Solar Direct Drive (SDD) System

The new solar direct drive (SDD) and weak grid power management system designed by Secop consists of the new generation SDD Power Management Module (101N3110), the new MB3CKV (109M0860) medical version of the BD Nano compressor series, and its dedicated Solar 1 (101N2742) controller.

Tailored for Vaccine Refrigerators

Secop's solar direct drive and weak grid power management system It was specifically developed for applications operating with solar panels or in unstable and weak AC grids. The new SDD Power Management Module features a wide range AC input, to allow world-wide usage and is optimized for DC for widely diffused PV panels up to 72 cells for effective installations. The PV input features a MPPT algorithm that optimizes the compressors speeds to the available sunlight to gain the most cooling from the available PV energy.

A communication interface for master controllers and data loggers gives users full control over the appliance. The module can be easily monitored with the support of Secop’s Tool4Cool® software.

The design of the new Power Management Module offers a premium robustness for reliable applications, including an IP60 housing and certified EMI enhanced robustness.

Tailored to WHO PQS Specifications

Secop collaborated with Global Health Labs on the requirements definition and development of the SDD Power Management Module. The module is tailored to the WHO PQS specifications and meets all demands for solar direct drive as well as wide range and unstable power grids along with weak installations, to enable vaccine refrigerator manufacturers to satisfy the latest voltage stabilization requirements.

The new SDD Power Management Module is the perfect choice for off-grid and weak-grid vaccine refrigerators, solar off-grid coolers and freezers, and ice bank refrigerators.

  • The new SDD Power Management Module solution is tailored to the WHO PQS specifications
  • The SDD Power Management Module enables vaccine refrigerator manufacturers to satisfy the latest E007/VS0 1.6 voltage stabilization requirements and fulfills already necessary protection and control features
  • Easy replicability between systems – PV panels and AC installation fit all PQS applications

  • Flexible Connections

    Fridges can be used with either DC or AC power supply to allow world-wide usage

  • WHO PQS Specifications

    Meets all demands for SDD as well as for wide range and unstable power grids

  • Easier Maintenance

    Simple connections, standard PV panels, and easy replicability between systems

Features in Detail

  • AC/DC solution optimized for photovoltaic solar panel supply and weak AC grid installations
  • Increased maximum PV voltage to 55 V to enable the use of popular PV modules
  • Power input management and peak power point tracking to ensure efficient and optimal use of PV energy
  • Enhanced communication interface for operation and monitoring
  • AC wide working range between 85 V and 264 V
  • Additional 24 V DC output suitable for data loggers, monitoring devices, USB chargers, and external auxiliaries  
  • Designed for premium robustness and reliability: IP60 housing and robust against EMI
  • Designed in combination with the new MB3CKV version of the BD Nano premium series compressor:
    premium cooling performance with the best efficiency
  • Tailored to WHO PQS requirements and monitoring systems

Solar Direct Drive (SDD) Power Management Module

  • PV Direct Input

    • Optimized input range from 30–55 V to support up to latest generation of 72 cell PV panels
    • MPPT compressor speed control to ensure best cooling performances
    • Reduced compressor start energy for early morning and cloudy weather starts
    • WHO PQS EMS family standards compliant:
      E006/DL01 (data logger device)
      E007/DS01 (data standard)

  • Wide Range AC Input

    • Wide range input – working from 82 V to 274 V AC and 40 Hz up to 65 Hz. Protected up to 510 V AC (none-working).
    • No need for voltage stabilizer – reduced complexity and cost.
    • Capable to deliver up to 110 W constantly – independent from input voltage.
    • Lower power consumption compared to previous BD-P solutions – due to increased COP therefore less operating time.
    • Lower starting power – enables operating in grid networks with limited power supply.

Possible Project Savings for System Integrators

  • Integrated protection against dangerous and variable AC conditions known to permanently damage equipment
  • Common compressor for AC and solar applications resulting in fewer components and cabinet configurations
  • Significant reduction of project times and time to market
  • Integrated data output compliant to WHO monitoring requirement
  • Improved efficiency in variable solar conditions reduce the required solar panel capacity

Technical Literature

  • Solar Direct Drive and Weak Grid Power Management System

    Solar Direct Drive and Weak Grid Power Management System

    | Literature | Quick References

    Download (2.25 MB)
  • BD Nano-Series, R600a, R1234yf, R134a, 12-24 V DC

    BD Nano-Series, R600a, R1234yf, R134a, 12-24 V DC

    | Literature | Leaflets

    Download (941.82 KB)