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- Sep 4, 2020
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Good point!Okay so that is a regular toggle with 4 separate junctions inside making 4 complete but separate circuits with one switch? Or am I reading that wrong?
What you are saying is to use three one for 12V one for 24V and 48V with each voltage wired with the same modules in different combinations for each switch? Sounds like a plate of spaghetti ! Are both positive and negative going through each switch? Leaving each one an open circuit until the switch is closed?
Yes you will will need to switch voth the positive and negative side of the cells. The simplified wiring would look like this for 2 sets of cell to switch from serial to parallel.
But if you have 4 sets of cells you will need 8 poles. 8 pole single throw (8pst) are hard to come by. You could use a pair of 4pst for each option. That is one approach if you care to fo that route.
The next option that comes to mind is a selector switch.
They USED TO BE stackable so you could add as many poles as you want. I couldn't quickly find stackable versions. DigiKey would be a good place to look. That would let use a single selector switch to select which configuration tou want. Drawback is those contacts are not rated for high current.
High current versions may not be in production anymore because there are cheaper ways to do it now using semiconductors or relays. The selector could control contractors....
That can handle the current but they require a voltage source to actuate them and more cost in the contactor and the voltage to activate them.
There are rail-mount relay contacts ...
https://www.digikey.com/en/products/detail/finder-relays-inc/20-21-9-024-0000/10055777
While they are sweet and wire up easily and neatly they would set you back $500 or more and still need a control voltage.
So the double switch for each selection may run about $50. There is another cheap option.
Battery terminals...
Combined with alligator clips you can configure any circuit you want.
Ben