Response to RFIs Set 2_Microgrid_0603206.pdf

RFI Number Question USACE Response

Please confirm that the Preaward Survey is not required at the time of proposal submittal, as stated on page 45 of the RFP, and, relatedly, please clarify that Tab 6 of Volume II should only include a statement from the

Offeror. Further, please clarify if such a statement can include the experience and past performance of the contractor team, not just that of the Offeror.

Preaward Survey is not required at time of proposal submittal. Tab 6 of Volume II should only include a statement from the offeror. Information in the statement must be in regard to the offeror. See FAR Part 9.

Section 2.1.16.1 requires submitting a "finalized utility interconnection agreement," and §1.6.1.1 requires a phasing plan prepared in collaboration with PG&E. Please confirm whether the contractor is responsible for negotiating and executing the PG&E interconnection agreement, or whether USACE/the installation will provide an existing agreement.

Will the Government furnish the PG&E utility data (available fault currents, Thevenin equivalent) needed for the power system studies (§2.1.16.1.o–q; §26 05 73)?

The new interconnection agreement will be between the Government (Army Reserve) and PG&E.

The Contractor is required to support finalization of interconnection agreement per actual equipment, final testing, and commissioning of equipment to be witnessed by PG&E.

During construction, the Contractor is responsible for all coordination with PG&E leading to a finalized interconnection agreement (spec 26 37 13, par 2.1.16).

Coordination includes, but not limited to, submitting applications and documents on behalf of the Government

(see ES101 for details).

Gather PG&E utility data during coordination with PG&E and contact Contracting Officer Representative (COR) for governement related info after contract award.

Section 2.3.13.4 states internet connections are forbidden on DoD microgrids (consistent with the Closed

Restricted Network), while §2.1.4.3.8 requires renewable energy forecasting. Please confirm whether on-site/persistence-based forecasting satisfies this requirement.

This is an acceptable solution but must follow MIL-STD-3071 for implementation.

The spec references integration with a UMCS for HVAC/energy management (§2.1.4.5.1, §2.1.9.1) and notifications transmitted to a JACE (§2.1.3.12). Please confirm whether an existing installation UMCS (e.g., Niagara/JACE) is present that the MCS must integrate with — including the protocol and point of connection — or whether no UMCS exists and the MCS is to perform those functions per §1.1.1.i.

The Niagra/ JACE is present on the project site. See ES404 and detail A1 on sheet EI600 and EI601.

For the MIL-STD-3071 (Tactical Microgrid Standard) requirement on core control/status traffic: please confirm the acceptable conformance-verification method — e.g., the U.S. Army C5ISR TMS Topic Monitor / Simulator /

Compliance Checker vs. independent third-party certification — and the applicable MIL-STD-3071 revision.

The U.S. Army C5ISR TMS Topic Monitor / Simulator / Compliance Checker is an acceptable conformance verification method. However, the government may use a third party to perform conformance verification.

Please confirm that the system sizing specified in the solicitation (759 kW PV solar, 750 kWh BESS, and 800 kWh diesel generation with 10,000-gallon fuel tank) was already calculated to support the 14-day energy resilience requirement. If not, please provide load data for the installation so that sizing may be calculated/confirmed.

Power, energy storage capacity, and tank capacity were calculated to support 14-day energy resilence requirement.

26 31 00 2.2.3 lists PV modules to be not less than 400 watts. Is the goal of the project to fill the space shown, meet a minimum DC kW system (760kW DC / 632.7kW AC in 2.1.1) or match the layout one for one (1,900 modules) with current commercially available wattages (435-450+)?

Intent is to match the system requirements in 26 31 00 par 2.1.1.

23 Will solar data system have an internet connection provided? An internet connection is not allowed per MIL-STD-3071 and specification 26 37 13 section 2.3.13.4.

For 26 31 00 Section 2.3 is there a preference for inverter type as both string and micro have listed specifications ?

System was designed using string inverters compliant with PG&E interconnection requirements. Inverters used must be on PG&E approved lists.

Please advise on the status of the tie breaker in different modes of operation. This is not clearly defined in the sequence of operation on E-001.

Tie breaker to remain closed under standard operation. Tie breaker will be opened under specific circumstances such as maintenance or failure of a single bus.

Please confirm that BESS is a total rating of 1000 kW / 750 kWh (qty 2 500 kW BESS inverters). There BESS rating shown is conflicting across different documents.

This RFI did not indicate where the apparent conflicts are in the contract documents. BESS minimum requirements are 500kW/750kWh per DD1391 and specification 26 33 57. Exact inverter size, quantity, and configuration vary by manufacturer which meets the minimum requirements.

Is there an existing SCADA system that the MCS needs to communicate with? If so, please provide more information on this system and more details on the communication requirements.

Yes, it is connected to MCS through Tridium Niagara JACE controller in existing HQ building. Refer to I/O list on

EI700 series sheets.

Please provide more details on the existing JACE controller shown on EI601 & please share the technical design guide EBCS, 2025.06 (per keynote 1 on EI601).

See the Army Reserve EBCS Technical Guide - 2025 June available for download here:

https://www.lrd.usace.army.mil/missions/military-construction-reserve/design-guides/

26 37 13 Section 2.1.4.5.1 - UMCS is mentioned as a system that MCS will have external connections with, however, no UMCS is mentioned in the network diagram on EI601. Is there an existing UMCS in this project? If so, please advise details of this existing system and what the connection requirements are.

See response to Question 29 and 30.

Are T-GEN1 and T-GEN2 included with their respective generators, GEN 1 and GEN 2? On E-600, it appears that T-GEN1 comes with GEN 1, but this does not appear to be the case for T-GEN2 and GEN 2.

