Wow, I was expecting a much better product from a name like Schumacher. Especially for such a high-dollar charger. Really disappointed.First off, the wires are permanently attached to the charger. Meaning, if you cut one too short or have to make a change later, you've only got about eight inches of wire to work with FOREVER. The wires are also super cheesy quality, with what feels like plastic insulation. Very stiff in moderately cold temperatures. The wire within looks like clad aluminum, so in other words, very cheap. Unless you can mount this thing within eight inches of your alternator and battery, or circuit panel, you're going to have to extend these short wires a considerable distance.The next annoying thing is that there's an ignition sense wire, but it isn't always honored by the charger. It's supposed to be used for "smart alternators" where the charge voltage may be low, to make sure the charger is running when the alternator is. However if the charger senses a high enough input voltage, it will go into charge mode automatically. That means you can't control the charger with a switch, relay or other signal if the voltage is high enough to cause it to decide to charge anyway. That's annoying and unnecessarily inflexible.Perhaps the biggest problem of all, is the idle current drain. On a battery at 12.4v, this thing pulls a solid 12-13mA constantly from the battery while in sleep mode. That is absolutely inexcusable, especially for something that is supposed to be for RVs, boats, and other things that get stored long-term. Leave this connected to your battery (without a charging source) and it will eat it alive. For this reason alone, I will not be using this device in my systems. For $325 (at the time of this writing), nobody should accept such terrible performance.Next up, with a healthy flooded battery attached, I connected the charger's input to a 14v supply and saw it kick into bulk charge mode and pull about 4A from the source, which is about right. Voltage across the terminals rose to over 14v and it looked pretty decent. I detached the battery mid-charge and the charger didn't seem to notice. The charge light kept blinking, no fault light. I would have expected that to trigger some error condition or at least indicate that it's no longer charging.Then I reset it and attached it to an unhealthy flooded battery that sits around 9v. The charger booted up and went right to sleep (as expected). When I plugged in the 14v source, the charger woke up and went into charging mode. It started to raise the battery voltage to about 10.5v, so I thought things were good. Then, the voltage abruptly went back to resting voltage, and the charger's LED indicated *floating* charge mode. That's totally wrong, in that (a) it should be bulk charging the heck out of the battery in that state and (b) it wasn't floating the battery, because the voltage was sagging down towards 9v. Still no fault LED.Reading the sparse "manual", I looked to the troubleshooting section, which includes a table of LEDs and their meaning. Surprisingly, the first row (which is "low input voltage" condition) says that the LED pattern is "solid alternator LED, solid battery type LED". That's literally the same light pattern as "everything is working fine"! The next row condition is "low auxiliary battery" which is what I was simulating. It says that should have a flashing "battery type" LED an a "solid red fault LED". However, I got none of those. The charger just stopped charging the battery, but indicated float charging and no fault!Needless to say, Schumacher has some work to do. I won't be using this in any of my systems, both because I can't trust that the charger would work if the battery is discharged past a certain point, because I couldn't tell that it wasn't charging from the LEDs that misrepresent the state, AND because when things were working, the idle current drain would kill my batteries and reduce my runtime.