Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I purchased a new brand GM C Suburban. I need to install a 8 cameras and NVR security camera system, 55" monitor, and 2 laptops in this SUV. We want to design this car as a mobile security office.

I need to know if I can install another 3 extra car batteries in parallel. Will there be any negative side effects?

can somebody help me to make 3 batteries in parallel work, as both will charge and discharge together so that I will get enough power view the camera system on 55" monitor while driving and/or when engine is set to idle.

What will it take to get this working ? Or is it even possible ?

share|improve this question
Consider also upgrading or/and adding an additionnal alternator for charging the battery. With 3 batteries and with that kind of current draw, the stock alternator won't be able to keep up. You could even install solar panel on the roof... – Gabriel Mongeon Apr 13 '14 at 22:18

I'd point you towards my previous answer to Adding a additional battery to car - You'll need to use deep-discharge leisure batteries rather than normal car batteries, and have them on a split-charge system so you don't drain the main battery while you're parked up.

All the stuff you'll need will be available off-the-shelf from a decent 4x4/RV/Marine supplier, as such systems are regularly used to power equipment in caravans and boats.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.