Here here always include surge and voltage drop. On Jan 2, 2015 12:10 PM, "Larry" <la...@starlightsolar.com> wrote:
> Jay, > > Divide inverter capacity by LVD then divide by full load efficiency. > Example: 4000 Watt inverter shuts down at 42 volts, efficiency 85% = > 4000/42 = 95A/.85 = 111 Amps. Then it depends on the insulation and > conductor type and the corrections for ambient temp. > > How can you not consider voltage drop? This is important for the surge > capability of inverters. If the battery-inverter run is long you could have > significant voltage drop for a wire correctly rated for ampacity. > > Larry Crutcher > Starlight Solar Power Systems > > On 1/1/15 7:23 PM, jay peltz wrote: > >> Happy new year all. >> >> I have a question on wire sizing for the following. >> >> 250 amp breaker, in a UL enclosure ( say midnite or outback etc) >> conduit from battery box to enclosure >> >> I'm wondering how folks size this for ampacity not voltage drop. >> >> thanks >> >> jay >> >> peltz power >> >> >> >> >> >> _______________________________________________ >> 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://www.mail-archive.com/re-wrenches@lists.re-wrenches. >> org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> >> > _______________________________________________ > 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://www.mail-archive.com/re-wrenches@lists.re-wrenches. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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