Using RF coax cable as DC Solar PV cable

Xringer · 12-12-18, 08:54 PM

Wow! I can't believe people still read these old threads..
A long time ago, I gave up on trying to control the DC power from the PV arrays.
I just keep an eye on the water temperature, tell my wife to turn on the dishwasher,
or I just enjoy a nice extra long hot shower to regulate the water tank temp..

To sum up the test results of using RF Coax to deliver DC power from solar arrays, it works.
(Has been working for almost six years).

I'm not sure what the max current limitations are, but in series configuration,
8 Amp panels put out a max current of 8 amps. (Into my 13 ohm heater loads IIRC).

Because they are buried cables (not in conduit), I regularly measure for leakage to ground and for normal power conduction.
So far, the cables have performed like new. I'm guessing their life span is in the 20+ year range.

12-12-18, 08:54 PM	#39
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Wow! I can't believe people still read these old threads.. A long time ago, I gave up on trying to control the DC power from the PV arrays. I just keep an eye on the water temperature, tell my wife to turn on the dishwasher, or I just enjoy a nice extra long hot shower to regulate the water tank temp.. To sum up the test results of using RF Coax to deliver DC power from solar arrays, it works. (Has been working for almost six years). I'm not sure what the max current limitations are, but in series configuration, 8 Amp panels put out a max current of 8 amps. (Into my 13 ohm heater loads IIRC). Because they are buried cables (not in conduit), I regularly measure for leakage to ground and for normal power conduction. So far, the cables have performed like new. I'm guessing their life span is in the 20+ year range. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..