Senior Performance Engineer

Job Summary The Senior Performance Engineer is responsible for expected-versus-actual energy performance across SunStrong’s serviced fleet, spanning residential systems, commercial and industrial sites, community solar, and utility-scale projects.

This role models production, quantifies and defends contractual performance obligations, and drives underperformance to root cause with operations and field services.

As the senior technical authority on fleet performance, the position sets the data requirements behind performance reporting, advises on dashboard and analytics development rather than building it, and partners with asset management and O&M on billing and settlement accuracy.

The role sits on the Fleet Management Technology team and requires equal comfort with a residential inverter fleet, a metered utility-scale PPA settlement, and the data platform that carries both.

Responsibilities

Model and monitor energy performance across residential, C&I, community solar, and utility-scale assets in PlantPredict and the fleet monitoring platforms (AlsoEnergy, Power Factors, 3E), comparing metered production against simulation using weather and irradiance data from Solcast, SolarAnywhere, and Open-Meteo.

Calculate and defend contractual performance metrics including availability, performance ratio, production guarantees, and liquidated damages exposure, and produce the recurring analysis that supports billing, PPA and lease invoicing, and investor and securitization reporting.

Evaluate billing and settlement accuracy with the asset management and O&M teams, reconciling metered, monitored, and invoiced quantities and resolving discrepancies at the source.

Investigate underperformance to root cause across inverters, meters, communications, energy storage, and site conditions, and drive corrective work to closure with O&M and field services. Direct the data requirements for fleet performance — tags, granularity, units, timestamps, and quality rules — and support data coll