Connecting my 2 Batteries to 1 Solar Panel

ZAP:
The HQRP looks great. I wonder if three conductor cable (for example, commonly available cable reels) can be used with this. Do you know if the charger read 0 Ohms measured between the two battery negative terminals?
Jim

On Tuesday, January 1, 2013 6:26:13 PM UTC-8, RAS56 wrote:
I took the easy way out and ordered one of these:

http://www.amazon.com/gp/product/B00...ls_o05_s00_i00

ZAP

On 1-2-2013 15:42, wrote:

Dan,

The circuit you presented already is a parallel circuit in regards the batteries. Looking at it, I'm assuming the diodes are there to prevent damage to the batteries& the controller if one of them is hooked up reverse. In that case, I'd use two diodes.

Regards,

Chris C.

I didn't look at the circuit, but diodes are usually installed in series
between the panel and the battery to keep them from discharging through
the panel at night when it's dark and they aren't charging.

Scott

Scott,

First off, I'm a student pilot so I do not post on this forum much because I try to stay silent and learn from you all. That being said, I do have some knowledge with electronics. My initial assumption was that the diodes will act as an rectifier to prevent reverse polarity connections with the batteries. However, the solar cells could become a "load" at night and the situation you present did happen if there were not diodes there to prevent that. However, I have to believe the controller's internal circuits would prevent that from happening. So, I'll admit, my knowledge of the controller is limited. Anyone have some input on this?

Chris,

Jim,

I am unsure of the question you are asking me...But all I use is a couple of lengths of 2 conductor cable to each battery. If you can be a little more detailed for this non-electrical engineer type, I am glad to do a little research for you.

Rob
ZAP

Rob metered his charge controller and discovered that the negative terminals on the HQRP Duo Charge Controller are common.
A three conductor cable can be used for two batteries.
Jim