There are several ways to wire multiple batteries to achieve the correct battery voltage or capacity for a particular DC installation. Wiring multiple batteries together as one big bank, rather than having individual banks makes them more efficiente and ensures maximum service life. The batteries can be connected in series, in parallel and/or series/parallel, depending of the needs. Wiring batteries together in series will increase the voltage while keeping the amp hour capacity the same. An example will be to connect in series two batteries of 12v each with a 150Ah, giving as a result a 24v system but with the same 150Ah capacity. Wiring the batteries together in parallel has the effect of doublight the capacity, while keeping the same voltage. An example will be to connect in parallel two batteries of 12v each with a 150Ah, giving as a result a 12v system but with a 300Ah capacity. Wiring batteries together in series/parallel will combinate the above systems, achieving both higher voltage and higher capacity.