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Question about DIY solar wiring off grid in Hawaii
#5
Difficult to answer without knowing the battery arrangement.

Interconnect size matters; it's best if these are larger than the feed wiring. The "cross-corner" connection described above is actually best practice (and described somewhere in the Outback documentation).

The other issues are "how many things can you fit on the battery terminal". Simple installations can use terminal risers (if you find these), but a terminal block is really the best solution. Example:

https://lugsdirect.com/7006-4-14AWG-2-0-...re-lug.htm

These exist in other configurations and in a "multi" with insulated base and separators. Otherwise use nylon hardware to bolt them into a plastic junction box. Mount it on the wall with all your charge controllers. Large barrel to a big battery cable, charge controllers and DC distribution on the small barrels. Connect inverter directly to batteries or daisy-chain the DC block off the inverter (or its class-T fuse and shunt if your system has these, which it should). This reduces the system to one or two battery connections, which will easily fit stock terminals.

Use a standard automotive pigtail fuseholder as the connection between charge controllers and the terminal block. ATC fuses are rated for 32V.
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RE: Question about DIY solar wiring off grid in Hawaii - by kalakoa - 02-05-2019, 04:29 PM

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