SOUTHERN CALIFORNIA PUBLIC POWER AUTHORITY
STANDALONE ENERGY STORAGE SYSTEM SPECIFICATIONS
- FOR LADWP TRANSMISSION RELIABILITY PROJECTS
A. LADWP Objective
The requirements for proposals to this Request for Proposal (RFP) effort are as laid out in
this Appendix and the ESS Specifications Datasheet (Exhibit 1). Proposals that do not meet
the requirements will be deemed non-responsive and disqualified from further evaluation
unless otherwise stated.
1. The Seller must possess site control of the project site in the form of ownership of
the site, or a lease or license for the term of the Agreement
2. The Seller may propose one or more of the following types of contracts:
a. Non-LADWP land: Energy Service Agreement (ESA) with a purchase option
1. Expected Commercial Operations Date (COD): 2026-2033
2. To be considered, the proposed project must be able to connect to
LADWP's Power System grid. The Seller is responsible for submitting
an interconnection request through the LADWP Large Generator
Interconnection Process and provide proof of submission with the
proposal. The cost of interconnection and any associated expenses
are the sole responsibility of the Seller.
3. Proposals with a buyout option must include Long-Term Service
Agreements (LTSA) for the following services:
1. Operation & maintenance
2. Transmission service
3. Operating agent agreement(s)
b. LADWP-owned land: See Exhibit 3 for details.
B. Energy Storage System Requirements
1. The Energy Storage System (ESS) requirements provided in this Appendix shall apply
to standalone energy storage projects. For the purposes of this Appendix,
“standalone energy storage projects” refer to those not electrically paired with any
specific source of generation. Proposals for ESS paired with a renewable energy
resource are requested to be submitted to a separate RFP.
All energy for charging the ESS will be solely provided by the Buyer. The ownership
to such charging energy shall remain with the Buyer at all times and the Buyer shall
have control of such charging energy at all times. The Seller shall have custody of
such energy while it is stored by the ESS.
2. The ESS requirements in this Appendix are technology agnostic, provided that the
a. is standalone energy storage.
b. meets all of the requirements and technological specifications of this
1. As such, any requirements or specifications that cannot be met shall
be explicitly stated in the proposal.
c. shall interconnect at transmission level only (greater than 100kV).
d. shall interconnect to the LADWP grid with revenue grade metering.
3. The ESS must be integrated into LADWP as a network resource for serving load in
the LADWP’s balancing authority area.
4. The Agreement term for lithium-ion battery energy storage systems (BESS) shall be a
minimum fifteen (15) years, unless otherwise specified. The Agreement term for
other BESS and ESS shall be a minimum of twenty (20) years, unless otherwise
5. The ESS shall consist of a commercially available technology.
6. The Seller shall be an experienced project developer with at least one member of
the development team having (a) completed at least one project of similar
technology, or (b) begun construction of at least one other project similar to the
proposal being submitted.
7. The ESS shall be installed, delivered, repaired and maintained by the Seller;
however, the Buyer shall have full operational control over the ESS. The Buyer will
provide the Seller payments for services provided.
8. The Seller shall make good faith effort(s) to pursue any available Federal or State
incentives and grants which shall be reflected in the project pricing proposal.
9. The ESS shall be developed and installed in accordance with all applicable laws, best
industry practices, and pertinent standards for the applicable technology.
10. All proposals shall explicitly provide operational capabilities and operating
restrictions of the proposed technology and include all Control Modes that the ESS
is capable of performing (See Table 1 for details).
11. Proposed Projects shall have an energy density of at least approximately 1.5 kWh
per square foot.
12. The proposal must identify the ESS rated discharge duration which must be capable
of a minimum duration of four (4) hours of discharge capability at the full rating;
however, proposals for projects with longer durations, such as ten (10) hours or
more, are encouraged.
13. If the proposal includes a BESS, it shall include, at minimum, information on each of
the following elements:
a. Battery storage modules and racks
b. Power conversion and transformation equipment
c. Battery management systems
d. Equipment for communication
e. Thermal regulation
f. Environmental conditioning and safety
g. Control systems and related software
i. Incidental and related equipment
j. A statement indicating that the BESS complies with the target response
times set forth in the North American Electric Reliability Corporation
(NERC) Inverter-Based Resource Performance Guideline, as published
during the design period, based on the BESS’ proposed COD.
