Battery Energy Storage · Owner's-Side Engineering

Independent BESS Advisory & Owner's Engineer Services

Owner's-side engineering across the life of a battery storage asset — from technology selection to operation, and independent investigation if something fails.

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Owner's-Side Only

No supply, design, or build conflicts

Cell → Portfolio

Component to multi-site fleet

UL · NFPA · IEC

The standards lenders and insurers apply

Assess & Investigate

Prevention up front, root cause if it fails

The Supplier's Evidence Is Not the Owner's Evidence

Every battery storage system arrives with a thick stack of documentation: test reports, certificates, datasheets, protection schemes, commissioning records. Almost all of it is produced by, or on behalf of, the party selling the system.

That documentation is not wrong. It is answering a different question than yours. A supplier's test report answers did this configuration pass this test. Your question is does the system I am actually buying, as it will actually be installed and operated here, satisfy the authority that must approve it, the lender that must finance it, and the insurer that must cover it.

The distance between those two questions is where BESS projects lose money — in redesign after an AHJ rejection, in retrofit after a failed commissioning, in disputed warranty claims, in premium loading, and occasionally in a loss. Independent, owner's-side engineering closes that distance while it is still cheap to close.

Advisory Across the Asset Life

Owners engage us at whichever stage they are at. Earlier is cheaper — but there is useful work at every point, including after an incident.

Stage 01

Technology Selection & Due Diligence

"We're down to three suppliers and their claims all look the same."

Independent technical due diligence on the systems you are choosing between: cell chemistry and provenance, fire-test evidence, protection architecture, and the credibility of the supplier's engineering — assessed side by side, against the standards your project must actually satisfy. The point is to make the differences visible before you are contractually committed to one.

Stage 02

Design & Documentation Review

"We have the drawings and the datasheets. Do they hold up?"

Review of battery system, BMS and protection logic, thermal management, enclosure, layout and separation, ventilation, detection and suppression — assessed against real fire and explosion failure modes rather than against a compliance checklist. We identify where the design depends on assumptions the evidence doesn't support.

Stage 03

Standards, Code & AHJ Readiness

"Will the authority having jurisdiction approve this — and what will they ask for?"

Assessment against NFPA 855, NFPA 68/69, UL 9540 and UL 9540A, IEC 62933 and 62619, and local code. Where a supplier's evidence was produced to a domestic standard in another market, we reconcile it against the benchmark your project has to satisfy — a gap that routinely surfaces late and expensively on imported systems.

Stage 04

Hazard Mitigation Analysis

"We've been asked for an HMA. What does it actually need to prove?"

Hazard mitigation analysis covering thermal runaway initiation and propagation, off-gas behaviour, deflagration venting and explosion control, and the detection and ventilation strategy that has to be consistent with them. Assessed as one connected system, because that is how it fails.

Stage 05

Factory Surveillance & Production Verification

"We're about to accept delivery. Does what's in the containers match what we bought — and what was tested?"

Battery systems are largely built offshore, and for most owners the first physical sight of the product is when it arrives on site. By then, acceptance has effectively happened.

We attend the manufacturer's facility on your behalf: reviewing the inspection and test plan and agreeing witness and hold points before production starts, conducting source inspection during the build, and witnessing factory acceptance testing. Critically, we verify that the units being produced match the configuration that was actually tested and certified — cell provenance and batch, bill of materials, protection and BMS firmware, and any component substitution made between the tested sample and the production run.

Found at the factory, a systemic defect is a rejected lot. Found at commissioning, it is a retrofit. Found in service, it is an outage and a warranty dispute.

Deliverable — Factory surveillance report: witnessed test records, conformance findings, non-conformances raised with the supplier.

Stage 06

Commissioning & Energization Readiness

"We energize next month. Is it actually safe to?"

Verification of as-built condition against design intent and the hazard analysis; validation of protection, detection, ventilation and suppression before energization; review of controls behaviour and operating protocols against real failure modes.

Stage 07

Operations, Assurance & Re-Assessment

"It's been running two years. Does it still meet the case we financed it on?"

Point-in-time, data-driven health assessment of operational systems — assessment, not real-time monitoring. Review of BMS and controls behaviour, operating and emergency response protocols, and maintenance practice. Re-assessment after field modifications, repowering, capacity augmentation, or a reported event.

Stage 08

Incident & Forensic Investigation

"Something happened, and we need to know why."

Independent root-cause investigation by CFEI-certified fire and explosion investigators — after an incident, near-miss, warranty dispute, or non-conforming test. Findings are evidence-grounded and built to hold up with AHJs, insurers, and in subrogation or warranty recovery.

Handled by our forensic practice, MC Forensics →

The cost of a finding rises at every stage. The leverage is at the front.

Evidence Your Lenders and Insurers Will Accept

Technical findings only matter if the people funding and covering the asset accept them. Several of our engagements exist specifically to produce that evidence.

