
ACTIVE ASSET MANAGEMENT AND
PORTFOLIO OPTIMISATION
During the period, the Investment Manager,
working closely with the Board and led by its
internal asset management team, progressed
a structured programme of operational
initiatives designed to reduce unscheduled
outages, strengthen contractor oversight and
improve asset reliability across the portfolio.
PORTFOLIO-WIDE
– Continued proactive oversight of O&M
subcontractor performance across the
portfolio, with particular focus on outage
responsiveness, work prioritisation, and
reporting standards. This included the
recontracting of O&M arrangements
across the portfolio, consolidating
activities from five providers to two
preferred subcontractors selected based
on their consistently strong operational
performance. The long-standing
contractor for the Euryalus portfolio
was recontracted and expanded to
cover Milford and the Olympos portfolio
following the expiry of prior agreements,
while the internal asset management
team supported the ramp-up and
stabilisation of the newly appointed
contractor across the Heelstone and
Granite portfolios
– Enhanced portfolio-wide data collection,
analytics and management tools to
improve visibility and decision-making.
During the period, the internal asset
management team initiated a review of
asset performance index methodologies
and related monitoring tools to reduce
inconsistencies between reported data
and on-site performance, strengthening
oversight and internal reporting
– Improved site-level controls to enable
increased remote troubleshooting and
diagnostics, reducing reliance on on-site
interventions, lowering O&M costs and
minimising availability impacts from
equipment resets
– Advanced implementation of a refreshed
spare parts strategy aimed at improving
inverter reliability and reducing outage
duration. While supply chain constraints
and import volatility resulted in some
delays, improved spare parts planning and
deployment enhanced response times to
technical outages across the portfolio
– Secured renewal of portfolio insurance on
competitive terms (including pricing and
coverage), following proactive engagement
with brokers and underwriters, including
site visits and detailed risk reviews
Theoutcome reflects the effectiveness of
the Investment Manager’s risk mitigation
strategies and supports continued
financial resilience across the portfolio
SITE-SPECIFIC
– Completed a comprehensive options
analysis across seven assets identified
as potentially benefiting from capital
investment initiatives to rectify ongoing
causes of underperformance. Capital
initiatives at Granger and Valley Center,
involving the replacement of existing
inverters with units from an alternative
supplier not subject to the same trade
and import constraints, were approved
and completed during the period,
resulting in materially improved operating
performance at both sites. At Chiloquin,
works to relocate above-ground project
feeder lines to address recurring ground
faults and rodent-related damage were
approved and commenced during the
period, with completion expected in 2026
– Implemented enhanced site security
measures at select North Carolina sites,
including 24-hour site monitoring, co-
ordination with local law enforcement task
forces and engagement in community-
based deterrence initiatives. No material
theft events were recorded at these sites
during the second half of2025
– Strengthened performance optimisation
efforts through systematic monitoring of
site soiling levels to trigger timely module
cleaning, with a particular focus on the
Company’s North Carolina assets. Panel
washing undertaken at the Olympos
and Granite portfolio during the period
delivered performance improvements
inline with expectations
– Established and expanded relationships
with qualified third-party service
providers to maintain, repair and
troubleshoot equipment no longer
supported by original equipment
manufacturers, reducing dependency
risk and improvingresponseflexibility
– Assessed the inverters that were
replaced at Granger and Valley Center
and redeployed into the portfolio’s spare
parts inventory, providing additional
contingency coverage for Sedberry
and Tiburon, reducing reliance on new
equipment procurement and improving
long-term operational resilience through
efficient capital utilisation
Collectively, these asset-specific initiatives
reflect a disciplined and targeted approach
to addressing the underlying causes of
underperformance. While remediation efforts
are ongoing and not all benefits have yet
been fully reflected in generation outcomes,
the actions undertaken during the year have
strengthened operational oversight, reduced
structural risks and positioned the portfolio for
more consistent performance goingforward.
2026 PRIORITIES
– Actively manage and support the
ramp-up of newly appointed O&M
subcontractor for Milford and the
Olympos portfolios as technical staff
become familiar with asset conditions,
focusing on consistent execution
standards, faster outage responsetimes
andreduced performance variability
– Continue strengthening in-house
technical capability through
targeted training with key equipment
manufacturers, reducing reliance on
external OEM support and lowering
corrective maintenance costs
– Capture operating efficiencies through
disciplined planning and execution
of field activities, optimising truck-roll
deployment to reduce response times
and minimise unnecessary site visits
– Maintain a structured preventative
maintenance programme,
proactively sequencing works to
maximise equipment availability and
minimise downtime during peak
productionperiods
– Further enhance data collection,
analytics and performance reporting
to improve weather-adjusted
monitoring, support root cause
analysis and inform more effective
prioritisation of O&M resources
– Continue implementation of the
refreshed spare parts strategy to
improve component availability and
reduce outage duration, particularly
for critical equipment
– Sustain enhanced site security and
risk mitigation measures to minimise
the likelihood and impact of theft-
related disruption
– Maintain proactive engagement with
insurance brokers and underwriters,
supported by continued risk mitigation
initiatives and site-level reviews, to
position the portfolio for renewal of
insurance on competitive pricing
andcoverage terms
27
US Solar Fund plc
Annual Report and Financial Statements 2025
OVERVIEW STRATEGIC REPORT CORPORATE GOVERNANCE FINANCIAL STATEMENTS