[RE-wrenches] wire sizing question

[Larry]

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
>
>
>
>
>
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