Battery Charging Stages
Controller has a three-stage charging separately: fast charging, maintenance charging and floating charging. Through the fast, efficient and safe battery charging mode, the system can effectively extend the battery life.
A) Fast charging
Fast charging battery voltage has not reached full voltage value (i.e.balance/boosting voltage), controller MPPT charging will provide maximum solar power to charge battery. When the battery voltage reaches a preset value, there will be a maintenance charging.
B) Maintenance charging
When the battery voltage value is reached, the controller will conduct on constant voltage charging, this process will no longer be MPPT charging and the charging current also gradually declining as time goes by. Maintenance charge default duration is 0.5h, when the time reaches the set value, the system will be transferred to the floating charging..
C) Floating charge
After constant charging phase, the controller through reducing the charging current in order to reduce the battery voltage, and keeping the battery voltage in floating charge voltage set point. During float charging stage, battery charging is very weak, ensure the batteries are full charged. In the float charging stage, loads can get nearly all of the solar power. If the loads exceed solar power, the controller will not be able to maintain float charging stage. When the battery voltage is low and then recover back to charging set value, the system will exit float charging stage, re-entering the fast charging stage.
_ MPPT charging mode, peak efficiency up to 99%,saving 30%~60% solar panel than traditional PWM controller.
_ DC12V/24V/48V battery system automatic recognition,users can use it in different system conveniently.
_ Maximum PV input voltage up to DC100V.
_ Three stages charge: fast charge(MPPT),constant voltage charge,floating charge, It can protect batteries well.
_ Three option of discharge: on mode and off mode and PV voltage(solar) control mode.
_ Users can choose 4 kinds of commonly standard batteries(Sealed lead acid, Vented, Gel, NiCd). Other kinds of batteries can be defined by users.
_ Digital tube can display battery voltage and charging current. The software can display various parameters such as model number, PV input voltage, battery type, battery voltage, charging current, charging power, working condition.
_ RS232 communication, we can offer communication protocol also, it’s convenient for user’s integration management.
_ This controller can be paralleled infinitely.
_ CE and RoHS Certifications are approved. We can help clients to approve other certifications.
|Model||BK-MPPT-48V 50A||BK-MPPT-48V 100A||BK-MPPT-192V 50A||BK-MPPT-192V 100A||BK-MPPT-384V 50A||BK-MPPT-384V 100A|
|Rated system voltage||48VDC||192VDC||384VDC|
|Rated charging current||50A||100A||50A||100A||50A||100A|
|PV open circuit voltage input range||75V~155V||300V~400V||580V~800V|
|max power point voltage range||60V~124V||60V~124V||240V~320V||240V~320V||464V~640V||464V~640V|
|Recommend PV open circuit Voltage||115V±10V||343V±10V||650V±10V|
|Temperature compensation algorithm||-2mV/℃/2V|
|ambient working temperature range||-25℃～+45℃|
|Storage temp. Range||-35℃～+80℃|
|Altitude||≤5500m（2000m above the need to reduce power use）|
|relative humidity||≤95%，no condensation|
|mounting hole size||158*230||158*330||370*330||370*330||370*330||370*330|
|Installation hole radius||M5||M5||M6||M6||M6||M6|