I have a Magnum Energy PT-100 solar charge controller. My system is 12 V with 7200WH of Lithium batteries.

Spec's are

MAX PV INPUT 200VDC + battery voltage

PV operating Voltage (Vbat + 8V) to 187 VDC

MAX input current 100 ADC

Nominal Bat Voltage 12, 24, 48

Battery Charger output range 1 to 66 volts

Continuous Charger output Current 100 ADC

Max output power 6600 watts

Peak (and full power) efficiency >99% (98 typical)

Tare loss (nighttime power consumption) <4watts (fan off, dis[play/led off)

### PV Array Calculator for the Magnum Energy PT-100 Charge Controller | Magnum Dimensions

Accurately calculate the number of PT-100 Charge Controllers you need based on your PV array.

www.magnum-dimensions.com

So I'm trying to get as much solar on this controller or very close. They have a PV array calculator, after using the calculator I'm under the impression that I can use a max of 1800 watts and still be within the parameters of this controller. Now the part that I'm unsure of .

So if 1800 / 14.4V = 125 Amps which is over the Max output of the controller. But the PV calculator says it's ok with a max output of 98.6 amps,

However if I divide 1650 / 14.4v =114.5 amps which is still over the max output. again the calculator shows it's fine with only 90 amps output.

So following that math I would only be able to use 1440 / 14.4v =100 amps. Again the calculator shows @79 Amps .I know that the panels are not putting out anywhere near 100 amps.

So I guess my question is which math is more correct? I don't want to burn out the controller by overpaneling it too far.

I looked at these panels

300 watt in a 3S/2P configuration

VOC 39.5

IMP 33.0

ISC 9.70

IMP 9.10

Here is a screen grab of the calculator

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