Author Topic: Disconnecting both Positve & Negative of array  (Read 2891 times)

labusker

  • Newby
  • *
  • Posts: 24
Re: Disconnecting both Positve & Negative of array
« Reply #15 on: October 18, 2019, 12:38:27 PM »
Thanks Vic again. MNPV6-250 Disco
I found the MNPV6-250 disconnect box which would give me 2 300v breakers for each set of 4 panels. The 3rd breaker would be used to connect the neutral wire to. The disconnect handle would de-energize all conductors at the same time (and of course a much more expensive box).
There are a few 72 cell panels that have good wind ratings, most do not. My coldest temp in south Louisiana would not be less than 28 degsF. I think 72 would work, but would have to use 6 panels instead of 8. Growth beyond this would not be in the cards, so would like as many watts as possible. Best wattage would be obtained by using 8 approx. 315w panels in my allowed space.
Off Grid DIY, Adjustable Ground Mount, 2S3P 375W Mission Solar, MNPV6-Disc, MNDC125, Classic 150, Aims 48V Inverter/Charger, 8 370Ah Duracell 6V batteries in series

Vic

  • Hero Member
  • *****
  • Posts: 2372
Re: Disconnecting both Positve & Negative of array
« Reply #16 on: October 18, 2019, 09:55:49 PM »

There are a few 72 cell panels that have good wind ratings, most do not. My coldest temp in south Louisiana would not be less than 28 degsF. I think 72 would work, but would have to use 6 panels instead of 8. Growth beyond this would not be in the cards, so would like as many watts as possible. Best wattage would be obtained by using 8 approx. 315w panels in my allowed space.

Hi Drew,

OK,   but,   regarding using 72 cell PVs,   six total,   would this be two strings of  three,   and a 150 V MNPV6 Disco Combiner,  with 48 V ?

Three strings of two of two 72 cell PVs would probably not have a high enough Vin for a Classic with FLAs at 48 V.

Just wondering,   Thanks, Vic
Off Grid - Two systems -- 4 SW+ 5548s, Surrette 4KS25 1280 AH X2@48V, 11.1 KW STC PV, 3X MidNite Classic 150 w/ WBjrs, Beta KID on S-530s, MX-60s, MN Bkrs/Boxes.  Thanks MN for Great Products/Service/Support!