Odyssey and Northstar batteries have extremely low resistance and high CCA ratings, meaning they are good at holding their voltage higher under higher loads than other batteries, and when discharged they can accept huge recharging currents too. If you have no need for powering anything with the engine off, I'd look into getting a larger AGM battery in place of the original instead. When they are different, they charge at different rates and discharge at different rates and the weaker of the two batteries will rapidly degrade the better of the two batteries. Ideally, batteries which are paralleled should be the same make/size and age and condition. If there is no need to power anything with the engine off, then I would recommend just putting a larger battery in place of the original rather than parallelling two through a relay. There are multitudes of ways to allow battery charging voltages to reach a secondary battery and have the batteries isolated with engine off. Rectangular AGMs have 25% more capacity than the Six pack spiral AGM's of the same footprint.ĪGMs tend to weigh more for the same capacity as flooded/ wet batteries. Some AGMs like Odyssey and Northstar have Very high CCA ratings and deep cycle ability, but when deep cycled absolutely need high recharge currents applied for long enough or battery life will suffer. I assume you will be running the engine when running the winch, so while true deep cycle flooded batteries have Low CCA ratings, they are not so low as to not turn the winch fast enough, and the alternator likely will take up a good portion of the load. A marine battery is a dual purpose battery, and while it says deep cycle on it, a true deep cycle battery is constructed much differently.
Starting batteries really degrade badly when discharged below 80% regularly. The diode based isolators, that have large finned heat sinks waste power and drop charging voltages. If you add too much constant load you have to add a second alternator, hence the PTO question. And even with the LED lights don't go wild and put on so many that even with the lower load per light the total exceeds the capacity of the alternator. And you are not going to want to use the lights for only a few minutes.įor brief large loads like the winch, you can rely on the second battery.īut for constant loads like lights being on continuously the alternator has to carry the load, so it would be very wise to minimize that load by using LED lights. If you place enough steady load on the alternator you will burn it out regardless of how big the second battery is, the alternator has to carry the steady load. +1 on what eljefino said "I'd think pretty seriously about LED lighting just to cut the load." You can use a ford starter relay and I'm sure RV stores would have what you want. I'd think pretty seriously about LED lighting just to cut the load. Good luck.ĭo you have a PTO in a place where you could rig up a pulley and alternator? Since the battery is isolated when not running, there is no issue with self drain down from "Battling batteries". I see no reason for not using a marine starting battery, or even a Optima yellow top. You should size the isolator and relay for 30 amps (420watts), to my reckoning.
#Battery doctor isolator full
Shorter interval use (ie, winch) of the full 450 watts should not be an issue. About 100 watts should keep the normal requirements satisfied, leaving about 125 available for sustained use. For normal use, I would figure about half that, unless you operate it near redline all the time. Your buggy has a output wattage of about 450 watts.
but making sure the components are compatable is my concern if im not going to buy a pre fab kit and I am going to buy the parts separately. I have a plenty of experience in this subject when installing lights, winches, stereos, etc and of course and running wires. My Polaris Ranger had a "Polaris kit" that ran a second atv sized battery (same size as the starting battery) however when using offroad lights or pretty much anything that isolator was constantly "clicking" moving power to the second battery. #2 should both batterys be the same size ? I was intending on mounting a oversized marine grade battery under the seat of my machine for all the extra's I will be running. Cleary wont be as high as a car's alternator. that said, how large of a isolator/relay should I be using ? no clue what he power output of the stator on a UTV is.
Im going to add a second battery, isolator/relay to my new UTV Kawasaki Teryx.
#Battery doctor isolator free
so, Mod's if there is a better place for my question please feel free to move this thread. Unfortunately this is the best forum for the question I would think and the second battery will power after market lighting.
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