It is not a battery it is an ultracapacitor .... world of difference, and not knowing how to handle one can get you killed. I'm not joking.
mercer transportation
Discussion in 'Mercer' started by kw12, Jul 21, 2012.
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Also as the temperature drops below 60 deg the output voltage ramps up and at 30 deg it is at 16.5 volts. Your batteries rely on a chemical reaction which slows down as temperatures decrease resulting in lower voltage and less amperage. A capacitor is just a storage device that can dump all its energy as quickly as the output circuit can absorb it. The larger the cable you have running to the starter the less voltage drop and more power that will get there. I run 4-0 and use a yellow marine grade cable to distinguish it from any other power cables. Also warn any mechanic of your starting system. If they don't understand it then either educate them or don't let them touch it. A shorted capacitor of that capacity can explode and do tremendous damage.Last edited: Dec 12, 2019
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spyder7723 Thanks this.
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#### it pete! My truck just barely started right now. Guess i need batteries.
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Rickp Thanks this.
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A capacitor can cause problem discharging, but also charging. They can charge as quickly as they discharge and are thus capable of demanding far more input current than a circuit can handle. The maxwell starting capacitors are electronically "throttled" so that from a fully discharged state it will take 30 minutes to charge. If run down to where they won't crank the truck at all it will take 15 minutes to completely recharge. They built safety constraints into them. Even a small battery is enough to fully charge these, it does not require even one truck sized battery for their charge. The truck batteries handle the load of the systems when running and as others mentioned, hotel loads without an APU running.
Drivers have told me it was stupid to spend $1k on one of them. Then after several days of sitting snowbound at home, they come out to start their trucks and need to be jumped. I turn the key and it spins like it was already warmed up on a summer day. If your batteries are so depleted that you need a jump, they will never fully charge again, it is not physically (well, chemically) possible. So many times these guys I park by not only pay for someone to come jump them, but then end up getting four batteries. I think the purchase of the Maxwell put me way ahead on that, and my last batteries lasted five full years. So in the long term, at least in my experience, it saves money and peace of mind knowing temperatures won't affect starting unless perhaps you are someplace really ridiculously cold. -
News Flash : Dana Bibbs a 30 plus year employee of Mercer Transportation was terminated from her employment. Story at 11
dwells40 Thanks this. -
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