How to Limit Current to 2A from a 12V 70Ah Solar Battery Safely?

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#1 21671971 18 Jul 2014 07:51

Jed PP Jed PP

Anonymous

Post #1
21671971 18 Jul 2014 07:51

Hi Sir, Maam
I had a solar battery 12 V; 70 A
and I need to limit it to 12 V; 2 A

How to compute and how to limit it. Thanks....
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#2 21671972 18 Jul 2014 08:24

Rohit Dubla Rohit Dubla

Anonymous

Post #2
21671972 18 Jul 2014 08:24

Use a 2A slow-blow fuse (or a 2.5A fast-blow fuse) in series with the output. This is the simplest way.

A more complicated way is to "sense" the output current via a 0.1 ohms series resistor - 2A through it will develop a voltage of 200mV across it. Use this voltage to trigger a monoshot which in turn will turn off the load.
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#3 21671973 19 Jul 2014 19:00

Jed PP Jed PP

Anonymous

Post #3
21671973 19 Jul 2014 19:00

This is what I mean....
#4 21671974 20 Jul 2014 07:34

John Schmitz John Schmitz

Anonymous

Post #4
21671974 20 Jul 2014 07:34

Jed,
Please provide more information. Are you looking for circuit protection and if so are you worried about the battery, the wiring or the load? Why wont the fuse suggestion work for you? Would a circuit breaker work better? Are you looking to regulate the current output?

More information may get you a better answer to your question.
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How to Limit Current to 2A from a 12V 70Ah Solar Battery Safely?

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