12 Volt, 35 Amp Hour Sealed Lead Acid Battery

[PNjunction]

I have a 12v fan plugged into the cigarette lighter on the charge controller
Why am I getting this on my meter is stating 14 to 19 volt's of electricity?
But charge controller in showing 11.3V

I'm assuming you are referring to the HF charge controller, although it is a bit unclear as to exactly where you are placing the probes from your meter. Most likely this is the panel voltage output leading to the controller (14-19v), or you are only seeing the voltage with the batteries disconnected. With the batteries connected, the display should be the battery voltage itself (your 11.3v)

The big question is have your 35ah thunderbolt agm batteries ever received a decent charge? The very first thing I'd do is charge each one individually to make sure. Remove the extra battery from the circuit leaving only one connected. Make sure that at some point, your voltage reads 12.9v or higher and let it be like that for many hours. Remove that fully charged one, and replace it with the other and repeat the charging process - with NO loads like a fan attached. All you are doing here is making sure that you can get a decent charge on an individual battery. It might take days, so be prepared. Doing it individually even if you plan to parallel them later can help point out a dud that won't take a charge, but will be a drag on the other one when they are eventually attached together.

You can move forward from there, but 11.3 volts is a very discharged battery, OR the load on it is so big, that it drags the voltage down badly - basically and undersized system right from the get-go.

[crocker5731]

From the battery clips from the charge controller to the Battery.
The charge controller is showing 11.8 and the meter is showing 11.73
the barriers are brand-new

[crocker5731]

what battery would you recommend from Walmart?

[PNjunction]

I would recommend using just ONE of the two batteries you already have, use all of your panels, and not go to Walmart just yet.

One of the most common mistakes made with the HF kits is marrying that panel to a huge capacity battery (in your case 70ah combined with 2 of them), and not having enough solar insolation in the day to charge it back up properly.

The voltage values on the controller DISPLAY should roughly match what you read at the battery terminals. But what type of voltmeter are you using, and it is at all accurate? I wouldn't obsess over that too much now unless you are using a shirt-pocket voltmeter.

The very first objective should be "Can I get the display to read 14.5 to 14.7 volts" during good sun (it might take days to do so) without any load going on at the same time? - batteries connected of course. That would indicated that your batteries have finally reached a full charge. They NEED to see this voltage level eventually if you want to keep those agm's in good health. You might want to consider a battery charger for days of no sunlight to keep those batteries healthy (if they aren't gone already).

If the best you can do is only 11.3 to 11.8 volts or so, then your batteries are in a world of hurt. They need to get much higher. Either your solar setup will do it, or perhaps you can do some of your own testing with a battery charger to see if you are wasting your time on zombies.

[crocker5731]

Is Evaporative Air Cooler what I need or a portable air conditioner?