– Daily Business

Global electricity demand continues to rise, increasing the need for software that coordinates devices that consume and manage that power. The IEA’s Electricity 2025 report projects demand growth of nearly 4% a year through 2027, adding about 3,500 TWh over three years. Many sites combine equipment from different vendors and generations. A building might run a legacy management system alongside new heat pumps and a battery accessible only through its vendor’s cloud API. An EMS needs an adapter for each system it monitors or controls. This guide compares 7 vendors through their published energy projects, helping you evaluate top custom energy management development companies based on evidence. It also covers the five phases of a custom EMS build and proposal red flags to catch before signing.

Photo by Fatih Yurtman : https://www.pexels.com/photo/woman-working-with-electrical-equipment-17843269/
5 Phases of a Custom EMS Project

A custom EMS develops in stages, with each phase producing clear deliverables. These five phases help you track progress and hold the project team accountable:

Discovery and Device Inventory

The vendor documents every device, protocol, firmware version, and business system the EMS must support. This phase produces an inventory and risk list that shape the project estimate.

Architecture and Data Layer Design

Engineers define how data moves, where it’s stored, and how quickly control signals must travel. Before development begins, you should receive architecture diagrams, a data model, and latency targets for each use case.

Proof of Concept With Live Hardware

A small build connects one or two asset types and tests the highest-risk integration. The results show whether the architecture works before you commit a larger budget.

Integration Rollout

The team connects the remaining devices, grid interfaces, and business systems in planned increments. The team tests each integration against real hardware and live data before starting the next, so issues surface early and don’t affect systems already in production.

Operations and Handover

The final phase covers monitoring, alerts, documentation, and knowledge transfer. Define who will operate the platform after launch and ensure your engineers can deploy and troubleshoot it independently.

The List of the Top Custom Energy Management Development Companies

These companies develop the software and device-level code used to monitor, control, and settle energy across connected assets. Our market review identified seven vendors with named clients or detailed energy projects. Here’s how their published work compares:

Company
Signature project
Hardware layer 
Delivery format

HBM
HEMSlogic Gateway platform for Inno2Grid
Real-time sensor and meter data from PV systems, smart meters, EV chargers
Concept-to-launch builds, a team inside a live platform, or modernization of existing solutions

Intelliarts
EVIQ charging management platform and app
Charge points over OCPP 1.6 and 2.0, OCPI, ISO 15118
Consulting, custom builds, pre-built customization, project takeover

Zoolatech
Apps and AWS migration for Complete Solaria
AMI head-ends, field sensors, SCADA endpoints over OPC UA, DNP3, Modbus, IEC 61850
Team extension, managed delivery, fixed-scope projects

Intellias
Building energy platform for a Fortune Global 500 energy systems maker
Meter data collection and fault detection
Full-stack team under SAFe with monthly releases

WebbyLab
Heat pump connectivity for SmartHeat
ESP32 firmware, heat pumps, boilers, air handlers, MQTT, BLE
Free PoC, fixed platform build, per-device SaaS or IP buyout

Zartis
Embedded engineering for Kaluza
Meter, sensor, and market data pipelines
Embedded teams alongside client engineers

ADUK
Heating EMS with tariff optimization
STM32 Cortex-M3, Raspberry Pi 3, SPI, I2C, CODESYS
Embedded hardware, firmware, and IoT development

HBM

HBM is one of the top custom energy management development companies for platforms that connect sensor data, grid infrastructure, and business software. Its custom-developed data layer collects real-time information from sensors, meters, and connected devices, then presents it through custom dashboards built for complex data and operational decision-making.

Client: Energi.ai
Built: A SaaS platform that helps businesses understand, manage, and reduce emissions, energy use, and sustainability risk, taken from initial concept to a production-ready MVP with live users and beyond to product global expansion
Scope: Emissions calculations across GHG Protocol scopes, analytics for non-technical users, industry benchmarks, machine learning forecasts and AI-based data interpretation and recommendations.

HBM also develops grid and utility integrations, billing, ERP, and CRM connections, and payment workflows. Its OYO Communities project included settlement flows for community self-consumption. Beyond new products, HBM modernizes existing energy solutions, improves their quality and performance, and adds AI, data consolidation, and analytics to live platforms. The company brings more than 16 years of product development experience, and around 90% of its engineers hold senior roles.

Intelliarts

Intelliarts develops EV charging and renewable energy software. The company reports 10 years of energy industry experience and 90 completed large-scale projects. For EVIQ, the team delivered core components of a charging management platform and mobile app in six months, including station onboarding, monitoring, and lifecycle management.

Client: Greenlane
Built: A charging point management system with fleet management and an eMSP mobile app built on a customized existing platform
Scope: Real-time charging updates, vehicle status monitoring, energy management, and reporting

Intelliarts also developed an OpenADR integration that shifts charging schedules during peak demand and a power management system that allows site operators to limit load. Its work for EV Connect includes predictive maintenance for charging stations.

