Redarc BCDC2420 problems

Not only are Redarc products good design and quality but they have great technical service.
Why not give them a call on (08) 8322 4848 and talk with an engineer about your problem.

Your lucky the 1240 isn't playing up, I have seen a few posts on other forums
complaining of the 40A unit over charging batteries and requiring replacement
of the unit to correct the issue.

Duck...... your not running a 24v solar set up with a separate solar regulator are you?

Duck,
I have the exact same unit charging 2 x 110ah AGM batteries.
After it was installed I had endless trouble. The unit not charging, the batteries going flat etc.

My comments;
1) when the unit was installed it was done poorly. I had huge amounts of trouble. I took it back to the supplyer / installer 3 times but they could not fix it.
They too replaced the unit, assuming the unit was faulty.

2) I contacted Redarc directly & the local rep (Stuart Peddle) came & inspected my installation.

3) Stuart found several things incorrect with regard to the installation. The 2 major things were (a) the majority of connections were loose, (b) the unit had a very poor earth.

After all connections were cleaned tightened or replaced, and the earth connection was sorted, the unit has worked faultlessly.

Conclusion;
Check EVERY connection. All wires, fuses, everything. Make sure they are all tightl, clean & free of corrossion.
Check the Earth connection. I suggest that you remove the paint back to bare metal at the Earth point & then recoat with something after installing the Earth strap.

I did all of the above & have had absolutely no trouble since.
Others have also noted that the Redarc is very sensitive to poor installation....

Hope this helps

Cheers, Bryan