Charger and Solar controller not meshing well?

You should have the controller's pos and neg to the battery independent of the WFCO charger's pos and neg to the battery. (WFCO neg might include some frame which is ok)

You have a wiring issue.

Seems like GP is going to float. Very odd for a solar controller to absorb 2 amps unless it has a secondary charge circuit that is connected.

Or just leave the WFCO off.

Do not use the controller's load terminals. Use the Batt terminals only for output.

BFL13 wrote:
You should have the controller's pos and neg to the battery independent of the WFCO charger's pos and neg to the battery. (WFCO neg might include some frame which is ok)

You have a wiring issue.

Correct. The solar thinks the battery is charged.
BFL13 is also correct with his second answer.

The solar was performing a 14.7v charge. The WFCO was in 13.5v mode. When I closed the disconnect switch, shouldnt the charger supply a very small float charge, as the solar continues its 14.7v charge?

Would expect the solar charge amps to reduce some. Didnt expect the solar to run backwards.

My controller is small and cheap. It only has 4 terminals. 2 for the panel and 2 for the battery.

I'm wondering if the WFCO sends out a high amp charge when I first flip the switch. I should place the meter on the wire before flipping the switch. Then check max amps. Pretty sure my meter will display max.

BFL13 wrote:
You should have the controller's pos and neg to the battery independent of the WFCO charger's pos and neg to the battery. (WFCO neg might include some frame which is ok)

I'm curious, why would that make a difference?
Is it because of voltage loss between WFCO and battery?

The battery accepts most of the amps from the higher voltage charger.

EDIT--as mentioned by Boon Docker--the voltages as seen by the battery at its end of the wires

The solar at 14.7 will supply all the amps once the battery's voltage is higher than the WFCO's output voltage.

If the batteries are near full, then their voltage will be above WFCO's 14.4 (if it does 14.4) because of the solar's voltage, so turning on the WFCO will not show anywhere for amps or battery voltage.

When the controller gets the batts to 14.7, it will do whatever its profile says to do, such as hold it there for two hours and drop to 13.6.

I have seen on my Trimetric monitor that it can show neg amps flow when you turn off a charger keeping the batts at 14.8 and now they will go to 13.6. for the brief time it takes the voltage to fall, it shows as neg amps. Not real, perhaps a monitor thing?

so if your case is like that, if the batts are full and the solar was on the point of dropping to float and then the WFCO coming on triggered that somehow? Really stretching here!

You need to run the batts down a ways and then use both WFCO and solar to observe what happens for real. Not when the batts are full.

Double post deleted

Boon Docker wrote:

BFL13 wrote:
You should have the controller's pos and neg to the battery independent of the WFCO charger's pos and neg to the battery. (WFCO neg might include some frame which is ok)

I'm curious, why would that make a difference?
Is it because of voltage loss between WFCO and battery?

I was not very clear. The two need to be in parallel to the battery, which could allow them to share their output wires. what is not allowed is for one's output wires or even one wire to go to the input of the other.