Commercial Solar I-V Curve Tracing
Learn what an I-V curve can reveal about DC performance, what it cannot prove alone, how field conditions affect the comparison, and what belongs in an owner-ready report.
Read the I-V curve guide ↗Field-informed solar O&M guidance
Better evidence.
Better asset decisions.
Practical guidance for California commercial and agricultural solar owners—from performance metrics and fault response to contracts, reporting, diagnostics, and regional operating conditions.
01 Latest insights
Start with the operating evidence
Understand the signal.
Choose the right next step.
Thermal Drone Scans for Solar Panel Hot Spots
Learn what aerial thermography can reveal, why a hot spot is not a root-cause verdict, and what belongs in a decision-ready report.
Read the thermal drone guide ↗7 Signs Your Solar Array Is Underperforming
Learn which warning signs deserve investigation, how monitoring problems can imitate equipment problems, and what evidence to gather before dispatching field service.
Read the performance guide ↗8 Central Inverter Failure Modes to Catch Early
Review the symptoms, first checks, and prevention priorities that help owners move from a fault code to a disciplined diagnostic plan.
Read the inverter guide ↗Solar Performance Ratio vs. Availability
Learn why a highly available array can still underperform, what each KPI measures, and how owners can use both without mistaking one for the other.
Compare the KPIs ↗Solar Monitoring Offline: Data or Equipment?
Separate a communications or data-path failure from an actual production outage before deciding what needs remote review or field service.
Read the monitoring guide ↗Solar Ground-Fault Alarms
Understand why a recurring ground-fault alarm requires qualified investigation and why restoring operation is not the same as correcting the cause.
Read the ground-fault guide ↗End-of-Warranty Solar Inspection
Build a documented condition and performance record before coverage expires, then move confirmed findings into timely warranty or corrective action.
Plan the inspection ↗Commercial Solar O&M Contract Checklist
Compare scope, exclusions, response priorities, reporting, parts, warranty support, and closeout before selecting an operating partner.
Review the contract checklist ↗Owner-Ready Solar Asset Reporting
See what a useful report should show about energy, availability, losses, open issues, work status, costs, and the decisions ownership needs to make.
Build a better report ↗Central Valley Solar O&M
Plan service around heat, dust, irrigation schedules, agricultural access, remote sites, and the operating evidence that should drive field priorities.
Read the Central Valley guide ↗Central Coast Solar O&M
Account for site-specific moisture, salt, agricultural contaminants, corrosion, drainage, and coastal operating conditions without assuming every site is the same.
Read the Central Coast guide ↗Have a performance question?
Start with
12 months of data.
Send production history, inverter events, and the operating context. TerraSun will help identify the most practical next diagnostic step.
Request a free analysis ↗Or call (855) 65-TERRA