ACDC Energy Matters LLC

PV SOLAR & ESS SIZING interconnection constraints financial validation

Outputs are derived from regulatory constraints, PV & ESS engineering inputs, and tariff structure — not blended assumptions

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our foundation

Three Pillars of Engagement

Each pillar is expanded in detail below

1

Regulatory

2

Design

3

Financial

 Regulatory Clarity

(Pillar 1 Boundary Conditions)

PV & ESS Design Solutions

(Pillar 2 System Definition)

Investor-Driven Value & Analysis

(Pillar 3 Decision Validation)

pillar 1 Boundary conditions

Regulatory Clarity

1. Defines what is permitted, interconnectable, and constructible before design begins

2. Determines system size, export eligibility, and regulatory constraints

3. ensures alignment with incentive and compliance requirements

NYC framework

  • Local Laws 92 & 94 (solar/green roof mandate)

  • NYC Electrical Code (NEC Articles 690, 705, 706 with local amendments)

  • FDNY Rule 3 RCNY §608-01 (Energy Storage Systems)

  • NYC Fire Code (rooftop access, setbacks, pathways)

  • NYC Building Code (structural loading and mounting)

  • DOB filing workflow (PW1 plan approval Letter of Completion)

  • Property Tax Abatement (PTA) coordination

NYC Authority

Load Serving Entity (LSE / Con Edison / Electrical Utility Grid Authority)

Governs interconnection approval, system capacity limits, export eligibility, and grid constraints. Determines whether a system can interconnect, how large it can be, and whether export is permitted or limited.

Local AHJ (NYC DOB / Building / Electrical / Fire)

Approves plans, permits, and inspections for compliance with building, electrical, and fire codes; enforces physical installation constraints and final sign-off.

CA FRAMEWORK

  • NEM 3.0 (Net Billing Tariff – avoided cost/ export valuation)

  • California Electrical Code (CEC Articles 690, 705, 706)

  • Title 24 (energy compliance interaction)

CA AUTHORITY

Load Serving Entity (LSE / Rule 21 Authority)

Governs interconnection approval, export limits, and system capacity under Rule 21..

Local AHJ (Building / Electrical / Fire)

Governs plan review, permitting approval, and inspection for compliance with adopted building, electrical, and fire codes. Establishes physical installation requirements (setbacks, access pathways, equipment placement) and enforces sign-off prior to operation.

Determines minimum system size, export limitation usable area, and overall project feasibility before engineering begins

Interconnection (LSE) ≠ Permitting (AHJ)

Decision Trigger
Checkpoint

Used when:

  • System size is unclear
  • Feasibility is uncertain
  • Regulatory constraints must be defined

Financial outcomes require validation before:

  • Engineering approval
  • Capital deployment
  • Execution decisions
pillar 2 SYSTEM DEFINITION

PV & ESS Design Solutions

Defines how the system is engineered within regulatory and interconnection constraints.

System Sizing & Load Alignment

  • Interval load analysis (kWh / kW)

  • Peak demand characterization

  • Load vs production alignment

Production Modeling

  • Irradiance datasets (kWh/m²)

  • Geometry inputs (azimuth, tilt, shading, solar position)

  • System derate factors and loss assumptions

System Topology

  • AC vs DC coupling selection based on interconnection limits and dispatch strategy

  • Inverter architecture and string configuration tied to shading, code compliance, and controls

  • Interconnection configuration (supply-side vs load-side) based on service capacity and code constraints

  • Energy Storage System (ESS) and resiliency configuration (partial-load vs whole-facility support)

Space
Planning

  • FDNY-compliant setbacks, pathways, and roof access zones

  • Equipment placement (PV, ESS, BOS) constrained by structural capacity and fire code

  • Conduit routing feasibility and voltage-drop considerations

  • Equipment clearances, working space, service access, and constructability constraints

Energy Storage Integration

  • kW demand reduction (peak shaving)

  • kWh time-of-use arbitrage

  • Load shifting based on tariff intervals

  • Export vs self-consumption optimization

  • Dispatch logic tied to rate structure and load profile

System Decisions Supported

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pillar 3 Decision Validation

Investor-Driven Value & Analysis

Determines whether the system produces real financial outcomes based on actual operating conditions.

Tariff
Decomposition

  • kWh energy charges (PV impact)

  • kW demand charges (ESS impact)

Methodology

  • Removal of non-controllable costs from savings calculations

  • Realistic energy inflation assumptions

  • Production modeling using irradiance data combined with site-specific geometry

  • Validation of savings against the actual tariff structure rather than blended rates

Validation
Outputs

  • ROI, IRR, and payback

  • Sensitivity analysis

  • Identification of overstated savings and flawed assumptions

Prevents

  • Incorrect system sizing

  • Overstated financial projections

  • Misaligned ESS strategies

Platform Positioning

ACDCEM operates as a technical layer within a project ecosystem.

  • Engineering firms extend
  • Developers validate
  • Investors Verify

Extends capabilities without replacing existing roles

ACDC ENERGY MATTERS
Process

Step 01

Regulatory constraint definition

Step 02

Engineering modeling

Step 03

Financial
validation

Step 04

Advisory
output

Engagement Model

Regulatory + System Definition

Design Validation

Owner’s Engineer/ Oversight

Engagement Types

  • Feasibility & Regulatory Constraint Review
  • Interconnection & Export Limitation Strategy
  • PV & ESS System Sizing Validation
  • Energy Storage Demand-Management Analysis
  • Tariff & Financial Validation (ROI / IRR / Payback)
  • Technical Due Diligence for Investors & Developers
  • Owner's Engineer & Design Oversight
  • Engineering Coordination & Permit Support

Technical Insights &
Decision Notes

NEM 3.0 system sizing errors
Demand charges PV-only limitations

Request
Technical Review

Engage Ric Breines for a detailed technical review of regulatory constraints, system design, and financial assumptions.