Skip to content

Storage architectures matched to your project

NAPCO materials describe DC-coupled industrial concepts and AC-coupled retrofits for existing solar plants.

Use cases

  • Peak shaving

    Store energy at the right time and use it at peak demand to manage the power drawn from the grid. Savings depend on the tariff and the load profile.

    Suited products

  • Solar self-consumption

    Use solar generation at other hours than when it is produced, within the battery capacity and the energy-management strategy.

    Suited products

  • Backup for critical loads

    Storage and switching designed to keep defined loads supplied. Backup duration depends on the load power and the actual usable capacity.

    Suited products

  • Microgrids and multi-source coordination

    Coordinated control of solar, grid, battery and, where needed, a diesel generator, designed around the needs of the project.

    Suited products

  • Retrofit storage for existing PV

    An independent storage branch added on the AC side of an existing plant, after the connection and protection have been checked for compatibility.

    Suited products

  • Energy time shifting

    Energy stored during generation or purchase periods and discharged in a controlled way when it is needed. The economics depend on operating conditions.

    Suited products

Conceptual architectures

Reference architecture

Residential and small-commercial all-in-one

Battery, solar input and grid supply connect to one integrated unit that powers the loads and provides backup.

Solar PVGridHUDI all-in-one (battery+ inverter)Load
  • Solar PV
  • Grid
  • HUDI all-in-one (battery + inverter)
  • Load

Suited products:HUDI Series

Reference architecture

DC-coupled architecture for smaller industrial loads

Solar panels connect to a DC bus through MPPT. The battery sits on the DC side, and the PCS manages power for the AC load or grid.

PV ArrayDC/DC MPPTDC BusBatteryPCS DC/AC400V Load/GridEMS950 V DC*400 V AC*
  • PV Array
  • DC/DC MPPT
  • DC Bus
  • Battery
  • PCS DC/AC
  • 400V Load/Grid
  • EMS

* 950V DC and 400V AC appear in this design example, not as fixed product specifications.

Suited products:JUPAR SeriesHEZAR Series

Reference architecture

AC-coupled retrofit for existing solar plants

Storage with its own PCS connects as an independent branch on the AC side of the existing solar plant's bus or grid connection.

Existing PV + inverterPlant AC busBESS batteryBESS PCSMetering / protectionEMS / Grid
  • Existing PV + inverter
  • Plant AC bus
  • BESS battery
  • BESS PCS
  • Metering / protection
  • EMS / Grid

Suited products:JUPAR SeriesHEZAR Series

Reference architecture

Commercial-industrial hybrid BESS architecture

In the reference architecture, PV, generator, grid and load are monitored and managed by the PCS and EMS.

Solar PVDiesel generatorGridLoadBESS cabinetMeterEMSMonitoring
  • Solar PV
  • Diesel generator
  • Grid
  • Load
  • BESS cabinet
  • Meter
  • EMS
  • Monitoring

Suited products:JUPAR Series