Re: best battery charger ?
In my opinion any charger is good enough as long as it is big enough to do the job. The important thing is to monitor charger output VOLTAGE and not current. Voltage will tell you weather you are over charging or under charging the battery. If you are charging with the fan and water pump on unless the voltage is over 12.84 vdc you are not charging the battery. You are just providing current for the fan and pump. If you are pumping amps into a fully charged battery (because you forgot to shut it off) you will eventually damage the battery. The two things you need are: a timer that automatically shuts the charger off (part of a good charger) and a digital voltmeter to monitor volts at the battery. Until you know the voltage you won't know battery condition and weather your charger is big enough especially with two batteries.
Vic
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