Trouble sizing my charge controller...

Hi!

I am building a 24V system and bought 4 LG Bi-Facial panels but I am having issues trying to decide which on to buy. You could say im a bit of a beginner in bigger sized system. I only worked on a 300w 12v van system before

The Panel specs are

Peak Power: 520 Wp

Voc (V): 49.8

Isc (A): 13.29

Vmpp (V): 41.6

Impp (A): 12.51

NOCT: 45 ± 3 °C

Module efficiency (%): 24.6

Maximum system voltage (V): 1500 (UL) / 1000 (IEC)

Maximum series fuse rating (A): 20

The salesman said I needed a 250/100 from victron ? would a victron 100/50 do or outback 80 ? would i need to connect them parralel to choose a smaller controller ?

anything helps !!

Just because the sticker says X, there is always X +/- a little percent.

Start by reviewing the rest of the messages. Learn how to hook up the panels in the various possible configurations.

With 4 panels, you can do 1 string of 4, 2 strings of 2, or 4 of 1, all three configurations end up with just two wires going into the controller.

1 string of 4 = 200 volts and 12 amps (max, the reality it will be more like 160V and 9~12 amps, it just depends on the sun at that time)
2 string of 2 = 100 volts and 24 amps (max, the reality it will be more like 80V and 18~24 amps, it just depends on the sun at that time)
4 string of 1 = 50 volts and 48 amps (max, the reality it will be more like 40V and 36~48 amps, it just depends on the sun at that time)

The higher the voltage, the smaller the wires needed. Most nearly all PV wire is 10 AWG (8 AWG is bigger and less common, but easy to get)

What matters most is that your solar charge controller is more capable than your panels will ever be. (This only applies to off-grid and battery setups)

Thanks for the information Jason, If I understood right. I could buy two victron 100/50 and do 1 string of 2 on each ? Or just use a renogy 100amp and do 2 string of 2 ? thanks

I have 3 stings of 2 panels all connecting to the same input on one controller. This where knowing how many amps and volts the controller can handle mstters.