UTILITY INTERFACE & GRID DEMARCATION BRIEF DOC REF: AM-EF150-HKE-2026 // FORM C.I. 141 PRE-CONSULTATION

SHORE-POWER FAST-CHARGING & BESS BUFFER INTERFACE

Joint Site Walkover with HK Electric Distribution Planning Department — Sheung Wan Landing No. 1

AERO-MARINE SYSTEMS LTD
Date: 21 Oct 2026 (Wed)
Site: Sheung Wan Landing No. 1

1. UNIDIRECTIONAL SHORE-TO-BESS SINGLE-LINE TOPOLOGY (ZERO GRID EXPORT)

EMSD CoP & HKE SUPPLY RULES COMPLIANT
[1] HKE LV SUPPLY NODE
380V / 220V 50Hz 3-Ph 4-Wire
  • • Phase 1: 250–300 kW (~400A TPN)
  • • Phase 2: 600–900 kW (~1250A TPN)
  • • Drawn from nearest HKE LV pillar / local 1.5 MVA transformer
Flat 24/7 High-Load-Factor Profile
[2] FIXED ONSHORE CABINET
Seawall Apron Demarcation
  • • Footprint: 1.5m (W) × 0.8m (D) IP66
  • • HKE CT Chamber & Smart Tariff Meter
  • • Main ACB/MCCB + Earth Leakage
  • • Reverse-Power Relay (ANSI 32R)
FIXED LAND BOUNDARY (NO PONTOON METER)
[3] FLOATING BESS BUFFER
Unidirectional AC/DC Rectifier
  • • Zero Back-Feed: Dedicated AC-to-DC charger (No grid-tie inverter export)
  • • 400 kWh (Ph1) → 4.0 MWh (Ph3) Marine LFP Buffer
  • • Galvanic isolation + shore interlock
Eliminates Megawatt Spikes on HKE Grid
[4] VESSEL DC DISPENSER
800V DC Ultra-Fast Turnaround
  • • Stage 1 (BAYWING-D2): 500 kW DC CCS2/MCS (25-Pax Intra-Harbour)
  • • Stage 2 (EF-150): 3.5 MW DC MCS Robotic Arm (150-Pax Macau)
  • • 10–15 min berth top-up (50% DoD)
Decouples Vessel Peak from Grid Draw

2A. WALKOVER TECHNICAL CHECKLIST

1. Nearest HKE Supply Take-Off Point

Identify nearest HKE LV Pillar / Shun Tak perimeter switchroom and measure cable trench distance to Landing No. 1 apron.

Pillar / Sub ID: ______________________
2. "Zero-Excavation" LV Headroom Ceiling

Confirm maximum continuous kW/Amp load available immediately from existing local transformer without major roadworks.

Available LV Cap: ________ kW (_____ A)
3. Onshore Switchboard Demarcation

Confirm suitability of fixed concrete seawall apron behind Landing No. 1 for customer IP66 meter/isolator pillar (+5.0mPD flood clearance).

4. Passive 11kV Provisioning ("Dark Ducts")

Assess option to reserve spare cable ducts during upcoming Chung Kong Rd / waterfront works for Phase 3 (1.5–3.0 MW).

2B. SHEUNG WAN LANDING NO. 1 — CABLE ROUTE & PILLAR MARKUP SCHEMATIC [FOR ON-SITE PEN ANNOTATION]
VICTORIA HARBOUR WATERFRONT (BERTHING ZONE) ZONE B: FLOATING BESS & CHARGER D2 (500kW) / EF-150 (3.5MW Buffer) FIXED CONCRETE SEAWALL / WATERFRONT PROMENADE (+5.0mPD) SHUN TAK CENTRE / HK-MACAU FERRY TERMINAL (Existing HKE Transformer Rooms) SHEUNG WAN LANDING NO. 1 ZONE A: FIXED DEMARCATION 1.5m × 0.8m IP66 Switchboard (HKE Meter + Main MCCB + 32R) CHUNG KONG ROAD / PUBLIC FOOTPATH UTILITY CORRIDOR (SKETCH NEAREST HKE LV PILLAR BELOW) HKE?
Est. Trench Distance: _________ m Target Demarcation: Fixed Seawall Apron (Zone A)

3. PHASED LOAD FORECAST & MULTI-PIER HK ISLAND ELECTRIFICATION ROADMAP

Bridging Intra-Harbour Short Routes (BAYWING-D2) to Cross-Boundary Macau Corridor (EF-150)
Pier / Waterfront Node Deployment Phase & Vessel Continuous HKE Grid Draw On-Berth BESS & DC Output Strategic Role & Route Scope
1A. Sheung Wan Landing No. 1 (Phase 1–2 Pilot) Phase 1–2: BAYWING-D2 (25-Pax) 250 kW → 900 kW LV (380V AC) 400 kWh – 1.2 MWh BESS / 500 kW DC Public landing validation of HKE LV-to-BESS demarcation & intra-city pilot trials
1B. Sheung Wan / HK–Macau Terminal (Phase 3) Phase 3: BAYWING EF-150 (150-Pax) 1.5 MW – 3.0 MW (11kV HV / Dual TX) 4.0 MWh BESS / 3.5 MW MCS Arm 20-min turnaround for cross-boundary HK–Macau & GBA high-speed routes
2. Central Piers (Pier 7–10 Corridor) Phase 2: BAYWING-D2 Fleet 250 kW – 500 kW LV (380V AC) 500 kWh BESS / 500 kW DC Fast Charge High-frequency ultra-short cross-harbour & outlying island commuter routes
3. Wan Chai Ferry Pier Waterfront Phase 2: BAYWING-D2 Fleet 250 kW – 500 kW LV (380V AC) 500 kWh BESS / 500 kW DC Fast Charge Cross-harbour & East Harbour zero-emission commuter network