solar charge controller float mode issue

Thread Starter

amitele

Joined Jul 30, 2016
21
Hi,
I have 12 volt /10 amps solar charge controller.
As per design it will bulk charge at 14.4, absorb charge is between 14.4 to 14.6 and after that it will enter into float mode.
when charge controller enters into float mode its voltage will step down to 13.7 volt and led will starts blinking.

I observed that, when i put power supply (to simulate solar panel) voltage above 14.6 volt, led is blinking which is normal but when i measured voltage across battery terminal using multi-meter then voltage is fluctuating between 14.7 to 13.7 and also between these range.
Is this normal or it require a fix.

NOTE: All this observation is while charging.
power supply and battery is connected to the charge controller.
Load is switched off.
I observed the same when i connect solar panel instead of power supply.

Can anyone guide me on this???
 

Dodgydave

Joined Jun 22, 2012
11,285
A 12v sla battery should be at 13.68v charging, the battery will set its own voltage when under charge, as long as the psu can give out the current.
 

wayneh

Joined Sep 9, 2010
17,496
It's common for a charger to pulse at a low duty cycle instead of actually holding 13.7V continuously. The voltage during the pulse is obviously higher than 13.7V, but it's brief and the controller can watch the voltage after that voltage is removed.
 
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