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Forum Index : Solar : protection solar requlators

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herbnz

Senior Member

Joined: 18/02/2007
Location: New Zealand
Posts: 258

Posted: 10:03am 25 Nov 2016

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Hi All
Just like to sound out here if any one has come up with a way to protect regulators against the battery being disconnected while the solar is still connected.
I have found that although you can always tell people to disconnect the solar before working on the batteries, it still happens, either accidentally or they forget. Hell I have done it myself. I have to date always got away with it but manufactures give warning against it.
A simple protection is a relay supplied from the battery disconnecting the panels but may not be fast enough.
Also would like to get comments on the design of controllers that don�t have a common negative. In the past I have often commoned the negatives at the battery so the system can be earthed now days I cannot earth the panels and need to run full +ve -ve wires to the regulator.
Herb

solarwind

Regular Member

Joined: 03/02/2008
Location: South Africa
Posts: 51

Posted: 10:51am 25 Nov 2016

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Hi Herb,
You are right about the regulator exposed to over voltage as you disconnect the battery.
I'll upload something shortly that might help.

You don't have success until you've tried it!

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