Using up voltage limits.

[crxvfr]

22 - 70 volt .6 amp panels. 924 watt array

Ok, the tristar 45 seems to be a good match.

Since it's capable of 150 volts, would there be any advantage or disadvantage if I made it 11 parallel pairs of 142 volt 6.6 amp panel array instead of hooking them all series for 71 volt at .6 amps?

Also, a 48 volt battery system can take 3200 watts and a 24 can take 1200 watts. I will only be at 900 or so watts. Are there advantages of having a 48 volt battery system or should I be aiming for 24 volt battery since I only have 900 watts.

Yes, I realize I am doing it backwards again, but so far, so good. I had not planned to start buying panels first but the price was right. I'm hoping he will still have some left when I have more pv money. After shipping, it's about 1.30 a watt for bp/solarex tempered glass panels. The price of the glass alone, when pricing stuff to make my own, would cost nearly as much, if not more.

[Mike90250]

142V is too close to the 150V burn-out limit. ( for my taste )

48 V systems have much less loss in the wires, than lower voltage systems,
more likely to be able to have batteries in 1 series string, instead of parallel strings.
(parallel strings get messy - sometimes unbalanced)

[Sunking]

Jo I suspect those panels you have cannot be used with 2 panels in series. What is the Voc and temperature coefficient of those panels. I think you are quoting the Vmp voltage. The 150 volt max limit is calculated using temperature correct Voc voltage using the coldest record temps in your area.. So if your panel Vmp voltage is 70 volts, I am sure the Voc is going to be higher than 75 volts.

Look at your controller specs. There should be a graph showing the input vs output voltage efficiency.

[crxvfr]

Okey Dokey,

71 volts is the max output but seeing as how they are new, might cause some problems at first by producing more. I also did not like the phrase Mike used, "burn-out". Nope, ...don't want to get that kind of experience. 71 v it is.

Thanks guys. The picture in my head is almost complete.
Now I have to make the structural supports, and remove a tree or two.

[Sunking]

Jo what is the Voc spec of the panel?

[crxvfr]

Jo what is the Voc spec of the panel?

Open circuit voltage - 98v

I'm getting close to putting these things up.

I started a Project Thread to make it easier to get all my ducks in a row.

There is an image there that I'm pasting stuff to that has most of that info.

Thanks SK

[MarineLiner]

I started a Project Thread to make it easier to get all my ducks in a row.

[crxvfr]

[QUOTE=MarineLiner;11522]

[crxvfr]

[QUOTE=MarineLiner;11522]

[MarineLiner]

OKEY, DOntKEY,
the double-duck seems like Irfan and me when i told him: let's DIg deep here or let's DIve deep here, in this forum.

the double-cat, any link? i'm curious.

[MarineLiner]

My double-nozzles post went to moderated


This Double-nozzles just went to "moderated post".
Thanks to our "mod" who help me bring it up.

[crxvfr]

OKEY, DOntKEY,
the double-duck seems like Irfan and me when i told him: let's DIg deep here or let's DIve deep here, in this forum.

the double-cat, any link? i'm curious.

That's just something we used to say as kids.

Like if you were playing a game and you wanted to psyche your opponent out (trip him up mentally), you would tell him you're putting a "double cats a** (ass) whammy" on them. I thought it was more popular, but it seems just a local thing because google doesn't even recognize it.

Double Nozzles was good.
...it has the same childish Dr. Suess like sound to it.

I have to get back to work for awhile now. Seeya.

[MarineLiner]

OK, dokey, turnkey.
Thanks, it "us