The power/solar/batteries/generator thread

[7.62x39(4)life]

48 volt system. The advantage to 48 over 24 is lower current, smaller gauge wire $, single series string of batteries.

1180 AH battery bank, 24-2volt cells. A nominal 50V's x 1180 = 59, 000 watts capacity. We use about 8 KW's a day. Battery bank gives us 3 day storage discharging down to 50%. Very rare to go 3 days w/o sun or wind.

This is always the best way to build a battery bank for sure, as differences in battery internal resistance can cause havoc in larger Parallel Strings of batteries.

48 volts is a good battery bank voltage for wind turbine systems, with long cable runs out to the tower.

In larger electrical substations they use a 125-130Vdc battery system consisting of a large string of batteries that is center grounded for so if you touch a wire it is only + or - 65 VDC with respect to ground.


I have a high voltage dc grid tied solar system all planned out, when I have the money...

[martinjony]

Well,The size of the battery bank required will depend on the storage capacity required, the maximum flow rate at maximum load and the minimum temperature at which the batteries will be used. The storage capacity of a battery, the amount of electrical energy, it can contain, is usually expressed in amperes hours.Series wiring refers to connecting batteries to increase volts but not amperes.