I have a can-bus compatible charger and the whole can-bus compatibility thing is highly over rated. I charge directly to the battery and it works much better. The charger doesn't have to keep opening and reopening the can-bus each time it wants to test and/or charge the battery. The Optimate does a voltage retention test every 30 minutes and the test is much more accurate when the can-bus is not part of the equation.
Save your money, can-bus compatibility is an over priced non essential hassle in my opinion.
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