Zoolatech

Zoolatech develops energy platforms that monitor consumption by site, meter, and asset. Its capabilities include load balancing, battery dispatch, DERMS coordination, and emissions accounting. Published technology stacks include Apache Kafka, TimescaleDB, and InfluxDB. The company was founded in 2017 and reports more than 600 employees.

Client: Complete Solaria
Built: Customer-facing applications and an AWS cloud migration
Scope: Agile product delivery, systematic technical debt reduction, and faster installation workflows

Zoolatech connects devices through OPC UA, DNP3, Modbus, IEC 61850, and MQTT, normalizing the data into a shared schema. Its published capabilities also include IEC 61968 and IEC 61970 Common Information Models for meter and grid data. Listed compliance experience covers NERC CIP, IEC 62351, NIS2, and ISO 50001.

Intellias

Since 2012, Intellias has worked on a cloud-based building energy platform for a Fortune Global 500 manufacturer of distributed energy systems. The platform serves more than 750 companies, controls 48,000 buildings, and processes billions of meter readings each year.

Client: MCS Solutions
Built: An energy management module for a modular integrated workplace management system
Scope: A dedicated 60-person team working over 4 years on the collection, validation, normalization, and benchmarking of energy data at rates of up to 50,000 data points per second

For the building energy platform, Intellias redesigned the frontend, added fault-detection reports, and connected meter data to accounting systems for billing. The team delivers monthly releases using the Scaled Agile Framework. The published technology stack includes JavaScript, Angular, Java, and AWS.

WebbyLab

WebbyLab provides an IoT platform for HVAC and heating equipment that responds to dynamic tariffs, demand-response signals, and grid balancing events. Features include weather compensation and coefficient of performance tracking. Device connectivity uses ESP32 modules, MQTT, and Bluetooth Low Energy, supported by staged over-the-air firmware updates.

Client: SmartHeat
Built: ESP32 firmware for industrial heat pumps, cloud telemetry, a remote configuration tool, and an end-user application
Scope: Three engineers working for one month, followed by a reported 30% reduction in post-sales support costs and a 4.35% increase in average heat pump efficiency

WebbyLab offers a free proof of concept lasting 1 to 2 weeks, followed by a platform build of about two months. Ongoing commercial options include per-device SaaS pricing, managed support, or an intellectual property buyout. The company also developed an OCPP-compatible EV charging management architecture for MyBox.

Zartis

Zartis develops energy software for solar, wind, and storage forecasting; energy settlement; grid balancing; e-mobility scheduling; field operations; and emissions reporting. Its AI capabilities include load forecasting, fault detection, demand response, and smart charging optimization.

Client: Kaluza
Built: Additional engineering capacity embedded within the client’s product teams
Scope: Zartis engineers working alongside Kaluza staff on energy platform development and delivery

The company has also worked on 3 mission-critical platforms for an energy transition business. Its services cover technology strategy, legacy platform re-architecture, development, and post-launch support. EnergyHub is among the clients listed in the company’s published energy materials.

ADUK

ADUK develops embedded hardware, firmware, and IoT systems. Its services also cover machine vision, AI engineering, and product cybersecurity under the Cyber Resilience Act. Its published energy work focuses on device-level control for heating equipment.

Client: Home heating device manufacturer
Built: An EMS that monitors and controls thermal processes and calculates optimal energy tariffs for heater operation
Scope: Adaptive module recognition, a web-based calibration interface, cloud data management, and versioned software updates

The system uses an STM32 Cortex-M3 microcontroller, a Raspberry Pi 3, and a 16-bit sigma-delta analog-to-digital converter. SPI connects the expansion cards, while I2C connects the ADC and DAC components. Control software runs on CODESYS 3.5 and FreeRTOS.

Red Flags in EMS Vendor Proposals

EMS proposals can look complete while leaving critical terms vague. Check these areas before signing:

Unspecified protocol versions: “OCPP support” means little without a version number. Confirm which versions the vendor supports and test each one against your hardware during the proof of concept.
Unclear data ownership: If the vendor retains the data model or device adapters as intellectual property, switching providers becomes difficult. Require ownership of the code, schemas, and adapters from the first release.
Fixed pricing before device discovery: A fixed quote without a device inventory often leads to costly change requests. Complete a paid discovery phase first and base the estimate on confirmed equipment and integrations.
Code-only handover: Source code isn’t enough. Include runbooks, architecture documentation, training, and knowledge transfer as contract deliverables.

Conclusion

An EMS connects hardware, grid requirements, tariffs, and billing. Weak integrations can cause wasted energy, missed tariff windows, and recurring billing errors.

Evaluating custom energy management development companies requires reference calls, paid discovery, and a proof of concept using your equipment. This work costs far less than replacing a platform that can’t support your devices and gives you clear evidence of what each vendor can deliver.

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