Help sizing mppt charge controller with 260 w 38v panels

kobylyoung

Hello, 

I need recommendations for sizing a system around solar panels that came with the off grid property I bought. They are in the shed doing nothing, so might as well get them up and running.  The panels are 260 w 38v panels.
I've taken a picture of the back and attached it below.

Here is the battery I'm trying to charge:
12.8 v 460AH with 300 amp bms.

https://a.co/d/fgQLbLD

What are the best recommendations for this application including possible four-string combiner box with 15 amp fuses?
Looking to charge fast whenever the sun shines.

Thanks for your help!

SumPower

How many panels do you have?

What are your loads? 120 volt only? 240 volt?

Do you have already have an inverter? 

kobylyoung

I have 4 extra panels not being used, everything runs off 120v, and yes I have a 3000 watt pure sine inverter.

SumPower

with the Voc of 38 volts. If I understand this correctly, you have four total panels.

2 panels in series would = 76 Voc so any  100 volt rated charge controller would work.

So for 4 panels you would want two each of the Victron in the link.

https://www.solar-electric.com/victron-energy-smartsolar-mppt-100-15-charge-controller.html

MikesSolarGarage

What are the PV voltage specs on your inverter or MPPT charge controller?  That will make a big difference on how the panels should be wired.