How far can panels be from inverters in a 48v setup.

[fromport]

Hi Tim, so looks like 20amps. I included the panel label below. Also included is a diagram of the set up with where I understand the fuses should go. Look correct? So I need four 20amp fuses for this set up? Sounds like we have similar setups. I also have 6kw of panels going into the two growatts into 2 EG4 batteries. Thinking of buying one more battery actually. Thanks so much again for your help. View attachment 100901View attachment 100902

Only with more than 2 panels/strings in parallel you need fuses.
Not when you combine just 2 to an inverter

 

[timselectric]

Hi Tim, so looks like 20amps. I included the panel label below. Also included is a diagram of the set up with where I understand the fuses should go. Look correct? So I need four 20amp fuses for this set up? Sounds like we have similar setups. I also have 6kw of panels going into the two growatts into 2 EG4 batteries. Thinking of buying one more battery actually. Thanks so much again for your help. View attachment 100901View attachment 100902

Yes, 4 20a fuses. Just like your diagram.

 

[timselectric]

Only with more than 2 panels/strings in parallel you need fuses.
Not when you combine just 2 to an inverter

Correct, not required by code. But, adds piece of mind.

 

[fromport]

Correct, not required by code. But, adds piece of mind.

I have found they often got corroded -> resistance -> heat buildup-> fuse blown for no reason (after years of working great).
For my peace of mind I don't put them in ;-)

 

[timselectric]

I only use high quality products in a weathered environment.
I don't like call backs, at my expense.

 

[fromport]

I only use high quality products in a weathered environment.
I don't like call backs, at my expense.

What exactly are you protecting with those fuses in a 2 parallel situation?

 

[timselectric]

Murphy's law
Burning down my house.

 

[fromport]

Murphy's law

Can you describe a Murphy's law scenario where a fuse would protect any of the equipment involved?

 

[timselectric]

Not the equipment, it can handle anything that the panels can give. But, my house isn't fireproof. (Nicked wires or whatever you would never expect to happen)

 

[Visionguild]

Thanks guys. I appreciate the input alot.

 

[onokai]

Only with more than 2 panels/strings in parallel you need fuses.
Not when you combine just 2 to an inverter

Fuses not required.

 

[fromport]

Only with more than 2 panels/strings in parallel you need fuses.
Not when you combine just 2 to an inverter

Fuses not required.

Copied from another thread about fusing solar:

How/When to Fuse a Solar Panel Array

This blog post is going to teach you how to determine when and if you need to add in-line fuses when designing a camper solar array. Sometimes you need to fuse your solar array, and

www.explorist.life

 

[timselectric]

Only with more than 2 panels/strings in parallel you need fuses.
Not when you combine just 2 to an inverter

Fuses not required.

Lmao
I think that six of us have said that, now.
But,
It's good to know that most people have learned it.