Average Reviews:
(More customer reviews)This charger is perfect in either single channel single battery, or dual channel separate battery mode, only charging at 10A per channel.It has linear power supply with a big-beefy transformer inside that should last for years.The LED indicators give you a basic idea of what is going on.
The problems with this charger come with using it in single battery, dual channel 20A mode.The charger supplies all 20A through one cable even though both are hooked up in parallel.The cheap yellow snap-together fuse holders get really hot when charging at 20A.Also the 14AWG wire is too small for a constant 20A draw.I cut off the cheap fuse holders and replaced them with Buss Heavy Duty ATC fuse holders and 30A fuses.That solved the hot fuse holder problem.I am planning on replacing the 14AWG wire with 12AWG also.
I bought this for charging two large storage batteries used for a battery powered emergency sump pump.Two 125AH batteries in parallel.
For the geeks out there...It actually alternates channels while supplying the full 20A.It will switch from one channel to the other every couple/few minutes.I used dual 50A current shunts to check the charger on two 125AH batteries wired in parallel.I'm guessing that Schumacher alternates channels to keep the output transistors from overheating and to distribute the thermal load.I'd really like to see a non-marine unit with a vented enclosure.
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Product Description:
This microprocessor controlled automatic charger has dual 10-amps, single 20-amps, and an N-shore dual bank onboard marine battery charger. It provides quicker and more reliable continuous true amp charging. It helps to charge both 12 and 24-volt battery systems. It charges 20-amps at 12-volts in 3-5 hours, 20-amps at 12-volts in 1.5-3 hours, and 10-amps at 24-volts in 4-6 hours. Its 10-amps charge a single 12-volt battery or two 12-volt batteries.
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