PINNED ZXD2400 Old + New 0-60V 0-50A Power Supply & Charger

[shirley_hkg]

No. You can't, because of resistance of wires.

[Burgerman]

Resistance of wires becomes less and less important as current falls away. At the point where the current is lowest when charged, a the end of CV stage then, it plays almost no importance at all.

It wont make any difference at CC as voltage is not yet reached.
It may mean a slightly LOWER voltage at the start of CV stage where the current is still high. But thats a good thing. But its barely measurable.
And the final voltage, at end of CV where current is low then voltage is the same as power supply (because low current) and thick wires. Ohms law!

You see that 0.01V extra at anything below 10V in my photos on the previous page? Thats MORE than the correction needed... Already!

So 4 wires really isnt needed. Even with relatively thin charge wires it still isnt. But if using say 12 swg silicone to cope with 50A then its really irrelivant! Unless 5 or 10 meters long.

[shirley_hkg]

I can go away with those settings, and it won't go over 3.4v

In 2-wires mode, you may get 5A only. You need to apply more than 5V to obtain a 50A current. Then you are required to watch it out not going over 3.6v on the battery terminals.

[Burgerman]

No. It will go to 3.4V CV and stay there!

If thats whats set. On 1 cell. At 50A.

I have not tested this but why not? Are you saying it wont let you set 3.4V or 3.6V and 50A?

[Burgerman]

This part baffles me.

In 2-wires mode, you may get 5A only. You need to apply more than 5V to obtain a 50A current.

See here:

Its set to 2.50V. And set to 12A. I could presumably set this to 50? Why not? If its just cable resistance your wires or connections are way too small! Andersons, 10 guage pvc for 40A or more. Or you will melt something.

So below it would charge at 12A and then reduce that as it reaches CV to about 0.01A or 0.00A when it reaches 2.50V. It will not exceed 2.50V at any time. 2 wires.

[ex-Gooserider]

Looking at the photo, to me that black area might be a bit of shadow from the big cap on the left... If it isn't, then I see a rather rough looking component above the fuses between the caps and another (or possibly just a pad) right next to them...

However I agree, replace the fuses (I'd put in holders to make them easier to replace next time) and see what happens after that...

ex-Gooserider