Costco 6V battery charge rate

coldchuck wrote:

NinerBikes wrote:


I would do this, and I would verify the voltage of a fully 100% charged battery at the battery terminals to be 15.0V, not what the charge controller says it's set at, there are voltage losses from line and length of copper wire run.

Yes, I got digital multimeter to measure the voltage. Just that I am not quite familiar with 6V batteries and its charging characteristics. I am much more familiar with 12V batteries of various configurations. I calculated my voltage losses from the panel to the batteries at 0.7% using 4AWG cable 18 foot distance from roof to the batteries (one way). The controller is located next to the battery compartment using 2 foot length. I did not use battery voltage sense wire but I could put this on if any of you felt its value is warranted to use it. I am using the remote temperature sensor on the negative post of the last 6V battery in the series. I hope I am doing the optimal practice.

I do have Progressive Dynamics PD9260C with charge wizard pendant already. My 5ver is parked next to my house but I don't need to have this camper plugged in all the time if tristar does a better job.

Calculations are nice, and theoretical. Measure the actual voltage you are getting at the batteries, at the connections, while charging, once fully charged. You want 15.0V at those ring terminals on the battery. All else is irrelevant. Your CG2 batteries are 5% antimony lead plates. Keep on top of the electrolyte level and replace when low with distilled water.

Adjust charge controller for solar panel accordingly until you negate any voltage losses due to wire diameter and distances involved.