Phocos MPPTsolid, User Manual

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Maximum Power Point Tracker
Introduction
Power (green) and current (blue) vs. voltage from the PV array
Charge Controller
A maximum power point tracker (or MPPT) is a high efficiency DC to DC converter which
functions as an optimal electrical load for a solar array, and converts the power to a
voltage and current level which is optimum for charging batteries.
The benefits of MPPT regulators are greatest during cold weather, on cloudy or hazy days
or when the battery is deeply discharged. The MPPTsolid charge controller also monitors
battery voltage and temperature to prevent overcharging.
The charge controller can accept PV open cell voltages (Voc) up to 230 V for charging
lead acid batteries. MPPTsolid produces up to 100 A of charging current for battery
voltages between 24 and 72 V.
When charging, the MPPTsolid regulates the voltage and output current to the battery,
based on the amount of power available from the PV array, the state of charge of the
battery and the temperature of the battery bank.
Charging Lead Acid Batteries
For standard flooded lead acid batteries, vent caps should always be kept in place and
tight during both charging and discharging.
It is very important to monitor the water level in the batteries (if possible). Refill the
batteries as necessary using distilled water. If the batteries need water frequently,
recheck the charging voltage settings of the MPPTsolid and reduce if necessary.