Hey guys I am pretty excited to share my first DIY powerwall build (well I was able to find only 83 good cells so not exactly a power wall). All the cells are above 1500mAh and in total I have roughly 540Wh of energy. It is low for many of you but for my small house it is fine as my house doesn't need more than 2kWh per day and the peak load is not more than 500w at once which is for short time also. I need some help with the design because I want to expand my pack in the future as I find more cells without disassembling my current pack. I'm charging the pack with 200watts of solar. It is the starting of my powerwall journey so any help, tips, and guidance are appreciated.
Edit - I am not using a BMS right now because it hasn't arrived yet. I have ordered Daly DL7s 50Amp bms. I am checking the voltages of each pack every 2 hours and the voltage difference after using it for one day is 0.08v. I will be using the pack with me monitoring until the bms arrives.
Edit - I am not using a BMS right now because it hasn't arrived yet. I have ordered Daly DL7s 50Amp bms. I am checking the voltages of each pack every 2 hours and the voltage difference after using it for one day is 0.08v. I will be using the pack with me monitoring until the bms arrives.