Originally Posted by Hardin Thicke
That's good to hear. I was concerned as to how the intelligent charging system would react to the load of the second battery. I'm using it for amateur radio gear which pulls about 25A on transmit, but less than an 1A on receive.
Adding a second battery isn't going to help you with your required 25 amps.. amperage comes from and always will come from the alternator. Adding a second battery without upgrading the alternator will place your alternator under greater stresses shortening its life and reducing its effectiveness. I'm not sure if the Tahoes that came with the dual batteries have beefier alternators than those without the second battery? Anyone?
Anyways, adding a second battery helps mainly one thing... Capacity: The ability to use reserve power longer without the vehicle running.
If you are looking for amperage, start with the alternator. This goes for you stereo guys as well.. adding batteries or caps without addressing your alternator is counter-productive at best.