🔋 Energy Storage

Battery Energy Storage System (BESS) Design

From residential backup to commercial peak shaving — we size, specify, and engineer battery systems that integrate cleanly with your solar array, electrical service, and grid connection.

☀ Free Solar Study Get a Quote
Who This Is For

Is This the Right Service?

🏠

Solar-Plus-Storage Homeowners

You've completed or are planning a solar system and want to maximize self-consumption, reduce export, or protect critical loads during outages. You need a designed system that your utility and ESA will accept.

🏗

Commercial & Industrial Facilities

You have high demand charges, participate in (or want to join) demand response programs, or need backup power for critical operations. A BESS study will quantify the ROI before any capital is committed.

What You Get

Deliverables

  • Critical load analysis and islanding requirements
  • BESS sizing — capacity (kWh) and power (kW) determination
  • Inverter/charger selection and compatibility check
  • Dispatch strategy (backup, self-consumption, peak shaving)
  • HOMER Pro 8,760-hr simulation for commercial systems
  • Battery room/enclosure design and ventilation requirements
  • Transfer switch and protection design
  • Utility protection relay settings (anti-islanding)
  • P.Eng sealed SLD and permit drawing set
  • Commissioning checklist and startup support
How We Work

The Process

1
Load & Priority Analysis
Map all loads, identify critical vs. non-critical, determine backup duration requirements and minimum kW during islanding.
2
System Sizing & Simulation
HOMER Pro or Energy Toolbase simulation to optimize battery capacity and inverter sizing for your specific load profile, solar generation data, and utility tariff.
3
Equipment Selection
Select battery chemistry (LFP preferred for safety), inverter/charger brand and model, BMS integration, and enclosure type based on site conditions.
4
Engineering Drawings & Permit Set
P.Eng sealed SLD, conduit routing, protection schematic, battery room layout, ventilation calculations, and interconnection documentation.
5
Commissioning Support
Commissioning checklist, functional performance test criteria, and optional on-site commissioning witness as Owner's Engineer.
Common Questions

FAQ

What battery chemistry do you recommend?
We typically specify Lithium Iron Phosphate (LFP) for its superior thermal stability, 3,000–6,000 cycle life, and lower fire risk compared to NMC chemistry. NMC may be considered where space is constrained and energy density is paramount. We do not specify lead-acid for new installations except in specific remote/off-grid cases.
Can BESS meaningfully reduce my demand charges?
Yes — for facilities with significant demand charges ($15/kW or higher), a well-sized BESS can shave 20–40% off peak demand. The ROI depends heavily on your demand charge rate, how predictable your peaks are, and whether a solar array provides additional offset during peak windows. Our HOMER simulation quantifies this for your specific load profile.
Does my utility require special approvals for battery storage?
Yes. Most Canadian utilities require a P.Eng stamped interconnection package including anti-islanding protection settings, transfer switch specifications, and updated SLD. ESA inspection is required in Ontario. We prepare all required documentation as part of our Standard and Premium packages.