14. The ESS shall maintain full rated power and energy rating for the entire term of the
Agreement, pursuant to sections B.14.a to B.14.c, as applicable.
a. The Seller shall ensure that the ESS charge capacity (MW), discharge
capacity (MW), and Energy (MWh) matches the Guaranteed ESS Charge
Capacity, Guaranteed ESS Discharge Capacity, and the Guaranteed ESS
throughout the Agreement term. If the ESS charge or discharge capacity
falls below the Guaranteed values at any time, the ESS will be considered
1. Contingent on an Agreement term of fifteen (15) years or more,
Lithium-ion BESS shall maintain its energy to match the Guaranteed
ESS Energy until five (5) years before the end of the Agreement;
afterwards, the energy may degrade by up to three (3) percent of the
Guaranteed ESS Energy per year. The Seller shall provide a
degradation curve for the term of the Agreement.
2. Non-Lithium-ion ESS energy shall match the Guaranteed ESS Energy
for the entire term of the Agreement.
b. The Seller shall be subject to liquidated damages if the Guaranteed ESS
parameters, pursuant to sections B.14.a.1, B.14.a.2, and E.2 are not
maintained for the term of the Agreement.
c. Any expected degradation of the ESS shall be explicitly identified in the ESS
15. The ESS shall be capable of continuous discharge from 100% State of Charge (SOC)
to 0% SOC and continuous charge from 0% to 100% SOC at the Guaranteed charge
and discharge capacity. Pursuant to Section B.14, 100% SOC shall be equal to the
Guaranteed ESS Energy during the entire term of the Agreement.
16. The Buyer shall have the following:
a. The ability to set specific SOC and MWh values for the ESS to achieve by a
b. The ability to specify a new charge and discharge MW set point that shall
supersede existing operations/schedules for immediate execution.
c. The ability to connect, communicate, and control the ESS via LADWP
Supervisory Control and Data Acquisition (SCADA) on Distributed Network
Protocol 3 (DNP3).
17. All ESS metering shall comply with the applicable metering policies and
requirements from the LADWP Bulk Electric System Meter Policy.
18. The Seller shall be responsible for the ESS complying with applicable policies and all
requirements for the Energy Imbalance Market.
19. The ESS shall be registered with the California Independent System Operator
following the New Resource Implementation Process. The Seller shall assume such
resource will become a participating resource in the Buyer’s portfolio.
20. The ESS system is subject to the following use limitations:
a. Lithium-ion BESS shall provide a minimum of 365 equivalent cycles per
calendar year or 366, as applicable for leap years. The number of cycles for
other technologies shall be included in the proposal. Cycling during
performance tests shall not be included in the minimum cycles per year.
The Buyer will pay a fee to use additional cycles over the minimum
requirement, if available.
b. The ESS shall be capable of providing between ±0.8 power factor at the
Point of Interconnection (POI).
21. The ESS must comply with the latest version of applicable codes and standards at
the time of the detailed engineering phase, including, but not limited to the
a. IEEE Standards 1547, 1547.1, 693, 519,
b. UL Standards 9540, 9540A, 2054, 62133, 1741, 1741SA
c. NFPA Standards 855, 68, 69, 72, 70, 1
d. IFC 2018/2021
e. UN/DOT 38.3
g. ANSI C84.2006
h. IEC 62933-5-2
i. Requirements of law
j. The ESS shall be programmed in accordance to NERC Standard PRC – 024-2,
in consultation with the Buyer.
k. The Seller shall be responsible for compliance with applicable
environmental rules and regulations, including but not limited to,
hazardous material removal and dust mitigation/control measures, as will
be further defined and explained in the Agreement between the Buyer and
Seller. Specific hazardous materials shall be defined separately in the
Material Safety Datasheet (MSDS).
The Seller shall indicate any exceptions to this list and provide supporting
22. The ESS shall have Modular Energy System Architecture (MESA)-ESS communication
standards capability as well as DNP3 communication protocol capability.
23. The ESS shall establish a connection to external communications in the form of at
least: one console for the Buyer’s Energy Management System (EMS) and one
console for local control.
24. Seller shall provide LADWP with Back-up Automatic Generation Control for the ESS.
25. The Seller shall provide regular reporting of ESS status to the Buyer via SCADA
including, but not limited to the following.
a. ESS cycles available in cycles and MWh
b. Specific grid charge percentage availability for the year
c. MW and MVAR available for charge and discharge
d. MWh available for charge and discharge
e. MWh discharged year to date
f. Estimated time needed to charge from current SOC to another Operator-
g. Estimated round-trip efficiency, based on total MWh charged and
discharged per month. For clarification, this does not establish the round-