United States Department of the Interior

NATIONAL PARK SERVICE

Golden Gate National Recreation Area

Building 201, Fort Mason San Francisco, CA 94123-0022

PROJECT SPECIFICATIONS

Stinson Beach PV System Upgrade

PMIS - 326555

July, 2026

DIVISION 01 — GENERAL REQUIREMENTS

01 11 00 — Summary of Work

The work consists of the following:

BASE: REPLACE INVERTER

1. Remove the Existing PV inverter and associates

2. Furnish and install a new inverter that:

a. Meets PG&E Greenbook specifications.

b. Is certified under California Rule 21 for grid interconnection.

c. Is compatible with the existing PV array optimizers and electrical infrastructure.

3. Provide all tools, materials, and equipment necessary for the complete installation.

4. Ensure the new inverter is UL listed and includes integrated safety disconnects as required.

5. Coordinate with NPS for required inspections.

6. Perform all necessary testing and commissioning to verify proper operation.

7. Provide operation manuals and monitoring/management system information

8. Pair and map all P400 optimizers with the newly installed inverter.

9. Validate module‑level communication, string voltages, current, and overall system functionality

10. Perform and document Rapid Shutdown functional testing per NEC 690.12.

11. Must include monitoring compatible with NPS systems or provide a standalone monitoring solution.

12. All work must comply with NEC, NESC, and local codes

13. Contractor must ensure minimal disruption to park operations during installation.

14. Furnish a 10-year warranty on parts and labor

OPTION ITEM 1: REPLACE OPTIMZERS

1. Remove and replace the 31 existing PV optimizers

2. Furnish and install a new panel Optimizers that:

a. Meets PG&E Greenbook specifications.

b. Is certified under California Rule 21 for grid interconnection.

c. Is compatible with the existing PV installed inverter and electrical infrastructure.

3. Perform all necessary testing and commissioning to verify proper operation.

4. Pair and map all installed P400 optimizers with the newly installed inverter.

Contractor will be responsible for removal and proper disposal of all old equipment. Any gaskets, adhesives, lubricants, or incidental parts will be furnished by the contractor

1. Project Location: Stinson Beach Lift Station, located at 45 Willow Camp Way, Stinson Beach, 94970, Marin County, California.

01 33 23 — Submittal Procedures

Provide submittals via E-mail: product data, shop drawings, installation manual, UL/NRTL certificates, commissioning test forms, labeling samples, O&M manuals, training agenda.

01 35 23 — Safety Requirements

SUBMITTALS

A Site Specific Safety Plan will be submitted after award, please refer to clause H.3 under Special Contract Requirements.

01 35 30 — Hazardous Material

If any suspect contamination or hazardous waste arises during conduit/cable work, follow Summary of Work, sampling, disposal manifests, and reporting.

DIVISION 26 — ELECTRICAL

SECTION 26 32 50 — Photovoltaic Inverter Replacement

PART 1 — GENERAL

1.1 Summary

• Provide turnkey removal of existing inverter and installation of SolarEdge Home Hub USE7600HUSMNBE78 at the Stinson Beach Lift Station PV system, including accessories, communications, metering, labeling, commissioning, training, and integration with existing SolarEdge optimizers and AC/DC distribution.

1.2 References

• SolarEdge Home Hub Single Phase (North America) datasheets for SE7600H/USE7600H family (AC ratings, NEMA 4X, AFCI/RSD, metering).

• UL 1741:2021 Ed.3 Supplement SB—smart inverter conformance to IEEE 15472018/1547.12020 (Intertek VOC reference).

• NEC Article 690.11/690.12 (2017–2023)—arc-fault and rapid shutdown requirements (array boundary, ≤30 V outside, ≤80 V inside within 30 s).

1.3 Submittals

• Product Data: OEM datasheet for USE7600HUSMNBE78 and installation manual; UL/NRTL listing evidence showing UL 1741SB certification and IEEE 1547 capability; AFCI/RSD features; communications and metering.

• Shop Drawings: Mounting details, conduit routing, terminations, clearances, corrosion control; updated single line diagram reflecting inverter replacement and rapid shutdown placards.

• Commissioning Plan & Reports: Test procedures and forms (functional, RSD timing/voltages, IEEE 1547 function screenshots/logs).

• O&M Manual & Warranty Certificates: Minimum 12year inverter warranty per OEM.

1.4 Quality Assurance

Equipment listings: UL 1741SB; IEEE 1547 functions supported; AFCI/RSD integrated.

PART 2 — PRODUCTS

2.1 Inverter

• Model: SolarEdge Home Hub

• Electrical Ratings (OnGrid):

o Max AC Power Output: 7,600 W @ 240 Vac (6,600 W @ 208 Vac).

o AC voltage range: 183–264 Vac; AC frequency 59.3–60.5 Hz; THD < 3%; adjustable PF.

o DC input: up to 200% DC oversizing; 480 Vdc max, nominal 380 Vdc; Max input short circuit current 45 A.

• Enclosure: NEMA 4X, indoor/outdoor, coastal suitable.

• Safety: Integrated AFCI and Rapid Shutdown capability (NEC 690.11/690.12).

• Listings/Certifications: UL 1741SB, tested to IEEE 15472018/1547.12020; CSA equivalents.

• Metering/Monitoring: Embedded ANSI C12.20 Class 0.5 revenue grade production data; module level monitoring via

SolarEdge platform; integrated WiFi/Ethernet/RS485; consumption CT support.

• Commissioning: SolarEdge Set App mobile commissioning.

Note (Domestic Content): SolarEdge indicates USA manufactured variants and potential domestic content eligibility when paired with qualified optimizers; Owner will evaluate incentive applicability separately.

2.2 Accessories

• Optimizers: Verify existing MLPE compatibility; replace in-kind if required to maintain PV hazard control and monitoring.

• Disconnects & Labels: Lockable AC/DC disconnects; NEC 690 placards/rapid shutdown labels.

• Networking Hardware: Ethernet preferred; WiFi only with Owner approval.

• Corrosion Control: 316 SS fasteners; isolation of dissimilar metals for coastal conditions (per NEMA 4X intent).

PART 3 — EXECUTION

3.1 Removal & Disposal

• Deenergize and LOTO; remove existing inverter and associated hardware designated for removal; legally dispose/recycle per Division 01 Hazardous Material & Waste Management.

3.2 Installation

• Install per OEM manual; observe clearances, torque specs, conductor ratings and terminations.

• Verify string polarity/IR, ground continuity; correct any insulation resistance issues before energization.

• Integrate rapid shutdown initiation device(s); verify ≤30 V outside array and ≤80 V inside within 30 s of initiation.

• Implement IEEE 1547 grid support functions (Volt VAR, Volt Watt, frequency response, ride through) per utility settings and within UL 1741SB certified ranges.

3.3 Labeling & Documentation

• NEC 690 labels; rapid shutdown placards; update single line diagram posted at panel and in O&M binder.

3.4 Field Quality Control & Commissioning

• Pre-functional checks: torque audit; IR/megger; ground electrode verify.

• Functional tests:

o On grid AC performance (kW/kVA/PF/THD); communications/monitoring.

o Rapid shutdown timing/voltages per NEC 690.12.

o IEEE 1547 function verification (screenshots/logs).

• Submit Commissioning Report per Division 01 QA/QC.

3.5 Training & Turnover

• Deliver O&M manuals, warranty certificate (≥12 years), and final as built single line.

3.6 Warranty

• Manufacturer warranty ≥12 years; Contractor workmanship 1 year.