Quality Assurance

Independent BESS quality assurance, powered by factory (FAT) data.

ACCURE benchmarks factory acceptance test (FAT) data against your contract to verify battery compliance and flag non-conformities before shipment, not after.

Find the issues before they become your problem.
Challenge

A defect caught in the factory costs a fraction of one caught on-site.

A single faulty cell, a loose busbar or a mis-tuned BMS can tip a plant from profit to problem. Thermal runaway, capacity fade and uneven ageing hide behind the spreadsheets. Only end-to-end, data-rich QA across cells, racks, electronics and communication protects both safety and investor returns long after the factory shine wears off.

BESS quality assurance services we offer.

ACCURE's independent battery quality assurance analytics benchmark your suppliers' factory data against contract, drawing on 24+ GWh of supported capacity across 100+ sites worldwide.

Factory Acceptance Testing planning and execution

We plan and support Factory Acceptance Tests (FAT), developing checklists, inspection test plans and acceptance criteria, then analysing the resulting FAT data to verify battery compliance before equipment leaves the factory.

Problem identification and resolution

During FAT we review audit documentation and analyse measurement data to identify non-conformities, working with the engineering and manufacturing teams to resolve them before shipment.

Reporting and approval

ACCURE consolidates all test data, deviations, root-cause analysis and corrective actions into structured reports, and presents findings to your stakeholders to secure sign-off for shipment and installation.

Non-conforming cells caught before shipment.

Challenge

A European BESS developer asked ACCURE to verify a shipment of prismatic LFP cells against a strict quality plan before delivery.

ACCURE insights

Within a few hours, ACCURE’s cloud-based FAT benchmarked the factory data against the contractual specification and flagged two major non-conformities:

Capacity consistency – the total spread was 1.7 % (limit ≤ 1 %), with only 57 % of cells meeting the requirement.

DCIR omission – the supplier did not measure direct-current internal resistance at all, leaving a critical safety and performance metric unverified.

Alternating-current resistance (ACIR) was the only parameter both measured according to the test plan and found to be in spec.

Outcome

The lot was rejected prior to shipment, avoiding downstream risk and giving the developer leverage to secure a fully compliant replacement batch.

“ACCURE has provided us with the visibility we needed into the performance of the batteries, empowering us to take a data-driven approach to our asset management and make better operational decisions.”
Rory Elston
Head of Operations, Energy Storage
Pacific Green
The Battery Journey

ACCURE’s independent experts guide you through the entire battery journey—from procurement to day-to-day operation and beyond. Our data-driven software and services cut risk, raise performance, and protect your investment. Armed with insights from live assets spanning every major vendor, region, and use case, we meet you where you are and move your program forward with confidence. Explore the stages below to see how we add value at every milestone of the battery lifecycle.

Procurement

Contracts often lack teeth. Vague warranties, unclear performance guarantees, and loosely defined LTSA terms leave stakeholders without real leverage when things go wrong. Bring clarity to your contracts.

Quality Assurance

Rapid manufacturing scale-up often comes at the cost of consistency. New production lines are especially prone to variability. Hidden defects and uneven component quality can cause issues years after COD. Identify problems early, before they cause headaches.

Commissioning

Critical issues go undetected until it’s too late. Teams scramble to resolve problems during site testing—jeopardizing timelines, delaying COD, and eroding confidence. Pinpoint problems to protect timelines.

Operations

Limited visibility during operations leads to missed issues, unexpected downtime, and reduced performance as systems age and usage patterns shift. Turn data into action with predictive battery analytics.

Augmentation

Technology is evolving fast—and so are markets. New hardware iterations and shifting revenue streams make long-term planning uncertain, reactive, and risky. Long-term success demands strategic adaptability.

See how we can help you navigate the complexities of the battery journey.
Talk to an expert

How we help with BESS quality assurance.

ACCURE pairs independent analytics with performance engineers to plan, support and report on FAT before equipment ships. We benchmark factory data against your spec, resolve non-conformities with the supplier and produce a defensible record, catching the costly defects early and keeping your programme on track.

Related Resources
Guide to Factory Acceptance Tests
Read more about how FAT impacts long-term battery health

FAQs

What does independent BESS factory acceptance testing detect?

ACCURE applies advanced algorithms to the full docket of FAT measurements, well beyond the typical line-by-line spec check, detecting capacity, imbalance, thermal, communication and system-level non-conformities that a manual review cannot surface. These are the defects that are far costlier to fix on-site, so catching these before equipment ships can dramatically reduce OpEx.

Why catch defects before shipment?

A defect caught in the factory costs a fraction of the same defect caught on-site, where it can delay commissioning, trigger disputes and erode investor returns.

 Is ACCURE independent of the supplier?

Yes. ACCURE is independent and OEM-agnostic, giving you an objective check on supplier claims.

Does ACCURE replace a physical factory audit?

ACCURE's quality assurance is analytics-led: we benchmark and validate factory and FAT data against your specification and support FAT execution. This complements rather than replaces a full physical factory audit.

What data does ACCURE analyse for quality assurance?

Factory and FAT test data spanning cells, racks, power electronics and communications, benchmarked against your contractual specification.