Step up generators T-GEN1 and T-GEN2 are not integrated with their respective generators. Refer to sheets

EG401 and ES401.

35 Specification 26 37 13 Section 1.12.1.b – please confirm if HIL Testing is required for this project.

Section 26 37 13 par 1.12.1.b does not exist.

Hardware In The Loop (HIL) Testing is required. See section 26 37 13 par 1.15.2, par 3.4, and elsewhere for requirements in detail.

26 31 00 2.2.3 lists PV modules to be not less than 400 watts. Is the goal of the project to fill the space shown, meet a minimum DC kW system (760kW DC / 632.7kW AC in 2.1.1) or match the layout one for one (1,900 modules) with current commercially available wattages (435-450+)?

Intent is to match the system requirements in 26 31 00 2.1.1. and DD1391 requirements.

56 What is the anticipated timeline from proposal submission to bid award/rejection? 60 days.

With funds not presently available for this project, if awarded, how long will the bid guarantee (e.g., bid bond) be held by the Army prior to contract execution? How long must project pricing be held, if awarded?

1) The bid bond will be held by USACE for 60 days. 2) As stated in block 13d of the SF1442, proposals must provide 60 calendar days after the date offers are due for government acceptance.

58 What are the criteria to be met for funds to become available? The contract will not be awarded without funds being available prior to award.

ERCIP MICROGRID Request for Information and Responses

RFIs Set #2 - 7/1/2026

59 When are funds expected to be available for this project? The contract will not be awarded without funds being available prior to award.

Would USACE be able to provide bidders with a copy of the existing PGE Interconnection Agreement? (Section

01 11 00, page 2) There is no existing Interconnection Agreement. See response to Question 11.

64 What is the Applicability of UFC 3-550-04 in the design phases? Compliance with UFC 3-550-04 Change 1 was required in the design phase.

Cyber/IA (Div 25 05 11.03) The Project Specification indicates a controller and smart switches are to be integrated. What type of controller and smart switches?

Refer to UFGS SECTION 26 37 13 Microgrid Control System.

Commissioning Process (Section 5)

The Project Specification indicates the CxD to prepare Design Phase Commissioning Plan. What is the

Applicability of UFC 3-550-04 in the commissioning phases? (Appendix D - Design Phase Commissioning Plan)

The design complies with UFC-550-04 Change 1.

The construction contractor (spec section 01 91 00.16 par 1.6.2) is responsible to develop the Construction

Phase Commissioning Plan based on components selected for the microgrid (01 91 00.16 par 1.1).

See 01 91 00.16 for Contractor's Commissioning Team and commissioning requirements in detail.

Will all permitting approvals be performed by USACE, or will there be permits that need to be pulled with the city or state?

Construction permits required by city/ state shall be performed by Contractor (01 57 19, par 1.8). Contractor will be responsible for permitting requirements listed in the contract documents. Coordinate with USACE for construction activities on installation.

The requirements ask for a 1MW/750KWh BESS which is not a standard BESS size. Please confirm that a larger energy storage BESS instead that meets the power requirements can be used instead.

The correct configuration BESS system 2 each 500 kW inverters with 375 kwh of battery each (standard offering from the vendor). This meets 1391 minimum requirement 750kW with one hour run time. See spec section 26 33 57 for detail requirements.

78 The existing JACE seems to be fully utilized. Can contractor furnish their own JACE?

No. Develop price proposal assuming the JACE is present and available as described in the design documents

(EI-600).

BESS:

a. What is the fault current contribution specification during isolation / outage? 2 pu (per unit of rated current)?

b. The specification states 500 kW / 750 kwh as the BESS standard, but the drawings and the specified BESS system have 2 each 500 kW inverters with 375 kwh of battery each. What is the correct configuration?"

a) 1.1 to 1.25 PU based on manufacturer information provided for inverter EPC PD500.

b) The correct configuration BESS system is 2 each 500 kW inverters, each inverter with 375 kWh of battery

(based on standard offerings). See E-625. This meets 1391 minimum BESS system requirement of 750kWh with one hour run time.

26 31 00 2.2.3 lists PV modules to be not less than 400 watts. Is the goal of the project to fill the space shown, meet a minimum DC kW system (760kW DC / 632.7kW AC in 2.1.1) or match the layout one for one (1,900 modules) with current commercially available wattages (435-450+)?

See response to Question 53.

150 Will solar data system have an internet connection provided? See response to Question 23.

For 26 31 00 Section 2.3 is there a preference for inverter type as both string and micro have listed specifications ?

See response to Question 24.

Can historical electrical usage information for the campus be provided to support PV, BESS, generator, and fuel-use modeling?

• Including: utility interval data, monthly utility bills, peak demand, and daily energy consumption.

If available from USAR, this may be provided after contract award. Coordinate with the COR after award.

166 Electrical: Has interconnection process been completed and has PG&E approved proposed oneline?

The designer has coordinated with PG&E on applications for the new interconnection agreement and the new electric service during design phase. During construction, the construction contractor be responsible for coordination with PG&E. See response to Question 11.

The requested BESS configuration is atypical. Can you help us understand the BESS’s expected results as configured & integrated within the microgrid?Would you be willing to entertain a more traditional/commercially available BESS configuration (i.e., 1MW/2MWh or 1MW/4MWh)?

a) For BESS system and operation description, see 26 33 57 (par 2.1), sheet E-001 ,and elsewhere.

b) Variations from contract requirements will be considered where advantageous to the Government after award. See proposal instructions in 01 33 00, par 1.8.