Describing such an arrangement can quickly become confusing in sentence form. In this case, we can double the amperage by replacing the individual four cells in series with four sets of two cells in parallel and then wire those four parallel sets in series. But what if we want a 12-volt battery AND more amp hours? We can increase the amp hour by adding cells in parallel to the existing arrangement. Returning to our 12-volt example: we can connect four 3.2V 180Ah cells in series to create a 12.8V 180Ah battery. Since a parallel connection will compound the amperage of a battery and a series connection will compound the voltage of a battery, we can arrange cells in combinations of series and parallel to achieve our desired voltage and amperage. Combining Series and Parallel Connections In this case, whenever we refer to a 12, 24, or 48-volt LiFePO 4 system, that technically means 12.8, 25.6, or 51.2 volts respectively. We can check that tolerance to make sure our batteries are within an acceptable range. Most devices will have a listed tolerance for over-voltage. 8V in this case is completely acceptable. We don’t want to deviate too much, but the. What matters here is that we achieve a voltage above what is needed to power the whole system. Taking this one step further, what if we want a 12-volt system, as found in most RVs? We will want to connect four 3.2V cells to make a 12.8V battery as shown above. The mechanism determining the potential voltage or amperage of a cell array comes down to how the cells are connected: in series or parallel. We can rearrange the same cells to produce a wide range of amps and volts. But for larger applications, that battery box tends to contain a collection of battery cells arranged to achieve a desired voltage and amperage. ![]() For small applications like cellphones, tablets, or clocks, one battery cell can do the trick. When we talk about batteries, we generally speak in terms of a single, holistic power source. But there are a lot of different ways we can arrange these cells. To this end, we bought sixteen 3.2V 180Ah LiFePO 4 battery cells. To get the most bang for our buck (or, more accurately, watts for our buck) we are building our own lithium battery. ![]() Rather than relying on propane, diesel, or other fuels, we are going all-electric with a solar power roof and a large battery bank. ![]() Our truck camper may be half a century old, but we are installing a completely new electrical system.
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