Sorry, this is still misleading in the real world. > Identical wire sizes, wire lengths, and wire resistive losses, > regardless of whether wired for low voltage or high voltage.
There is no way you can wire 14 solar panels (10' by 20') array in parallel with the "same wire sizes and lengths" (and loss) compared to series. Physically impossible. Same is true for a dozen 12v car batteries. Impossible to wire them in parallel with the same lengths and wire sizes (and loss) as series, so your argunment is academically true, but obfuscates the real world. The truth is that lower voltage will always require more copper (for the same losses). In 1 foot cables between batteries, the difference is usually not worth worrying about. But ever since the wars of Edison and Tesla over a century ago, HV distribution will always take less copper for the same losses. But again, copper use is just part of the many overall design considerations. And in distribution of power, distance is always the main variable. Bob -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lee Hart via EV Sent: Wednesday, June 08, 2016 12:29 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Off-grid solar house and electric car charging David Kerzel wrote: > In example 1 series you have 2 12 inch leads out of the pack. > In example 2 parallel you use all the leads to connect them together > and the > 12 inch leads out of the pack are missing, They would add .001 ohm > each if the same size wire which is a second 40 watts. View with a fixed-width font like Courier. Ignore the dots; they just trick Microsoft into not deleting all the extra spaces. Example 1 (series), four 12" pieces of wire (the / and \): +O . . . . . . O . . . . . . O- . \ . . . . . / \ . . . . . / . .+ battery - . + battery - Example 2 (parallel), four 12" pieces of wire (/ and \): . .+ battery - . / . . . . . \ .O+ . . . . . -O . \ . . . . . / . .+ battery - Identical wire sizes, wire lengths, and wire resistive losses, regardless of whether wired for low voltage or high voltage. The purpose is not to show that one way or another is always "best". It ain't that easy! The point of these examples is that you have to THINK about how things are wired, and not just fall for conventional wisdom that is often inappropriate or even wrong. -- "IC chip performance doubles every 18 months." -- Moore's law "The speed of software halves every 18 months." -- Gates' law -- Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
