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Market Research Report
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785934

Solar-plus-storage System Architectures: Design, Pricing and Economics in the US

Published: | Wood Mackenzie - Power & Renewables | Delivery time: 1-2 business days

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Solar-plus-storage System Architectures: Design, Pricing and Economics in the US
Published: January 29, 2019
Wood Mackenzie - Power & Renewables
Delivery time: 1-2 business days
  • Description
  • Table of Contents

Over the coming years solar-plus-storage will take off as one of the most common applications of energy storage in the US. By 2023, more than 50% of annual storage deployments in the US are expected to be paired with solar. As system design evolves, choice of architecture will become an important consideration when developing solar-plus-storage projects.

In this report we compare the system economics of front-of-the-meter AC-coupled and DC-coupled solar-plus-storage systems and identify key attributes that will drive each of these architectures in both front-of-the-meter and behind-the-meter markets in the future. Our Power & Renewables reports and data provide deep insight into the current and future state of electricity generation.

Table of Contents

  • 1. Executive Summary
  • 2. Introduction
  • 3. Solar-plus-storage system architectures
  • 4. Drivers for solar-plus-storage
  • 5. Solar-plus-storage system economics model
  • 6. System economics for AC-versus DC-coupled solar-plus-storage
  • 7. Future of solar-plus-storage system design and architectures
  • 8. Conclusion

List of Figures

  • Annual storage deployments forecast (MW)
  • Annual solar deployments forecast (MW)
  • Annual solar-plus-storage forecast by segment (MW)
  • Recent solar-plus-storage PPA prices 2017-2019 ($/MWh)
  • AC-coupled solar-plus-storage system design
  • DC-coupled solar-plus-storage system design
  • DC-coupled solar-plus-storage system design with multi-port hybrid inverter
  • Solar-plus-storage value stack
  • Vendors launching products for FTM DC-coupling
  • System integrators driving DC-coupling in the FTM solar-plus-storage market
  • Cost-saving opportunities in a new solar-plus-storage system
  • Cost of storage inverters, 2018E-2023E ($/kW)
  • Input PPA assumptions
  • PV system assumptions and financing parameters
  • Solar-plus-storage system assumptions
  • Average day DC solar output profile at different ILRs (MWh)
  • YOY solar and storage system price declines, 2019E-2023E (%)
  • System cost comparison for new solar-plus-storage systems, 100 MW solar paired with 30MW/120MWh storage, 2018 ($)
  • Capex costs for 20 MW solar paired with 10 MW/40 MWh storage system ($, millions)
  • Capex costs for 100 MW solar paired with 30 MW/120 MWh storage system ($, millions)
  • Capex cost stack for AC-versus DC-coupled solar-plus-storage, 100 MW solar paired with 30 MW/120 MWh storage, ILR of 1.3 (%)
  • Revenues and costs for 100 MW solar paired with 30 MW/120 MWh storage system, ILR of 1.3 ($)
  • IRRs for AC-versus DC-coupled 100 MW solar paired with 30 MW/120 MWh storage systems at different ILRs (%)
  • LCOE sensitivity for AC-coupled solar-plus-storage at different ILRs ($/MWh)
  • LCOE sensitivity for DC-coupled solar-plus-storage at different ILRs ($/MWh)
  • Capex cost stack for AC-versus DC-coupled 20 MW solar paired with 10 MW/40 MWh storage at ILR of 1.3 (%)
  • Revenues and costs for 20 MW solar paired with 10 MW/40 MWh storage system at ILR of 1.3 ($)
  • IRRs for AC-versus DC-coupled 20 MW solar paired with 10 MW/40 MWh storage systems at different ILRs (%)
  • Solar-plus-storage use-case application by system design
  • IRRs for DC-coupled solar-plus-storage systems at different ILRs for projects installed in 2022 (%)
  • Storage-only BOS cost stack for different duration systems (%)
  • DC-coupled solar-plus-storage alternate system design
  • BTM AC versus DC coupling
  • Comparative analysis of advantages and disadvantages of AC versus DC coupling