GEESYS MPPT solar controller with Microcontroller technology is an advanced maximum power point
tracking (MPPT) battery charger for off-grid photovoltaic(PV) systems. The controller features
a smart tracking algorithm that maximizes the energy harvest from the PV and also provides load
control to prevent over discharge of the battery.
The GEESYS MPPT is well suited for both professional and consumer PV applications including
automatic lighting control. Its charging process has been optimized for long battery life and
improved system performance. This product is epoxy encapsulated for environmental protection,
may be adjusted by the user via four settings switches or connection to a personal computer,
and has an optional remote meter and battery temperature sensor.
The function of a MPPT is analogous to the transmission in a car. When the transmission is in the wrong gear,
the wheels do not receive maximum power. That's because the engine is running either slower or faster than its
ideal speed range. The purpose of the transmission is to couple the engine to the
wheels, in a way that lets the engine run in a favorable speed range in spite of
varying acceleration and terrain
Let's compare a PV module to a car engine. Its voltage is analogous to engine speed.
Its ideal voltage is that at which it can put out maximum power. This is called its
maximum power point. (It's also called peak power voltage, abbreviated Vpp).
Vpp varies with sunlight intensity and with solar cell temperature. The voltage of
the battery is analogous to the speed of the car's wheels. It varies with battery
state of charge, and with the loads on the system (any appliances and lights that
may be on). For a 12V system, it varies from about 11 to 14.5V.
In order to charge a battery (increase its voltage), the PV module must apply a voltage
that is higher than that of the battery. If the PV module's Vpp is just slightly below
the battery voltage, then the current drops nearly to zero (like an engine turning slower
than the wheels). So, to play it safe, typical PV modules are made with a Vpp of around 17V
when measured at a cell temperature of 25'C. They do that because it will drop to around 15V
on a very hot day. However, on a very cold day, it can rise to 18V!
Main Functional Features of Solar Charge Controllers:
MPPT controllers offer a potential increase in charging efficiency up to 30% (Maximizes energy harvest)
These controllers also offer the potential ability to have an array with higher input voltage than the battery bank
You can get sizes up to 80 Amps
MPPT controller warranties are typically longer than PWM units
MPPT offer great flexibility for system growth
longer Battery life
extensive electronic Protections
Fully adjustable and highly reliable
MCU based buck converter 12/24Volt 20/40A.
MPPT Technology, efficiency improved by more than 20%.
First in its class LCD with Power and Energy measurement.
Menu settable configuration using 2x16 LCD and 3 push buttons.
Menu settable Battery voltage, battery current , Float voltage and Float current.
Three stage Charging.
Over voltage/Over current protection.
Optional relays to control Mains charger and Inverter.
lower System Cost
GEESYS - M122448
12V; 24V; 48V;
Own Power Consumption
Rated Charging Current
10A; 20A; 30A; 40A; 50A; 60A;
Rated Load Current
10A; 20A; 30A; 40A; 50A; 60A;
Voltage Drop of Charge Circuit
Voltage Drop of Load Circuit
Equalization Charge Voltage
(Used only when battery is deep discharged)
Buck Charge Voltage
Float Charge Voltage
-20'C ~ +55'C
Dimensions L x B x H
RV, boat, and off-the-grid home battery storage systems
DC Home Lighting System
AC Home Lighting System
GEESYS Technologies (India) Private Limited — Expert in General Electrical and Electronics System