Application / Integrated energy

EV Charging, Solar & Storage Microgrids

An EV charging microgrid should coordinate charging demand, grid capacity, solar production, battery dispatch, tariffs, user dwell time, and site operations.

Integrated solar, battery storage, and EV charging site

What the ev charging and microgrid solution must accomplish

An EV charging microgrid should coordinate charging demand, grid capacity, solar production, battery dispatch, tariffs, user dwell time, and site operations.

Charger nameplate totals can exceed the site's coincident demand, yet unmanaged peaks may overload the electrical service or create high demand charges. Solar and storage help only when power limits, energy opportunity, control logic, and vehicle usage are modeled together.

Recommended system-design approach

Profile charging sessions and site loads, set the grid import limit, model solar production, then coordinate load management, battery power and energy, charger networking, EMS, transformer, switchgear, protection, metering, and fallback modes.

  • Charger count, power, connector, vehicle mix, dwell time, concurrency, and service level
  • Existing load, service capacity, transformer, switchgear, cable route, and grid limit
  • Solar profile, storage power and duration, dispatch priorities, tariffs, and resilience goal
  • Charger management, EMS, metering, networking, payment, access, and data ownership
  • Civil layout, parking flow, fire design, accessibility, expansion, and maintenance

How to prepare a technical brief

A useful technical brief describes the operating problem before naming a product. Follow the steps below so the proposal can be sized against real loads, constraints, and operating priorities.

  • Collect charging-session assumptions and interval site-load data.
  • Set a defensible grid import and service-capacity limit.
  • Model managed charging before adding storage.
  • Define normal, constrained, islanded, and communication-failure behavior.

Battery storage planning questions and working template

When should an EV charging site consider battery storage?

First compare managed charging with the site's available grid capacity and service requirements. If a battery is being evaluated, provide charging-session data, simultaneous demand, existing site loads and available recharge windows. The assessment must cover both supplying a charging peak and restoring the battery before the next required session.

Can stored energy reach every charging port in the same way?

Check the proposed electrical architecture. Shared storage and storage assigned to individual ports create different supply paths and operating constraints. Ask how charging power is allocated during simultaneous sessions, how the battery recharges, and what happens when equipment or communications are unavailable. Record the charger, battery and EMS responsibilities.

Blank BESS site-data template

Use one row per recorded interval. Keep measured, forecast and proposed records distinct. Power fields contain interval averages; do not relabel instantaneous readings as averages. Energy fields contain interval energy, not cumulative meter registers. Enter charging, discharging, import and export as separate non-negative magnitudes. Identify AC and DC boundaries without converting one into another by assumption.

Download blank CSV template

Fill measurement fields only from available records. EV fields may be inapplicable to C&I sites; BESS fields may be unavailable before installation. Record missing or inapplicable fields and the reason. If the sampling interval is unknown or irregular, leave it blank and explain. This interval sheet accompanies the charging-session, tariff, grid-limit and operating-priority information described in the guides; it does not replace them.

Blank means unavailable, not supplied or not applicable; it never means zero or pass. Enter zero only when the source explicitly records zero. Do not include names, email addresses, phone numbers, driver identities or payment data.

View CSV fields and recording guidance
Blank BESS site-data template — field definitions
CSV fieldWhat to record
interval_start_iso8601Interval start, including a UTC offset.
interval_end_iso8601Interval end, including a UTC offset.
time_zone_ianaSite time zone for operating and billing periods.
original_sampling_interval_sOriginal source sampling interval in seconds; preserve native resolution.
record_basisIdentify measured, forecast or proposed records.
measurement_boundary_notesIdentify the meters and boundaries for the populated fields.
site_ac_import_average_power_kwAverage AC power imported at the site boundary.
site_ac_export_average_power_kwAverage AC power exported at the site boundary.
site_ac_import_energy_kwhAC energy imported during this interval.
site_ac_export_energy_kwhAC energy exported during this interval.
charger_ac_input_average_power_kwAverage AC power entering the identified charger or charger group.
charger_ac_input_energy_kwhAC energy entering that charger or group during this interval.
vehicle_dc_delivered_energy_kwhDC energy delivered to vehicles during this interval.
bess_ac_charge_average_power_kwAverage charging power entering the BESS AC boundary.
bess_ac_discharge_average_power_kwAverage discharge power leaving the same BESS AC boundary.
bess_ac_charge_energy_kwhCharging energy entering the BESS AC boundary during this interval.
bess_ac_discharge_energy_kwhDischarge energy leaving the same BESS AC boundary during this interval.
bess_soc_at_interval_start_pctRecorded battery state of charge at interval start.
bess_soc_at_interval_end_pctRecorded battery state of charge at interval end.
missing_fieldsList unavailable or inapplicable field names for this record.
missing_data_reasonExplain missing or inapplicable data, or state that the reason is unknown.
source_referenceReference the original export using a non-personal file or record ID.

Product starting points

Compare suitable product starting points

Use published ratings to create a shortlist, then confirm the final configuration against the project data and site conditions.

PowerFac-261 125 kW / 261 kWh Liquid-Cooled ESS

energy storage

PowerFac-261

An all-in-one outdoor liquid-cooled system rated at 125 kW / 261 kWh for commercial, industrial, charging, and low-voltage distribution applications.

Rated power
125 kW
Nominal energy
261 kWh
AC connection
400 V, 3W + N + PE

Technical reading

Use the supporting selection guides

selection guide

C&I BESS Sizing Guide

A defensible C&I battery energy storage system size comes from interval load data, a ranked operating objective, power constraints and usable energy at a stated measurement point. Start with the duty the site needs, then evaluate the cabinet or container configuration against it.

Read guide →
buyer guide

BESS Safety Review

A BESS safety review should connect cell and module behavior to electrical protection, BMS controls, thermal management, enclosure, fire strategy, emergency response, site layout, installation, and operating procedures.

Read guide →
buyer guide

BESS RFQ Checklist

A useful BESS RFQ states the operating objective, site data, power, usable energy, duration, electrical interface, environment, safety requirements, scope split, documents, and acceptance criteria.

Read guide →

Frequently asked questions

What buyers ask before specifying a battery system

What information is needed to size a battery energy storage system?
Provide the load profile, target power and energy duration, grid or generator constraints, installation environment, operating temperature range, and the functions the system must perform. A single capacity figure is not enough for responsible system selection.
Is nameplate energy the same as usable energy?
Not necessarily. Usable energy depends on the permitted state-of-charge window, operating conditions, conversion losses, control strategy, and project limits. Ask for both nominal and usable values in the final proposal.
What safety information should a BESS proposal include?
A project proposal should identify the cell chemistry, electrical protection, BMS architecture, thermal management, enclosure rating, fire strategy, emergency isolation, monitoring, installation limits, and the standards required by the destination project.
Which certifications are available?
Certification scope varies by model and destination. Request the current certificate and test-report package for the exact quoted model.

Discuss a EV charging and microgrid project

Battery storage options for your site’s loads and operating needs.