Need to parallel three 405W panels

[BorisTheCat]

Hey, everyone.

I'm thinking of getting three of these panels to be hooked up to Electrodacus SBMS40:

Canadian Solar HiKu6 Mono PERC
CS6R 405MS
Nominal Max. Power (Pmax) W 405
Opt. Operating Voltage (Vmp) 31.0 V
Opt. Operating Current (Imp) 13.07 A
Open Circuit Voltage (Voc) 37.0 V
Short Circuit Current (Isc) 13.93 A
Module Efficiency 21.0%
Operating Temperature -40°C ~ +85°C
Max. System Voltage 1500V (IEC/UL) or 1000V (IEC/UL)
Module Fire Performance TYPE 1 (UL 61730 1500V) or TYPE 2 (UL 61730
1000V) or CLASS C (IEC 61730)
Max. Series Fuse Rating 25 A

How would you safely parallel these as 3 or more strings\panels in parallel must be individually fused. Is there a reasonably priced off the shelf solution? Am I better off building my own combiner box?

Thank you.

 

[MisterSandals]

Electrodacus SBMS40

I am curious about why you chose this as your platform?

What is your battery voltage you are matching those panels to?

 

[BorisTheCat]

I am curious about why you chose this as your platform?

What is your battery voltage you are matching those panels to?

I bought it years ago for a project that had to be abandoned shortly after. Figured I might as well use it since I already have it. Battery is 24v (8 230Ah EVE cells). What I'm trying to do is power my recreational getaway during the warm and sunny months.

Thanks.

 

[MisterSandals]

How would you safely parallel these as 3 or more strings\panels in parallel must be individually fused.

https://www.amazon.com/Combiner-Waterproof-Lightning-Arrester-Current/dp/B0C2CL971W/

There are a few options, just make sure the amps are high enough as some are 10A fused.
There is some decent functionality built into these and it'd be hard to make for less.

 

[BorisTheCat]

Yes, I was looking at those, but are they safe to use in my situation even if I up the fuses to 25A? Let's take Vevor box for example; does it look like it can handle potential 42A? They all seem to be rated 10-15A regardless of the size of the fuse.

Vevor box: https://tinyurl.com/vf2kh6re

Thanks!

 

[MisterSandals]

but are they safe to use in my situation even if I up the fuses to 25A?

The fuses protect the wire so it depends on what wire, how long. Why would you want 25A when the max Isc is 13.9A?
I suppose you could get nuisance fuse blows. But first and foremost the fuses need to be sized for the wiring and you have not provided that info.

 

[BorisTheCat]

Each source OCPD must be 13.93 x 1.56 = 21.73, round it up to 25A
Source cable must be rated for more than OCPD - AWG10 (30A)
AWG6 from combiner to SMBS

Am I on the right track here?

Thanks

 

[seneysolar]

MidNite Solar MNPV3 Solar Array Combiner

MidNite Solar MNPV3 Solar PV Array Combiner Box

www.solar-electric.com