I would and do use a 2/0 battery cable for a 4KW inverter. Anchor is an excellent marine cable, but not a #2.
Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ [1] e-mail offgridso...@sti.net [2] text 209 813 0060 On Tue, 11 Aug 2020 15:18:22 -0700 (PDT), "peter...@pobox.com" wrote: I have been designing a off-grid system that can fit in an outside-accessible compartment with an approximate 24" square footprint and space above about 18" - 24". I am using two Battle Born LiFePO4 batteries rated at 24 V / 50 Ah, a Cotek pure sine wave inverter with an output power of 4,000 VA , a MorningStar TS-MPPT-60 charge controller, a Victron BMV-712 "coulomb counter" and a Battle Born surge limiter CL500. The current limiter limits the current to 120 continuous, and 200 A for 30 sec. I have been able to fit everything in and I am designing the cabling, and here is my problem. I have one vendor that recommends Ancor brand Tinned Marine Grade Battery Cable. It is "resistant to salt water, battery acid, oil, gasoline, heat, abrasion and ultra-violet radiation. Exceeds UL 1426, ABYC and US Coast Guard Charter boat (CFR Title 46) standards. Highest quality ultra-flexible (Type 3) tinned copper stranding. Vinyl insulation. -50 deg-C to 105 deg-C." 2 AWG is composed of 665 ea 30 AWG stands. The same vendor has "welding cable" with an EPDM insulation rated at 600 V, water/chemical/grease/abrasion resistant, -50 deg-C to 105 deg-C, "marine grade". Not UL listed. 624 ea 30 AWG strands. Roughly comparable pricing. They claim both 2 AWG cables are rated at 210 A. Not sure if this is continuous duty or whether I should derate this for what will be continuous duty. This is new territory for me, and any help would be appreciated. Peter T. Parrish, Ph.D. President, California Solar Engineering Links: ------ [1] http://members.sti.net/offgridsolar/ [2] mailto:offgridso...@sti.net
_______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
