Breakers and amps

[jmygann]

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

[Halfcrazy]

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

[Robin]

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.