Battery charging from a generator. Voltages and Current Discussion.

[superheat6k]

Is the output voltage from the FP not adjustable - surely tweaking it down a bit would moderate the charge rate to something more sensible. I know on the AC versions the output voltage is a function of the speed (as obviously is the frequency). Have you tried adjusting the governor ?

 

[VicS]

Is the output voltage from the FP not adjustable - surely tweaking it down a bit would moderate the charge rate to something more sensible. I know on the AC versions the output voltage is a function of the speed (as obviously is the frequency). Have you tried adjusting the governor ?

Good point
The owner's manual describes the procedure but I see no indication of the voltage range .

 

[Mark Payne]

The governor has a low and high setting that apparently should not be adjusted but I will study the manual some more and maybe speak to the UK FP guys.

 

[jwfrary]

There's a small silver control box, inside it there's a potentiometer which adjusts the output voltage. However they are really fragile so be careful.

 

[Mark Payne]

The governor has a low and high setting that apparently should not be adjusted but I will study the manual some more and maybe speak to the UK FP guys.

Hi Jon
Yes ... thanks for that. I have spoken to Fischer Panda Uk and apparently there are two pots. They are accessible from the opposite sides of the VCS box. The one on the left is the voltage adjust and the one on the right is a current limit setting. Just what I need! Going to discharge the house banks to below 70% SOC and then see if I can set up a reasonable current limit by adjustment.

 

[jwfrary]

Go easy with them, they are quiet sensitive adjustments as I remember, been a while

 

[Mark Payne]

Just want to finish up here with the final outcome. I was able to locate the current limit adjustment on the silver VCS box. This is the adjustment pot on the right hand side of the VCS (side with one connector). Turning this anti clockwise by 1/4 turn brought the total charge current down to around 100A on the 3 battery bank at 75% SOC. This was originally more like 200A. Here is a video of how I did this.