System Overview

Skid 2 · Off-Grid DC Fast Charging — PV (AC + DC coupled) + BESS · 750 VDC bus, 600 kW

System Status

NORMAL

Code 0 · full capacity

Available Power

582 kW

bus limit 600 kW

BESS SOC

62.4 %

BA1-1 · 3.5 MWh

DC Bus Voltage

750.2 V

target <800 V · cutoff 825 V

Power Flow — Live Mimic updating…

PV (DC-coupled → MPPT) BESS Charger load

Tip: click a device box to open its page.

DC Bus Regulation

Safe window712.5 – 800 V

Charger hard cutoff825 V

BESS State of Charge

Demo · drag to test SOC modes62%

MPPT hold / resume90% / 87%

Charger limited / maint / term18 / 10 / 8%

Device Health 9 nodes · EtherNet/IP + Modbus RTU

Generation & Dispatch

PV (DC-coupled) → MPPT216 kW

BESS ↔ CNVTR-1 (bidirectional)198 kW

Charger demand (DC600)582 kW

AC / site loads64 kW

Est. time remainingUnlimited

CNVTR-1 forms the 750 V bus and is bidirectional with the battery. CNVTR-2 (MPPT) feeds PV into the battery / CNVTR-1. STs grid-form 480 V for aux/site loads. PLC does pre-emptive curtailment; OV trip lives in converter firmware.

Stabiliti AC Output — Voltage & Current 480 V grid-form · per unit + total

Unit	AC Voltage	AC Current	AC Power

Active Events View all →

Power Flow & One-Line

Rev 9 topology — TB1 750 VDC bus (≤600 kW) · CNVTR-1 bus-former

System Mimic live

Tip: click a device box (PV, CNVTR-1, CNVTR-2, BESS, ST-1/2/3, charger) to open its page.

CNVTR-2 · MPPT

RoleFeeds Batt / CNVTR-1

PV in216 kW

Battery → CNVTR-1410 kW

Rating825 A / ≤600 kW

CNVTR-1 · BESS-side

RoleForms 750 V bus

BatteryCharge ↔ discharge

Output → CNVTR-1198 kW

SOC62.4 %

Stabiliti ST-1/2/3

DC-in (from bus)168 kW

480 V AC out64 kW

Converting3 / 3

FlowDC-in → AC

DC600 → Satellites

Demand582 kW

Sessions2

Bus V @ charger749.8 V

Ports600/300/300

Solar / MPPT

DC-coupled PV via CNVTR-2 MPPT — 4 inputs · 3 sub-arrays each · ~1300 V

Total PV 216 kW

CNVTR-2 · MPPT

◆ DC-Coupled PV

216 kW

PV array → MPPT DC-DC → charges BESS BA1-1 (DC-coupled). 4 inputs · 3 sub-arrays each.

PV1 60 kWPV2 56 kWPV3 48 kWPV4 52 kW

DC-coupled MPPT — CNVTR-2 PDS1750K placeholder map

PV Total Power

216 kW

reg 34053

Bus-Side Power

212 kW

reg 34078

Energy Today

1.84 MWh

reg 34082/83 · PV port

Module Temp

41 °C

reg 34081 · amb 33

MPPT config RW · 34219–34227

PV Wakeup V

250 V

34219–21

PV Max V

1300 V

34224–26

Bus Run V

750 V

34223

Bus Power Limit

600 kW

34227

PV access quantity (RW 265, 0–20) sets active inputs; 4 inputs × 3 sub-arrays.

Alarms & Faults

Fault handling · OV trip in converter firmware · PLC pre-emptive curtailment

Critical

0

system-stopping

Warnings

1

derate / advisory

Info (24h)

14

state transitions

Bus OV margin

74 V

to 825 V cutoff

Active & Recent

Monitored Fault Types

Stabiliti · ST-1 / ST-2 / ST-3

3 × CE+T Stabiliti — powered from the 750 VDC bus (DC-in) · 24 V control · grid-form 480 V AC (one-directional)

3 / 3 converting

Per-unit status & ports CE+T map · reg 96–110 · status bits

Unit	AC port	DC-in (bus)	Temp	Grid-form	Derate	Fault

Status word bits: 0 converting · 1 grid-forming · 2 derating · 3 fault since power-cycle · 4 AFCI · 5 GFDI · 6 self-test fail · 7 IMI · 8 E-stop · 9 24 V UV · 10 fault active. Baker thermal-derate risk present but lower (STs don't supply DC output).

CNVTR-2 · MPPT DC-DC

Primarily charges the batteries (~1200–1300 VDC); can charge the skid during daytime. Does not form the 750 V bus.

