High-Voltage Grid-Scale BESS Implementation Flow — 11 Steps from Consultation to Operation | REVIX JAPAN

Overview

Implementing a high-voltage grid-scale BESS typically takes 12–18 months from initial consultation through grid interconnection and market participation. REVIX JAPAN provides end-to-end support covering design, procurement, and construction (EPC) through market connectivity and operations & maintenance (O&M).

Implementation Flow Overview

STEP 1: Initial Consultation & Needs Assessment
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STEP 2: KYC / NDA Execution / Preliminary Investigation
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STEP 3: Revenue Projection & Detailed Simulation
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STEP 4: Site Survey (Preliminary → Detailed)
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STEP 5: Quotation & Business Plan Presentation
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STEP 6: Contract Execution (Construction contract, equipment sale, etc.)
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STEP 7: Grid Interconnection Application & Permitting
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STEP 8: Design, Procurement & Installation (EPC)
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STEP 9: Grid Interconnection & Inspections
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STEP 10: Aggregator Integration & Market Participation Launch
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STEP 11: Long-Term Operations & Maintenance (TDS 24/365 Monitoring)

Step-by-Step Details

STEP 1: Initial Consultation & Needs Assessment (Estimated: 1–2 weeks)

Begin by contacting us via the web form or email (inquiry@revix.inc). After your inquiry, our representative will conduct a needs assessment online or in person.

Key topics covered:

• Business objectives and approximate investment scale
• Site availability and land information
• Relationship to solar power plants (new or existing)
• Preferred schedule

STEP 2: KYC / NDA Execution / Preliminary Investigation (Estimated: 2–4 weeks)

We conduct a credit check (KYC) and execute a non-disclosure agreement (NDA), then perform a preliminary investigation of candidate sites using publicly available information.

Preliminary investigation scope:

• Hazard map review (flood, landslide)
• Noise regulation zone confirmation
• Initial review of development permit requirements
• Initial assessment of grid interconnection feasibility

STEP 3: Revenue Projection & Detailed Simulation (Estimated: 2–4 weeks)

Based on site information and equipment scale, we prepare and present a detailed revenue simulation. The model combines revenue from all three markets: frequency regulation, capacity, and wholesale electricity.

STEP 4: Site Survey (Estimated: 1–3 months)

Preliminary Survey (Initial) Photography and video of the candidate site, surrounding environment assessment, utility pole and power line location confirmation.

Detailed Survey Comprehensive on-site investigation including soil testing, noise measurement, and boundary confirmation. Confirms installation feasibility and establishes a preliminary construction cost estimate.

STEP 5: Quotation & Business Plan Presentation (Estimated: 1–2 weeks)

Based on the detailed survey results, we present a comprehensive quotation covering construction costs, equipment costs, O&M fees, and a full business plan.

STEP 6: Contract Execution (Estimated: 1–2 weeks)

Upon agreement, we execute a contract in one of the following forms:

• Construction contract
• Completed equipment sale agreement
• Equipment purchase agreement (headquarters-liability or branch-liability type)

STEP 7: Grid Interconnection Application & Permitting (Estimated: 3–12 months)

We file the grid interconnection application with the utility company. For high-voltage and extra-high-voltage connections, the process from connection study through construction cost notification may take several months to over a year. Required permits — including fire department consultation, building confirmation, and farmland conversion — are pursued in parallel.

STEP 8: Design, Procurement & Installation (EPC) (Estimated: 3–6 months)

Following permit acquisition, design, equipment procurement, and installation work commence.

Standard construction scope:

• Foundation work (concrete foundations)
• BESS container delivery and installation
• PCS, EMS, and transformer installation
• Substation equipment installation
• Electrical and communication work
• Fencing and site finishing
• Grid connection work (utility side)

Aggregator selection and integration proceed in parallel with EPC, with market-ready design incorporated from the outset.

STEP 9: Grid Interconnection & Inspections (Estimated: 1–2 months)

Following the utility company's completion inspection and grid interconnection confirmation, formal grid interconnection is completed.

STEP 10: Market Participation Launch (Aggregator Integration)

Following grid interconnection, market bidding and operations commence as soon as EMS system integration with the aggregator is complete.

STEP 11: Long-Term Operations & Maintenance (TDS 24/365 Monitoring)

After commercial operation begins, TDS maintains 24/7/365 remote monitoring continuously.

• Monthly: Remote data analysis and anomaly detection
• Quarterly: On-site inspection, visual check, control system confirmation
• Semi-annual: Output performance test and terminal torque check
• Annual: Comprehensive inspection, insulation resistance measurement, replacement assessment
• 20-year: Capacity guarantee (under maintenance service contract)