Question ....maybe idiotic?

[garyr]

Hello again from Ohio.
A thought keeps rattling around in my skull. Not much else up there!
I have a system in a freightliner van:
500w solar array ... Epever 40w charge controller ...
16 3.2v 50ah cells tied together=13.2v 200ah Lifepo4 battery.
I am using the charge controller to charge the battery through the battery
poles on the cc. The load lugs are unused.
Thought:
On cloudy days the voltage runs low or in some cases shuts down the system.
What if I attach the load lugs of the cc to the battery and kind of double charge the system
on cloudy days.
I am a mechanic and not an electrician so belittling me on this occasion is fine if warranted.
It seems a valid question though.
I once saw a bulldozer in sub zero weather with 4 vehicles jumping him to get him going. Took an hour still.
Thanks in advance
gary

 

[Supervstech]

Bad idea.
First, it won’t get more wattage than the panels charge at already.
Second, it could create a short to kill the battery, or the controller, or both.

 

[Supervstech]

The bulldozer got charged with 4 charging systems attached.
If you connect 4 additional solar panels and charge controllers, you could get additional energy… but trying to pull energy from the battery to charge the battery is akin to perpetual energy, and is a losing attempt.