Have I finally found panels for my LV 6548?

[TheCoachStone]

A local seller has some new Tallmax 335 panels - VMPP 37.9, IMP 8.84

EDIT: VOC is 46.3

I have an up and running LV6548.

Solar Charging Mode
Solar Charger Type MPPT
Number of MPPT 2
Max. PV Array Open Circuit Voltage 145Vdc
PV Array MPPT Voltage Range 60~115Vdc
Min. battery voltage for PV charge 34Vdc

Typical Amperage 80A

It looks like I can run 3 in series at 114V and 8.89A. So, 9 would be 3015W.

Is my math here correct? Would I need to fuse each group of 3?

 

[Texican]

why not get 10 and run 2 strings of 5 ? 114v is pretty low

 

[Texican]

actually your VOC is 46.3, thats the number to use
5 in series is too close to 250v
4 is good, under 200v
to keep strings the same you need an even number of panels

 

[raurre]

A local seller has some new Tallmax 335 panels - VMPP 37.9, IMP 8.84

I have an up and running LV6548.




It looks like I can run 3 in series at 114V and 8.89A. So, 9 would be 3015W.

Is my math here correct? Would I need to fuse each group of 3?

My system has 4 lv6548. The max input voltage is 250v. You want to base that number off of the VOC of the panels. This is my build if you're interested. Thread '4 MPP LV6548 / 30 kW EVE 304ah LiFePO4 battery/ 14 kW PV array' https://diysolarforum.com/threads/4-mpp-lv6548-30-kw-eve-304ah-lifepo4-battery-14-kw-pv-array.32343/

 

[LydMekk]

4 per string is ok. That would make each 200V and nicely under the 250V max.

 

[TheCoachStone]

My system has 4 lv6548. The max input voltage is 250v. You want to base that number off of the VOC of the panels. This is my build if you're interested. Thread '4 MPP LV6548 / 30 kW EVE 304ah LiFePO4 battery/ 14 kW PV array' https://diysolarforum.com/threads/4-mpp-lv6548-30-kw-eve-304ah-lifepo4-battery-14-kw-pv-array.32343/

Ok, you can never see my setup. Yours is so clean.

 

[raurre]

Ok, you can never see my setup. Yours is so clean.

What is the voc for the panels? You need to keep the voltage as high as possible without going over the max input voltage. Keep in mind that the voltage will increase under cold conditions. Your max amps input will clip at 20.

 

[TheCoachStone]

What is the voc for the panels? You need to keep the voltage as high as possible without going over the max input voltage. Keep in mind that the voltage will increase under cold conditions. Your max amps input will clip at 20.

VOC is 46.3

 

[TheCoachStone]

4 per string is ok. That would make each 200V and nicely under the 250V max.

That is what I am thinking. It will be under for the max wattage, but it will charge the batteries to charge my truck over night.

EDIT: Also, will I need a fuse?
Max Series Fuse Rating - 15A

 

[LydMekk]

The way I have my setup is each string comes into the tech room to a PV disconnect switch.
Then through a 10x38mm fuse (20A) and then each string continuing to each inverter (have 3).