Charge Controller 70A with Bluetooth

In case of partial shading, there may be two or more maximum power points (MPP) on the current-voltage curve. Conventional MPPTs tend to adapt to a local MPP. However, this may not be the optimal MPP. The innovative algorithm of the BlueSolar device will always maximize energy yield by adapting to the optimal MPP.

No cooling fan. Maximum efficiency over 98%. Full discharge current up to 40°C (104°F).

Eight pre-programmed algorithms (Lead Acid, AGM, GEL, LiFePO4 etc., see manual for additional information).

The BlueSolar MPPT charge controller is configured for a three-stage charging process: Constant Current - Constant Voltage - Constant

Voltage Charging Constant Current Phase During this phase, the controller delivers as much charging current as possible to quickly charge the batteries. Constant Voltage Phase When the battery voltage reaches the constant voltage setting, the controller switches to constant voltage mode. 

If only weak discharges occur, the constant voltage time is shortened to prevent overcharging the battery. After a deep discharge, the constant voltage phase is automatically extended to ensure the battery is fully charged. 

The constant voltage phase ends as soon as the charging current drops below 2A. Trickle Charging During this phase, the trickle charge voltage is applied to the battery to keep it fully charged.

• Overheat protection and high temperature load reduction.
• Solar system short circuit protection and reverse polarity protection.
• solar system reverse current protection.

The internal temperature sensor regulates the constant and float charging voltages based on the ambient temperature.

LED indicators:

• Constant Current Blue LED: Lights up when battery is connected. Turns off when constant voltage is reached.
• Constant Voltage Blue LED: Turns on when constant voltage is reached. Turns off when the end of the constant voltage phase is reached.
• Blue Maintenance LED: Lights up when the solar charger has switched to maintenance charging.

Multiple BlueSolar MPPT charge controllers can be connected to a battery bank to increase the charging current.

• Battery voltage: automatic selection 12V, 24V, 48V, manual selection 36V via software
• Maximum power of solar module with 12V battery system (1): 1000 W 
• Maximum output of solar module with 24V battery system (1): 2000W 
• Maximum output of solar module with 36V battery system (1): 3000W 
• Maximum power of solar module with 48V battery system (1): 4000W 
• Maximum PV open circuit voltage: 250V DC
• Rated charging current: 35A
• Max. Short circuit current of solar system(2): 40A
• Max. Efficiency: 99%
• Own consumption: 10mA
• 'Constant' charging voltage: 14.4V / 28.8V / 57.6V (default)
• Maintenance charge voltage: 13.8V / 27.6V / 55.2V (default)
• Loading algorithm: multi-stage, adaptive
• Temperature compensation: -16mV/°C or -32mV/°C
• Protection functions: battery reverse polarity (fuse), output short circuit, overheating
• Operating temperature: -30 to +60°C (maximum rated power up to 40°C)
• Humidity: 95%, non-condensing
• Data communication port: VE.
• Colour: blue (RAL 5012)
• Terminals: 14mm² / AWG16
• Protection class: IP43 (electronic components), IP22 (connection area)
• Weight without packaging: 1.25 kg
• Dimensions (HxWxD): 185 x 250 x 95 mm

1) Solar system voltage must exceed Vbat + 5V for the controller to start. After that, the

minimum solar system voltage at Vbat is + 1V.

2) Higher short circuit current may damage the controller if the PV system is reversely connected.