Charge Controllers - New England Solar

32 Call Toll Free: (800) 914-4131 New England Solar Electric, CONTROLLERSC harge controller BasicsSolar modules produceelectricity when the sunshines. The Charge con-troller regulates the flow ofelectricity from the solarmodules to the batterybank. When the batterybank is low, the Charge con-troller feeds all of the elec-tricity from the array to thebatteries. When the batter-ies reach a state of fullcharge, the Charge con-troller stops or redirectsthe supply of electricity toprevent Charge controllershave the ability to hold thebattery bank in a "float"state of Charge if the bankis not being used. At nightthe Charge controller pre-vents a reverse flow of cur-rent from the batteries tothe are three basictypes of Charge Controllers -series, shunt and pulse-width-modulated. A seriescontroller, the most basictype, acts as a switch to dis-connect and re-connect thesolar modules to the bat-tery bank. A shunt type con-troller redirects the currentfrom the Solar modules -either by simply short-cir-cuiting the array or bydirecting the current tosome other load.

34 Call Toll Free: (800) 914-4131 New England Solar Electric, Inc. MPPT CHARGE CONTROLLERS Maximum Power Point Tracking Many people have asked about power point tracking and whether it has any real

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