Can combine solar panels 265w different voltages?

[jasontyo]

Hello guys, thanks for all the help I am receiving everytime I ask a question. Much appreciated.

I have the growatt spf 3000tl lvm-es, I bought 6 Jinko solar panels 265W
(VOC): 38.6 V
(VMP): 31.4 V
(ISC): 9.03 A
IMP: 8.44 A

Can I combine these panels with the: Kyocera 265W ?
(VOC): 38.3 V
(VMP): 31.0 V
(ISC): 9.26 A
(IMP): 8.55 A

The ran out of stock for the panel I bought and I want to buy extra 6 to put in parallel with the 6 from jinko.

thank you.

 

[Rocketman]

Yes you can but there will be a penalty.

The way to figure it out is to remember that when you combine panels one factor adds and you use the lowest of the other one. (Use Vmp and Imp for these calculations).

In series - voltage adds - amps use the lower one.

In parallel- amps add - volts use the lower one.

So your Jinko panel string is: 31.4 times 6 = 188.4v and 8.44a

A Kodecera string will be: 186v and 8.55a.

If you put those two in parallel you will have 186v and 8.44 times 2 = 16.88 a. That will give 3139 watts. If both strings were on their own mppt you would have 3180w - so your mismatched panel penalty is 41 watts.

Now you will have to decide if that penalty is worth it. I would say yes, but it is your call.

I don’t know anything about the Growatt - so I don’t know if this is a good idea (or not) on it. I am just working with the panel math.

Good Luck with your project.

 

[jasontyo]

Yes you can but there will be a penalty.

The way to figure it out is to remember that when you combine panels one factor adds and you use the lowest of the other one. (Use Vmp and Imp for these calculations).

In series - voltage adds - amps use the lower one.

In parallel- amps add - volts use the lower one.

So your Jinko panel string is: 31.4 times 6 = 188.4v and 8.44a

A Kodecera string will be: 186v and 8.55a.

If you put those two in parallel you will have 186v and 8.44 times 2 = 16.88 a. That will give 3139 watts. If both strings were on their own mppt you would have 3180w - so your mismatched panel penalty is 41 watts.

Now you will have to decide if that penalty is worth it. I would say yes, but it is your call.

I don’t know anything about the Growatt - so I don’t know if this is a good idea (or not) on it. I am just working with the panel math.

Good Luck with your project.

thank you so much

 

[Rednecktek]

The panels are so close together that the expense of optimizing SCC's to get that extra 40w just isn't worth it.