Ampere Drop calculator

[Stuart2610]

Hi, I am looking for a way to find out how many amps will be lost according to what thickness cable and length you use. I have a client that is getting 30Amp from his panels but wants to know how many amps will be lost over a distance of 40Meters with a 25mm2 cable??

[russ]

Various calculators

1 - http://site.devicecraft.com/Applicat...tanceTable.pdf
2 - http://www.powerstream.com/Wire_Size.htm
3 - Wire size calculator http://www.freesunpower.com/wire_calc.php
4 - Voltage drop calculator http://www.csgnetwork.com/voltagedropcalc.html
5 - Sizing and protection of conductors http://www.electrical-installation.o...mpaign=Apprima
6 - USA wire-cable http://www.usawire-cable.com/resources.html

[Sunking]

Your barking up the wrong tree. You do not loose amperage, you loose voltage.

[Mike90250]

spreadsheet for solar power:

http://www.solar-guppy.com/forum/download/voltage_drop_calculator.zip

Very useful for the entire system

[Offgrid]

If you listened to earth4energy and made your own panel (32 cells x 0.5 = 16V not atleast 20V) you can kick yourself as well.Might as well put you batterys on the roof next to your panels. :P

[adamjoony]

The resistance values for the stranded copper wire sizes shown in the tables below (sizes that are typically found in an automobile) are from http://www.mogami.com/e/cad/wire-gauge.html, a 2% lay factor is assumed and diameters are approximate. The lay factor relates the diameter of the helical wire path and the length of braided strands (360

[Mike90250]

....Might as well put you batterys on the roof next to your panels. :P

I always wondered how they made solar batteries