Hit me up with a message if interested.

Hi

So I 3d printed cell holders for the Batterries, soldered on the fuses, hooked them together 7p, got a 24V cell meter balancer. And connected the terminals to the battery connection on the inverter. I’d say tested the cells and built the battery from scratch.

They’re still as laptop batteries. Sell them per laptop battery . The amount of cells depend on which battery it is

Hi Stok. On average , when I tested, I had usually all were good, or 4 were good, or all were bad per pack. Depends on the pack. The average Mah can vary, but I managed to make about 3x 24V packs with about 280 cells, all above 2000mah, some closer to 3000mah. I’d say a definite good yield of about 50% cells made it to my power wall.

Hi guys I came across more second hand laptop Batterries if anyone is interested. I can give them to you for R10-R15 a laptop battery, depending on how many you take. I’m based in midrand. They’re perfect for DIY powerwall and small projects! there is too many for me to add to my power wall.

Cool. PM sent

I’ve come across some used laptop Batterries for sale. Untested. Let me if you’re interested. Based in Gauteng.

Hi Guys Im not sure if its here to ask, but im planning to buy some panels, maybe a hybrid inverter which would be most of the costs for my system during this black Friday specials. But the one things that I would still require, is someone to do the installation for me. Can anyone refer me perhaps to someone who does this and that's reasonably priced? Ill need the system to get a CoC after the installation as well. Id really appreciate your feedback. Regards

Thanks for the info! Will do some reading up on the 3s layout to better understand. Ive managed to get this setup today,

Hi Guys, I'm planning with the sizing of my Li ion battery packs, and need to know how to limit the voltage of the cells to about 4.0V per cell, instead of 4.2V and also perhaps the discharged limit to about 3.1V - 3.0V. I plan on building a 4S 40P Li ion cell pack, to give around 1kwh pack, and part of the issue, is to control the upper and lower limits. Your recommendations would be highly appreciated. Regards

Ah I’m in sunninghill jhb! Hmm, yeah! Thanks for the great gesture! I may take you up on it in the future, let me do some ground work as well! Thanks

was contemplating getting a 3d printer for the printers, also to have the flexibility of customizing the holders like to allow for recessed bus bars and fuses, voltmeters, etc. I decided to think about it later and see how far I get for now. Ill take some pictures and start a thread to capture my progress in another section of the forum. Thanks for the welcome and input.

Thanks! Will do. I’ve got inspiration from them, watched most of their videos. I’m leaving my options open for building packs, still contemplating either 12,24 or 48V packs. Holders, I got an order for the 4x5 holders on their way, so will test those, I also like the home made holders with pvc pipe from average joe on YouTube, may try that as well. I’m also contemplating what to use for individual fuses. I got a few 1amp thermal fuses, but want to try spot welding them first to the cells, don’t want to do soldering, unless I can’t do the spot welding.i plan to limit the cells to 4.1v full and 3v empty, with planned 0.5 amp limit draw from each. This should help with cell longevity. ill think about bms and inverters etc at another time for now.

Hi Guys! I believe this is the only power forum where I can get and find related information. Been reading a bit, so I'm sure there are lots of people in the know here! I'm a mechanical engineer by profession, and have a started a side hobby with batteries and power packs. I've come across a whole lot of batteries, initially from my IT dept., and then from a recycler, id say about 2000 Li ion cells. now, I've got an OPUS tester and a multibay charger, and managed to get through about 100+ cells in the last month. so long road yet ahead. still planning, battery pack design and build, and then moving on to energy supply , transformers, charge controllers, switches and shunts etc. Would love advise and opinions and look forward to adding to the forum.