Now, tighten the screws of each bus bar on top of the battery modules. B- goes at the negative electrode of the first module, then B1+ to B4+ to the positive electrode of each module (B1 to B4). Position each wire at the corresponding battery module electrode. For the larger B- cable, you’ll need an AWG4 ring. Grab the micro connector string of the BMS and add a terminal ring to each wire. Wire The BMSĪ BMS is an essential component of a lithium battery bank - it monitors and protects the battery. You’llYou’ll carry out the same process for the wiring of the BMS. Then go on with the 4 other wires connecting to each battery module’s positive electrode, from B1+ to B4+. You’llYou’ll start with B-, which is connected to the first negative electrode of B1. Instead, position each wire electrode at the corresponding battery module terminal. Do not connect the wire string to the battery balancer yet. To do this, grab the micro connector string of wires and add a ring terminal to each wire. Now, add the battery balancer - it helps maintain each battery module at the same state of charge. The rated voltage of each module is 3.2V in total, you’ll get 12.8V. At this point, get some duct tape and wrap the 4 modules together as tight as possible. The battery modules come with bus bars and nuts position the bus bars to connect the four modules in a serry. The positive electrode of one module should be close to the negative electrode of the next one. Make them stand and organize them as pictured. Combine The 4 Battery Modulesįirst, assemble the 4 modules (B1, B2, B3, B4). This step involves building a 12V, 50Ah(650Wh) lithium battery bank ready to fit in your DIY solar battery box.įor this step, you’ll need the following:įirst, let’s have a look at the final result of a lithium battery pack with 4 modules: 4 LFP modules with BMS and balancer. Here is the 6-step process for your DIY solar battery box: Now that you’ve gathered your materials and tools, it’s time to set up your workspace and get cracking! Time to full charge with a 200W solar panel The specifications of our DIY solar battery box are as follows: Capacity Here are the tools you’ll need to build your solar battery box: Lithium battery prismatic cells – 4Pcs, 3.2V, 50Ah Here are the components you’ll need for your DIY build: Image Material Needed For A DIY Solar Battery Box These 4 modules will link up in series to create a 12.8V lithium battery. Our build uses prismatic LiFePO4 (LFP) modules, each with a rated voltage of 3.2V. Long life duration (4000 cycles, 10 years).Lithium batteries are reliable and durable they offer several advantages: It consists of several modules connected in parallel and/or series to reach the desired voltage and capacity. It provides clean and reliable electricity, similar to utility standards (110V, 60Hz).Ī lithium battery pack stores and supplies electrical energy. It converts DC electricity from the battery into AC electricity usable by our appliances. The inverter supplies power to the loads. We recommend the MPPT models they are the most efficient. It ensures that the battery receives the correct voltage (12V, 24V, or 48V) and follows the proper charging profile. The solar charge controller ensures safe and efficient charging of the battery with a solar panel. Here is a simplified electrical diagram for a solar battery box: This all-in-one solution combines three main components:
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