Charge controller showing batteries full, but battery charger is showing very low charge.

I have 7, 100 watt panels, a victron 250/70 charge controller, and 4 200 amp hour batteries and an inverter. I recently installed the charge controller and it’s showing my batteries as fully charged, but when I put a battery charger on them it’s only showing them as 10.4. If I try and run a load off the inverter it immediately shuts off so I’m assuming the battery charger has the more accurate voltage. The photos are what my app is reading from the charge controller

My question is where do I start trouble shooting and If I check the individual batteries do I have to unhook them all from each other?

Voltmeter on the batteries then on the mppt, then on everything between.

Sounds like a blown fuse that's connecting the mppt as it can't pass its voltage to the batteries

Melnyk20 said:

question is where do I start trouble shooting

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Disconnect the batteries from each other and the chargers. Test the voltage with a meter , and test each independently for charging and delivery of power.
The minimum voltage of 6 volts suggests a faulty battery, if lead batteries, or BMS shutdown if lithium battery.
What batteries do you have?
The reading of 13.61 volts may be the voltage generated by the charger, not the battery.

How are the batteries connected in the system, any fuse or breaker in series?
Picture and/or diagram would help the discussion.

For working with solar, a must have is a multimeter to directly measure voltage from your batteries and pv.

Working with this stuff without one is like driving blind.

I would not do anything before acquiring one.

What inverter and battery charger are being used?

What type of batteries? Most lifepo4 would not arrive new at less than 13v. You can test them individually without unhooking them by taking readings directly from the terminals.

Kind of hard to see the setup but the batteries are the AGM ones from renogy and my inverter is a 5,000 watt Jupiter one from harbor freight

This all looks like you have an open connection between the charge controller and the batteries. Looking at the history data from the charge controller, it only ever produced 7 wats, and each night the voltage drops to 6 volts. That's an open circuit for sure.

Bad connection, blown fuse, bad breaker or disconnect switch. When there is sun on the solar panels, measure the voltage at the charge controller output. I bet it will be right at your bulk charge voltage. The measure at the battery, that will be low. Now check every point in between. Measure for voltage drop across each connection and component like a breaker or fuse. Ideally, a wire, terminal, fuse, etc. should each have less than a fraction of a volt (maybe 20 millivolts max) across them. Somewhere, you are losing 3 full volts. Since it showed up to 7 watts, at some point it did manage to get to about 0.5 amps of current. I am guessing a loose or corroded connection somewhere between the batteries and the charge controller.