DPS-i Battery Energy Storage System
Reduce cost and speed deployment of DC coupled solar plus storage
The DPS-i is a fully integrated DC coupled battery energy storage system designed to provide reliable, flexible, and cost-effective storage for central inverter-based solar power plants.
This system integrates Dynapower’s highly efficient DPS-500 DC to DC converter with Li-Ion batteries in 1, 2, 4, or 6 hour configurations. The DPS-i enables clipping and curtailment recapture of excess PV energy while reducing the balance of plant cost for system integrators. This integrated storage system is easily deployed on a concrete pad, crushed stone or on the ground with a forklift and minimal labor, reducing system installation costs.
Multiple DPS-i systems can be paralleled together to meet the sizing needs of any utility scale solar plus storage installation.
System Advantages
Qualify for tax credits
Ideal for augmentation
Highest efficiency
Increased revenue potential through value streams only available with DC-coupled systems
Lower installation and regulatory costs
Key Technologies
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Clipping Recapture
Maximize Value of PV Generated Energy
Due to high DC/AC inverter loading ratios typical with utility-scale PV, energy is lost when PV output exceeds the PV inverter peak rating, resulting in lost revenues. With DC-coupled battery storage attached to the array, the batteries can be charged with this excess PV output that would otherwise be clipped by the PV inverter. The stored energy can then be fed into the grid at the appropriate time, maximizing production and revenues from the PV generation asset. The ability to capture clipped DC output is only possible using a DC-coupled storage system.
Curtailment & Outage Recapture
Continuous Uptime and Revenue Generation
With DC-coupled energy storage, the energy storage system can operate and maintain the DC bus voltage when the PV inverter is offline for scheduled or unplanned outages, allowing energy from the array to flow to the batteries and ensuring energy can be harvested for later use. The same uptime capabilities apply when a large utility- scale array is curtailed by the ISO or utility when there is overall excess production on the grid. With a DC-coupled energy storage system, energy production can continue with energy being stored and available for discharge when curtailment ends.
Energy Time Shifting
Utilize Generated PV Energy When Its Value is Highest
Energy Storage allows bulk energy shifting of solar generation to take advantage of higher PPA rates in peak periods, or to allow utilities to address daily peak demand that falls outside periods of solar generation.
Low Voltage Harvesting
Make Money On The Edges
PV inverters typically require a minimum ‘wake up’ threshold DC bus voltage to operate, resulting in lost energy in the morning and evening or during periods of cloud coverage when voltage on the array is below the PV inverter ’wake up’ threshold. Adding DC-coupled energy storage allows for the capture of this generated energy from the margins. This capability is only available with a DC-DC converter that has voltage source capability.
Ramp Rate Control
Modulate Power for Continuous Grid Connection
Ramp rate control is often required by utilities and ISOs for PV and wind systems to mitigate the impact of a sudden injection of power onto the grid or a sudden loss of generation due to the intermittent nature of these generation sources. A storage system coupled with PV can monitor PV inverter output and inject or consume power to ensure the net output remains within the ramp requirements allowing for continuous energy injection into the grid. Additionally, with this ramp rate control benefit, energy otherwise lost when a PV inverter would self-regulate during a ramp up can be stored for later use.
System Overview
Maximum Power
- 500kW (@1000VDC)
- 600kW (@1200-1500VDC)
Max Current
- +/-500A
DC Input Voltage Range
- 100-1500VDC (Battery Port)
- 100-1500VDC (PV Port)
Battery Discharge Duration
- 1-6 hour
Features
- Advanced Operating Modes for Clipping Recapture, Curtailment Recapture and Energy Time Shifting
- Integrated Battery Overvoltage Protection
- DC Contactor and Precharge on Battery Port Included
- Integrated DC Disconnect and DC Fusing
- Fire Suppression System
- Wide DC Input Voltage Range for Battery and PV
- Parallel up to 6 DPS-i500s together for flexible building blocks
Certifications & Standards Compliance
Battery
- UL 1973
- UL 9450A
Power Conversion
- UL 1741
- UL / IEC 62109-1
- IEC / EN 61000-6-4
- IEC / EN 61000-6-2
- CISPR 11 / EN 55011
- FCC Part 15 Class A
- IEEE Std C37.90.2
Applications
- Solar Plus Storage
- Microgrids (Reverse DC-Coupling)
Product Gallery
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Downloads & Links
Want to learn more about the DPS-i energy storage system? Check out the product information below for technical specifications and other essential product information.
Let’s power up together
Take the first step toward a higher level of performance and reliability. Call us at 1 (802) 860-7200 or click the link below to schedule an appointment today.
