Hi, I'm connecting a new smart solar 150/50 to my batteries (12v 1800a/h lead acid). Does it matter which order the cables are connected? +ve or -ve first? Thnx for advice ;-)
asked
Wiring 150/50 to battery
I know when it comes to automotive, positive should be connected first because negative is grounded to the body.
If the negative is connected first, a spanner shorting against the body when connecting the positive could damage the battery, cause fire or injury.
But, in the case of a solar / battery setup, even bus bars, I can’t think of any practicalities that would prefer one over the other.
That means we need the electrickery gurus to advise whether there is any difference connecting one before the other.
It's best to always connect minus first, and have all switches / fuses / etc. in the positive lines.
this way you prevent that any communication wiring can have current flowing through it when a negative wire is not connected.
Thnx for tips...hadn't actually contemplated a fuse between the +ve battery cable and the charge controller. I've actually got a 50A fuse/holder spare: would that work for the battery/controller I've got?