MPPT active

Output → CNVTR-1

410 kW

to battery / CNVTR-1

PV Input (MPPT)

216 kW

4 inputs · 3 sub-arrays

Battery V (charge)

1250 V

~1200–1300 VDC · 825 A

Efficiency

98.2 %

converter

Detail

RoleMPPT — feeds Battery / CNVTR-1

SourcePV (DC) via MPPT

Charge current547 A

Module temp41 °C

Leak current4 mA

CommsModbus RTU · OK

MPPT / PVDC registers PDS1750K placeholder

Reg	Field	Value

Placeholder map — to be replaced by the CNVTR-2 Modbus map when issued. Full per-input MPPT is on the Solar / MPPT page.

String temps & contactors reg 55–77 · moved from BESS

CNVTR-1 · BESS-side DC-DC

Forms the 750 V bus · bidirectional with BESS BA1-1 (960–1404 V)

Online

Throughput

198 kW

battery ↔ bus

Battery-side V

1180 V

range 960–1404

Bus-side V

750 V

forms TB1 bus

Efficiency

98.0 %

converter

Detail

FunctionBattery conditioning DC-DC

Battery current168 A

Max battery current1600 A

ModeCharge ↔ discharge

Temp37 °C

CommsModbus RTU · OK

Sources combinedPV via MPPT & Batteries

Notes

CNVTR-1 forms the 750 V bus and is bidirectional with the battery — it charges the battery from PV (via CNVTR-2 / MPPT) and discharges the battery to the bus. CNVTR-2 (MPPT) feeds PV into CNVTR-1 / the battery. Dedicated CNVTR-1 Modbus map pending.

BESS · BA1-1

960–1404 VDC · 3.5 MWh · 1600 A max · floating — via CNVTR-1 → CNVTR-2

Online

State of Charge

62.4 %

reg 40 (×0.1)

Pack Voltage

1180 V

reg 37 · 960–1404

Pack Current

168 A

reg 38 · +dis/−chg

State of Health

99.1 %

reg 41

SOC Operating Bands Skid 2 · operator-adjustable

BESS / BMS — key registers via CE+T PMS map + ENEMS BMS

Reg	Parameter	Value	Unit	R/W

EV Charge Controller · DC600

DC600 controller (1200 A) → 3 satellites · 6 ports (2 per satellite) · liquid-cooled · NAC

Normal

Aggregate Demand

582 kW

active ports

Available (from PMS)

600 kW

bus-power anchor

Active Sessions

3

of 6 ports

Est. Time Remaining

999 min

999 = unlimited

PMS → DC600 (writes) available-power anchor · map pending

Field	Value

DC600 → PMS (reads)

Field	Value

Configuration

Operator-adjustable setpoints — staged, then dispatched by the AB PLC (supervisory rate)

MPPT Charge Control control point 1 · bounded by live BMS charge-power limit

Charger / SOC Availability control point 2 · SOC-gated charging

Station Messaging driver-facing charger screens

DC Bus & Curtailment

PV surge & ramp protection Baker FR-A

Alerting & Comms

Comms / Modbus

Carbon DC EMS · AB CompactLogix 5380 — EtherNet/IP primary + Modbus RTU gateway

Stabiliti (CE+T) — key reads Input 30X · Rev 15

Reg	Parameter	Scale	Unit	Dir

Device Bus Map

Device	Protocol	Poll	Heartbeat	Status

Operations

Devices

Engineering

System Overview

Power Flow — Live Mimic updating…

DC Bus Regulation

BESS State of Charge

Device Health 9 nodes · EtherNet/IP + Modbus RTU

Generation & Dispatch

Stabiliti AC Output — Voltage & Current 480 V grid-form · per unit + total

Active Events View all →

Power Flow & One-Line

System Mimic live

CNVTR-2 · MPPT

CNVTR-1 · BESS-side

Stabiliti ST-1/2/3

DC600 → Satellites

Solar / MPPT

MPPT config RW · 34219–34227

Alarms & Faults

Active & Recent

Monitored Fault Types

Stabiliti · ST-1 / ST-2 / ST-3

Per-unit status & ports CE+T map · reg 96–110 · status bits

CNVTR-2 · MPPT DC-DC

Detail

MPPT / PVDC registers PDS1750K placeholder

String temps & contactors reg 55–77 · moved from BESS

CNVTR-1 · BESS-side DC-DC

Detail

Notes

BESS · BA1-1

SOC Operating Bands Skid 2 · operator-adjustable

BESS / BMS — key registers via CE+T PMS map + ENEMS BMS

EV Charge Controller · DC600

PMS → DC600 (writes) available-power anchor · map pending

DC600 → PMS (reads)

Configuration

MPPT Charge Control control point 1 · bounded by live BMS charge-power limit

Charger / SOC Availability control point 2 · SOC-gated charging

Station Messaging driver-facing charger screens

DC Bus & Curtailment

PV surge & ramp protection Baker FR-A

Alerting & Comms

Comms / Modbus

Stabiliti (CE+T) — key reads Input 30X · Rev 15

Device Bus Map

Logs & Trends

Trend — Power & SOC last 60 min

Logged Data Points

Event Log newest first

Commissioning & Test

Startup Sequence — SOC gates

Preconditions

MVP Test Scenarios

UI Review — comments