Panel configuration help

[outboard1196]

Hi all this is my first post , I've had my system running for about 6 months . I'm adding more panels just want to check make sure its OK .
I currently have a renology rover 30A with 12v system 200w panels.
Spec is 400w max for 12v and 95v PV input .
I'm wanting to go to 400w of panels .
Originally I was going to put them all in series since my run from panel to charger is kind of long about 50ft .
But doing the math for max panel voltage in cold weather I get a max of about 106v . so I should do two series in parallel to be safe ?
And each parallel string have a 5a? Fuse ? Panel has open current max of 5.2A short circuit 4.9A .
Thanks

 

[sunshine_eggo]

4S too high
2S2P sounds good

2P does not REQUIRE fuses, but you can. Panels should have max fuse size on them. Probably 10 or 15A. Use that.

 

[outboard1196]

4S too high
2S2P sounds good

2P does not REQUIRE fuses, but you can. Panels should have max fuse size on them. Probably 10 or 15A. Use that.

Panel does say 15A max
I assumed once you added anything in parallel fuses should be used .
Thanks

 

[sunshine_eggo]

Panel does say 15A max
I assumed once you added anything in parallel fuses should be used .
Thanks

Fuses protect wires. 2P or less, you won't overload the wire. 3P could exceed the wiring if two panels are dumping into the third.