Prioritizing the Punchlist: How better data drives decision-making at scale

In TWAICE's 2026 survey of 117 BESS professionals, 90% said unplanned maintenance has cost them revenue, and 47% struggle to hold suppliers to their performance promises.

Practitioners need to understand and demonstrate fault sequencing, and observe the impact of firmware updates. They need to know if PCS power-sharing settings are increasing power availability at the expense of energy delivery.

They need evidence for serial defect claims, a start date for mutually deferred actions, and a price tag and a deadline for all of it. Performance engineers identify the delta, O&M defines the schedule, and asset management finds the cash to cover it.

Speakers

• Rowan Obenshain, BESS Engineer, TWAICE: previously Technical Expert (GTEC) at Wärtsilä

• Chris Pickett, Sr. Solutions Engineer, TWAICE: BESS expert from design to deployment; formerly led PRYSM Sustainable Solutions and held Director roles at Fractal Energy Storage Consultants.

What you'll take away:

• Finding the first domino. Many alarms can have one root cause. Look for the earliest abnormal signal, not the loudest alarm.

• Quantifying the impact. Measure capacity lost, downtime and penalties to rank faults to fix first.

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