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Title: Breakers and amps
Post by: jmygann on March 30, 2012, 06:04:41 PM

6 strings of 3 .... using a Midnight classic 150 controller

MNPV6 combiner box

6 breakers ????? amps ??

18 sharp 240w panels

Maximum Power (Pmax)* 240 W

Tolerance of Pmax +10%/-5%

Type of Cell Monocrystalline silicon

Cell Confi guration 60 in series

Open Circuit Voltage (Voc) 37.4 V

Maximum Power Voltage (Vpm) 30.1 V

Short Circuit Current (Isc) 8.65 A

Maximum Power Current (Ipm) 7.98 A

Module Effi ciency (%) 14.7%

Maximum System (DC) Voltage 600 V

Series Fuse Rating 15 A

NOCT 47.5°C

http://midnitesolar.com/smf_forum/index.php?topic=499.0

Title: Re: Breakers and amps
Post by: Halfcrazy on March 30, 2012, 07:12:56 PM

The panel manufacturer recommends the breaker sizing. In the data you provided the manufacturer recommends a 15 amp series fuse rating. So you would need 6 of the MNEPV-15 15 amp 150 volt breakers

Ryan

Title: Re: Breakers and amps
Post by: Robin on April 29, 2012, 07:52:57 PM

In the future, UL is suppose to be changing the words "series fuse" to something like series over current protection. UL seems to have forgotten about the off-grid market.

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Disconnect Boxes and Breakers => E Panel's, Disconnect Boxes and Breakers => Topic started by: jmygann on March 30, 2012, 06:04:41 PM