![]() I checked each module in the beginning and all the modules are fine. So that spread over 20 modules is very low. The amps between each stack is only about 3-4 amps. As it stands now each stack is exactly the same voltage to 0.01 volts. If there is a change I’ll then check each module within the stack. If a module differs in any way I’d see it in the overall voltage of each stack. So far it’s humming along nicely all in balance! So all I have to do is keep an eye on each stacks voltage. There’s no need to buy an expensive BMS when using these batteries in this configuration. Each stack is within 0.01 volts of each other. My system finished and each stack connected in series. My system connected in parallel for balancing. These modules love being connected in parallel! So when I was ready to connect my whole system together, I connected each stack in series to give me 56v for my 48v system. I was thinking about a BMS but a few people on YouTube said there’s no need. The modules all balanced up just by being connected in parallel. So every leaf module was connected in parallel and I had that connected for a couple of weeks while I was building the rest of my solar system. So when I first built the battery I connected all the stacks in parallel. So I have 7 stacks in series which makes 56v. But for me it’s about preserving my batteries! Spending more money buying more batteries is investing in the lifespan of my batteries. If I was to run the battery From 100%~0% it’s about 4-5 days of power. If I was just supplying normal levels of power for a family with one child I can run my batteries about 57%~43% now. I run mining machines so I use a bit of energy. My goal is to have a charge/discharge from 55%~45%. If you can stay as close to 50% as possible while using the power, it’ll last forever! I’m getting really close to having 20kw of power from 60% charged down to 40%. So cycling a battery really wares it out. The most damage to batteries is done in the charging and discharging. This dramatically extends the life of the battery. I’m adding another 18kw at the moment so hopefully this will bring it even tighter to 60%~40% useage range. I also have built a large battery out of these cells, so I only charge and discharge in the range of 70%~30%. So I buy them based on how much mileage was done on them. Better still if you can stay in the 60%~40% range they’ll last even longer! But if you can use your batteries in the range of 70%~30% for charge and discharge they’ll last longer. That’s why they only have a certain amount of cycles for lifespan. The high and low ranges are hard on batteries. But if you have lots of money to burn then go ahead and start with old batteries and 12v hardware.Īlso I’d recommend going as big as you can with battery storage. ![]() Once I found out that converting from DC to AC the higher the DC voltage is the better it is Because there’s less work involved. ![]() Why waste money on 12v inverters and charge controllers and cables if you plan on going up to 48v anyway? Just learn straight from 48v. It’s higher voltage yes, but connecting everything is pretty much the same if I’m not mistaken. Also there’s really no difference between 12,24, or 48 volts apart from hardware.
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