Morningstar Star charge controlle not charging batteries

[Sol y mar]

I have a Morningstar ProStar MPPT charge controller Model PS-MPPT-25. It won't charge the batteries. It says it is charging but they are not coming up. Do I need to take the back flow resistors off the back of the solar panels. I have 2 kyocera 450 watt panels. Thanks for anything you suggest to resolve the issue.

[Logan5]

have you used a multi meter to measure the voltage of your batteries? When you initialized this set up, did you connect the batteries first, then your array?

[SunEagle]

I have a Morningstar ProStar MPPT charge controller Model PS-MPPT-25. It won't charge the batteries. It says it is charging but they are not coming up. Do I need to take the back flow resistors off the back of the solar panels. I have 2 kyocera 450 watt panels. Thanks for anything you suggest to resolve the issue.

Well my first question is, are those really 450 watt panels?

My second question is, what is the voltage of your batteries?

Depending on what you answer it is possible that you are overloading that 25amp MPPT CC.

[Mike90250]

... It says it is charging but they are not coming up. Do I need to take the back flow resistors off the back of the solar panels. ....

Wow, they are finally using the backflow resistors. Without those, the Flux Capacitor overloads, and we won't know when you will end up.

Can you tell us what the stickers on the back of the PV panels say - Vmp, Imp, Voc
What size is the battery bank volts & amps ?

[Sol y mar]

Thanks to all, I actually have two 150 watt panels (not 450). The resistors are built into the wire connectors and can't be removed. I have 4 - DST12, 12volt, 170 amp hour Guardian Safeguard Douglas batteries. Isolating each battery was 12.5 volts. Do I have too much battery for the ProStar charge controller? Solar input is 22 volts, charging output is 14.2 volts. I've disconnected battery &solar, done factory restart and battery was connected first. I'm stumped.

[Logan5]

Those are not resistors, they are diodes

[SunEagle]

Thanks to all, I actually have two 150 watt panels (not 450). The resistors are built into the wire connectors and can't be removed. I have 4 - DST12, 12volt, 170 amp hour Guardian Safeguard Douglas batteries. Isolating each battery was 12.5 volts. Do I have too much battery for the ProStar charge controller? Solar input is 22 volts, charging output is 14.2 volts. I've disconnected battery &solar, done factory restart and battery was connected first. I'm stumped.

How do you have those 4 12volt batteries wired together. If they are all wired in parallel then you have a 12v 680Ah system and 300 watts of panels will maybe generate 25 amps of charging which is is not nearly enough to keep those batteries happy.

If the solar panels are inputting 22 volts and the charger is putting 14.2 volts to the battery then it sounds like all is working. If your batteries aren't charging then you might have one or more bad batteries in the group.

Have you tried just using 2 of those batteries wired in parallel to the charge controller and then wired the 2 x 150 watt panels to see if anything changes.

[Sol y mar]

Yes, I think you are right about having too much battery capacity. And thanks for letting me know those are diodes! My 63 year old brain fails me sometimes. I was also leaving my inverter on at night to keep my phone booster going but think it is draining what little power I am generating. It just started doing this as the days have been shorter and we've had clouds lately. Thanks everyone for your help.