Hooking everything up

Hey everyone, I now have the basics for my system and have spent several days trying to figure out how it all gets connected together. I have a friend in the business who has generously offered to help wire it all up but I need to come up with the plan and list of materials first.

Basically, I'd like to order everything I'm going to need that can't be bought locally at HD/Lowes/Harware store/Electrical Supply etc. I'd be very grateful if people could look at my shopping list and suggest any additional items I'm overlooking since this is my first time at this.

Basic System:
(6) 215W Evergreen Panels arranged into two strings of three panels.
(1) Midnite Solar Classic 150 Lite Charge Controller
(4) 12v AGM Batteries wired to 300AH @ 24v (undersized but will upgrade in the next year or two)
(1) Xantrax Prosine 1800 24v Inverter

What I have for wire and overcurrent protection:
Array to Combiner Box: #10 MC4 cables to two 150VDC 15A breakers in combiner box.
Combiner to Controller (88'): #10 tray cable with one 150VDC 30A breaker before conroller.
Controller to Batteries (5'): #2 with 48VDC 100A breaker
Battery Interconnects (1-2'): #2
Battery to Inverter (5'): #2 with 48VDC 150A breaker


So I'd like to just sketch out my thinking on how this will all work...

Each string of panels will max output 12.69A Isc and 126Voc (with 1.56 safety factor included, Isc is 8.12)

I'll take the 4 wires from my two strings of panels, cut a couple of MC4 connectors in half, and use the resulting pieces to bring the 4 wires into a combiner box such as this http://www.solar-electric.com/mnpv3.html. I can run each of the two positive wires through a 150VDC 15A breaker. With the two strings now combined, I'll be outputting max power of 26A Isc and 126Voc.

I'll run #10 2 conductor tray cable the 88' from the combiner box to the equipment cabinet that houses my batteries, charge controller, and inverter. It will then go through a 150VDC 30A breaker before going to the charge controller.

After the charge controller, I'll be running #2 welding wire to the battery bank. This will run through a 150VDC 100A breaker.

The battery bank will be connected via #2 welding wire as well. Do I need fuses at the battery if I have a breaker on each side?

The battery bank will connect to the inverter via #2 welding wire and go through a 150VDC 150A breaker. Is this undersized? The inverter surges around 3000W so at 24V that's around 125A max rough math.

Well that's my basic plan, thanks for reading. Does that seem reasonable? I don't know anything about grounding yet but I do have some grounding rods. Can I buy the wire and other materials for that locally? Do I need to think about a lightning arrestor or can that be added down the road a bit. Anything else, do I need grounding lugs for my solar panels? They seem crazy expensive, can I just rig something up with local materials?


Thanks!!

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