Aux battery dilemma - Big Gel or small Wet Cell (1 Viewer)

Joined
May 20, 2020
Messages
8
Location
Austin, Texas
(10-21-20 moved to Power Systems)

Wow , getting set up for power gets complicated...
I got an ARB fridge (50qt) and a deal a 200Ah Renogy GEL battery with Ctek D250SA charge controller. I have a 100 W solar panel in bound (Rockpals)

Renogy 200Ah GEL battery

The issue came then that the Renogy GEL battery wants a charge voltage of 14.2 per the manufacturer. The Ctek charger controller has some awesome features (manages alternator or solar inputs, isolates crank and aux battery, 20A charging feed, selectable wet cell/AGM, etc.). However, it lists its output voltages as 14.4V or 14.7 volts depending on if wet cell or AGM batteries are used (again, selectable).

So, what will happen if I charge the Renology GEL battery on the closest setting it allows, the 14.4 V? I emailed both Ctek and Renogy and got somewhat incomplete answers. Renogy says "yes you can, but be advised that you may reduce the life of the battery". But by how much?

I don't want to kill this beast of a battery, but I also don't want to have to buy a different charge controller. What would the long term effects of charging it on 14.4V instead of 14.2V?

Any input would be appreciated.
 
Last edited:

uHu

Bridgeburner
Joined
Nov 27, 2005
Messages
2,073
Location
Oslo, Norway
Lithium is the way to go for a dedicated fridge/freezer/camping battery. It will outlive a gel lead battery a few times over.
 

blackohio

SILVER Star
Joined
Jun 14, 2020
Messages
215
Location
90815
I've run wet, AGM.
If you run wet golf cart batteries, 2 6V 200ah batteries are like $220 total. downside. HEAVY Probably 55lbs each
AGM I've run 2X Optima 12V batteries making about 150ah. Good, but costly.
AGM I've also run a Giant Northstar 217ah AGM. It was AWESOME, and about $800 but weight 150 f***ing pounds.
The golfcart and Optimas were fed by 150watts solar + renogy MPPT Controller.

The Northstart was fed by 200 watts solar + Renogy MPPT controller

Lithium is light power, but typically $$$ in the 150+ AH ranges.

TRUCK-CANOPY - 04.JPG


24C61082-2882-438B-B71A-BA52E49F80C3-10790-00000728F3B2CC69.JPG


6A27D4F9-A70F-4531-8CDD-7158B065196B-10790-00000728FD646ADD.JPG
 

Users who are viewing this thread

Top Bottom