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Tinker

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Joined: 07/11/2007
Location: Australia
Posts: 1904

Posted: 03:51pm 09 Oct 2018

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Yes, I'm curious too why you had so much trouble with that charge controller.

In case you are interested, on page 20 of tinyt's thread you can see a pic of how my power in/out connections are made.
On top of the c/b's there are inputs from the Outback 60A controller and a reserve GSL 60A controller which is switched off normally. The third cable goes to the battery.

The bottom of the c/b's goes to the inverters, I have 2 running, powering different loads on separate Ac circuits.

Never had any problem with that, even when back charging from a grid tied 2KW inverter which I can plug into either inverter.

Klaus

renewableMark

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Joined: 09/12/2017
Location: Australia
Posts: 1678

Posted: 10:54pm 09 Oct 2018

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Well if you connected the charge controller to the inverter input is it possible when you drew a heavy load the charge controller tried to feed too much voltage to compensate for the drop and fried the inverter, now that you are feeding the battery it acts as a sponge.
Dunno just a guess.

Cheers Caveman Mark
Off grid eastern Melb

johnmc
Senior Member

Joined: 21/01/2011
Location: Australia
Posts: 282

Posted: 11:22am 10 Oct 2018

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Good day All,

Klaus, I looked at your battery switches, and it appears that your inverters are not directly connected to charge controllers, but through switches and also varying lengths of cable, this will introduce some impedance between the charge controller and the inverter, maybe also the battery is much closer to you switches than the inverter.

With my setup originally, I had the midnite controller feeding directly into the terminals of the inverter and the main 48v supply 60mm sq cable ran 4 meters from the battery to the inverter.

Mark, as you say, may be the battery as you say is sponging up unwanted inputs

Any rate all is well.

cheers to john

johnmc

Tinker

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Joined: 07/11/2007
Location: Australia
Posts: 1904

Posted: 01:23pm 10 Oct 2018

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johnmc said

With my setup originally, I had the midnite controller feeding directly into the terminals of the inverter and the main 48v supply 60mm sq cable ran 4 meters from the battery to the inverter.

Mark, as you say, may be the battery as you say is sponging up unwanted inputs

Any rate all is well.

cheers to john

4 meters is a looong run for a big load battery cable. None of the cables in the pic of my set up is more than one meter long.
I think ideally you feed power into your battery at one end and draw it out at the other. The charge controller cables need a good clean run to the battery, I think superimposing heavy inverter currents on top of the charge current may have been your problem.

Klaus

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