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Get a 30% power gain with an MPPT charge Controller! These controllers use a technology known as Maximum Power Point Tracking (MPPT). MPPT is the electronic power tracking of the optimal electrical load usually generated by a solar panel. An MPPT controller looks at the power output of the solar panel, and compares it to a battery voltage, electric motor or pump requirement. Using this information the controller then converts the power to the ideal current level for whatever the load was designed to drive.
Most MPPT charge controllers have an efficiency rating of 92-95%, but your power gain changes seasonally. You will typically experience a 20 to 45% power gain in winter and 10-15% in summer.