I'm involved with a clinic in Haiti (www.healingartmissions.org
). In 2010, we installed 1560 watts of PV panels (130 watt, 3 strings of 4 panels), a Magnum MS4024 inverter, an Outbox FM60 charge controller, and a MidNite Solar E-panel for the MS4024, and a 24volt battery bank (12 Trojan T105s, 3 strings of 4 batteries).
We are working on expanding the system. The current plan is:
- Replace the Outback charge controller with one Classic 150
- Add eight 300 watt PV panels (RPSG-300W-PE) in four strings of two panels plus a combiner box
- Add a second Classic 150 for the 2400 watts of new panels
- Whiz bang Jr.
- Replace the battery bank with 8 Trojan L16H-AC 6 volt batteries in two strings of four batteries
There is no room in the existing e-panel for the input and output breakers for the second Classic 150 so we need to put the breakers in a separate enclosure.
According to the Classic Sizing tool for these PV panels:
- Rated PV Array Current: 32.88 Amps
- Battery Charging Current @ 28.8V: 83.3 Amps
I'm planning on using #4 wires from the combiner box to breaker to Classic 150 to breaker into the e-panel and keeping the runs as short as possible within the available wall space.
For the Classic 150 input, a 40 amp or 50 amp breaker should be ok.
For the Classic 150 output, we need a 100 amp breaker.
For space and neatness, I would like to use one box for both breakers. I have figured out two possibilities:
- DIN Rail Mount breakers (MNEPV-50 and MNEPV-100) and a Big Baby Box Enclosure
- Panel mount breakers ( MNEDC-50 and MNEDC-100) and a MNEDCQUAD enclosure for panel mount breakers
Any opinions on which option would be better for this application?