Lender's & Investor's Engineer

Independent technical review supporting financing, drawdown, or acquisition of a project or portfolio.

Insurability & Risk Assessment

Assessment mapped to what underwriters actually ask for, so risk is priced on evidence rather than on assumption.

Owner's Engineer Through EPC Delivery

Sustained owner's-side technical oversight across a project, rather than a single report.

Dispute, Warranty & Non-Conformance

Independent technical position where a supplier's performance or a non-conforming test result is contested.

What We Assess

Breadth is only useful if the depth is real. Across every stage above, these are the things we look at directly.

Battery & Failure Behaviour

Battery cells, modules & chemistry
Off-gas, fire & explosion behaviour
Thermal runaway & propagation
Deflagration venting & explosion control

Protection, Controls & Thermal

BMS & protection logic
Controls, EMS & communications
Thermal management & coolant systems
Power conversion & grid interface

Enclosure, Detection & Site

Detection, suppression & ventilation
Enclosure, layout & separation
Site layout, separation & access
Emergency response & first-responder planning

Evidence, Compliance & Readiness

Large-scale fire-test evidence
Standards & code compliance (UL / NFPA / IEC)
Commissioning & energization readiness
Root-cause & failure-mode analysis

A Methodology, Not a One-Off Report

Our licensed team applies a proprietary risk-assessment methodology built specifically for battery fire and explosion risk across the asset life. You get a structured technical report with a prioritized gap register: every finding rated, tied to the standard or failure mode behind it, and paired with a recommendation — written to be handed directly to a lender, insurer, or AHJ.

Documentation & Design Review

As-supplied · pre-deployment · at the manufacturing source

Verify the fire-test programme demonstrates non-propagation to the standards the project must satisfy
Review BMS protection, thermal management, and enclosure / venting design against fire and explosion failure modes
Verify explosion-control design is supported by the system's off-gas behaviour
Reconcile domestic-standard test evidence with the international benchmarks the project must satisfy

DeliverableStructured technical report: prioritized fire-risk gap register with recommendations.

Facility & Operational Review

As-built · operational · on site and in service

Verify as-built condition against design intent and the hazard analysis
Commissioning-stage validation of protection, detection, ventilation and suppression before energization
Review BMS / controls behaviour and operating protocols against real failure modes
Re-assess after field modifications, repowering, or a reported event

DeliverableStructured technical report: as-found risk against target, prioritized gap register with recommendations.

Owner-Side Only, by Construction

Truly Independent

No equipment, design, or construction conflicts. Our only obligation is to the owner and the asset's safety.

Licensed & CFEI-Certified

Licensed engineers plus certified fire and explosion investigators, across electrical, controls, and forensic disciplines.

Proprietary Risk Methodology

Purpose-built for BESS risk, surfacing propagation, deflagration, and controls gaps a compliance review misses.

Standards-Led

UL 9540A, NFPA 855, NFPA 68/69, IEC 62933 — the benchmarks lenders and insurers apply.

Assess & Investigate

Prevention up front, forensic root cause if it fails. Both sides of the risk, one partner.

No Engineer of Record

MCE does not design, build, or operate. Findings serve one interest: the owner's.

Who We Work For

Owners & OperatorsDevelopers & IPPsFinanciers, Lenders & InvestorsInsurers & BrokersData-Centre OperatorsEPC ContractorsAHJs & Regulators

Frequently Asked

Our supplier's system is UL 9540A tested. Isn't that enough?

A test report proves what happened to a specific configuration in a specific test. It does not prove that the units you receive match that configuration, that your explosion-control design suits the off-gas behaviour the test recorded, or that the evidence satisfies the standard your AHJ, lender, and insurer apply. The gap between "tested" and "compliant as built" is where most of the risk sits.

When should we bring you in?

As early as technology selection. The cost of a finding rises sharply at each stage: at due diligence it is a negotiating point, at design it is a revision, at factory it is a rejected lot, at commissioning it is a retrofit, and in operation it is an outage. There is useful work at every stage — but the leverage is at the front.

How is this different from our engineer of record?

The engineer of record is accountable for the design and carries an interest in it. We hold no design, supply, or construction stake, so our assessment answers to the owner alone. The roles are complementary, not competing.

Do you monitor our system?

No. Our operational review is a point-in-time, data-driven assessment, not real-time monitoring. We tell you where the system stands as found and what needs to change.

What do we actually receive?

A structured technical report with a prioritized gap register — each finding rated, tied to the standard or failure mode behind it, and paired with a recommendation. It is written to be handed directly to a lender, insurer, or AHJ.

Ready to De-Risk Your Battery Storage?

Independent · Canadian-registered · Serving battery-storage projects worldwide

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MCE provides independent, owner's-side advisory and assessment. MCE does not design, build, operate, or act as engineer of record.