DC-Coupled Storage

Optimized solar + storage

Ampt optimizes both PV systems and DC-coupled storage to deliver unmatched value.

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Lower Cost ESS

Use Ampt to optimize both solar array and storage equipment
Save on battery charging equipment
Save on inverter cost
Save on electrical BOS

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Higher efficiency

Higher converter efficiencies
Fewer end-to-end conversions
Higher round-trip efficiency

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Scalable

Micro-grid to utility-scale projects
Increase storage capacity without adding conversion hardware
Add PV modules or storage over time

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Flexible

Use bi-directional or standard inverters
Battery technology independent
Add storage without new grid interconnect agreement
Works with large or small storage projects
Easily interfaces with third-party energy management systems

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High DC ratios

Ampt optimizers enable inverters to accept DC ratios of 2:1 or more
Maximize energy generation
Deliver energy to battery and inverter simultaneously

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Optimized PV Array

Fewer cables and combiners saves on equipment and labor costs
2 MPPTs per string increases lifetime system performance
Improved O&M with string-level data

Lower Cost Storage Architectures with Ampt

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Direct-to-BatteryTM

Ampt’s Direct-to-Battery technology allows the optimizer, battery, and inverter to share the same DC bus without additional charging equipment dedicated to the battery.

  • Minimizes charging hardware to lower cost
  • Fewer power conversions to improve efficiency
  • Optimized PV array
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Direct-to-ConverterTM

Ampt optimizers allow the DC bus to operate at a higher fixed voltage. This increases the power density of both the charging converter and inverter to lower equipment cost per watt while increasing the solar+storage system efficiency.

  • Lower cost per watt charging converter and inverter
  • Higher efficiencies with fixed DC bus voltage
  • Optimized PV array

Direct-to-BatteryTM Detailed View

Direct to battery detail
  • EMS is the primary system controller
  • Controller sends signals to the battery, inverter, and optimizer (via the CU)
  • String Optimizer performs MPPT to deliver more energy from the array
  • The output voltage of the optimizer follows the battery bus during charge and discharge
  • The CU send commands it has received from the Controller to dynamically curtail optimizer output as determined by the EMS

Direct-to-ConverterTM Detailed View

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  • EMS is the primary system controller
  • Controller sends signals to the battery, inverter, and charging converter
  • String Optimizer performs MPPT to deliver more energy from the array
  • The optimizer enables the DC bus to operate at a fixed high voltage
  • The charging converter and inverter have a higher power density to lower cost per watt

Example Solar+Storage Applications

Utility-scale

  • Ramp rate control
  • Capacity firming
  • Recapture clipped energy
  • PV energy time shifting

Commercial Behind-the-meter

  • PV self-consumption
  • Demand charge reduction / peak shaving
  • Time-of-use energy cost management

Isolated (micro-grids)

  • Spinning reserve management
  • Step load capacity provision
  • Genset runtime optimization
  • Recapture curtailed PV energy
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Superior storage with Ampt

  • Lower total solar+storage project cost
  • Lower cost power conversion
  • Higher round-trip efficiency
  • Scalable from micro-grid to large power plants
  • Battery technology independent
  • Standard or bi-directional inverter
  • Easier and lower cost storage expansion
  • More lifetime energy with string-level MPPT
  • Up to 50% fewer combiners and cabling
  • Improved O&M with string-level data

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Find out how Ampt lowers ESS costs while improving the performance of your PV array.

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