Percentages and energy totals answer different questions
When a solar report displays PR, or Performance Ratio, beside energy output, do not select a proposal solely because its percentage is higher. PR is a ratio-based indicator, while kWh describes an energy quantity over a stated period. Two systems can therefore rank differently on these measures. Request the report and clarification of the system sizes, locations and periods being compared.
Understand the reference denominator
PVsyst describes PR as comparing produced or usable energy with reference energy based on irradiation in the array plane and nominal power at STC. The energy definition depends on system type. It is therefore neither module efficiency itself nor the percentage reduction in an electricity bill. Before using figures from two reports, ask which energy field is used and whether both use the same PR definition, especially with self-consumption or storage.
Compare a ratio with an amount using hypothetical figures
Suppose system A has 100 units of reference energy on an agreed basis and 80 units of energy for comparison, producing a ratio of 80%. System B has a reference of 200 units and energy of 150 units, producing 75%. A has the higher ratio, but B has more energy. This example explains ratios only; it is not simulation output or a real project, and does not establish which system suits the building or offers better value.
Distinguish simulation from measured results
Identify whether a reported PR comes from a model or measured data. For measurements, establish the irradiance data source, energy measurement point and matching period. PVsyst emphasizes the reference irradiance and synchronization of data. Do not compare sensor data from different periods or incomplete reports without recording their limitations. Mark gaps explicitly rather than treating missing values as zero.
A changed percentage calls for an evidence-based explanation
If this month's PR differs from last month's, request the inputs, aggregation method and recorded system events before concluding that equipment has degraded or a repair improved performance. One number does not identify a specific cause by itself. If a contract guarantees PR, read its definition, assessment period and exclusions separately. A result below a simulation does not automatically establish a right to claim.
Turn the report into project questions
Before discussing a project with Kintury Energy, prepare the report pages showing PR, energy yield, installed size and data sources. Clarify whether your question concerns design suitability or actual operation. Ask the report author to explain the comparison basis before using the numbers in financial calculations. Reading PR together with energy quantities improves understanding but does not guarantee output, savings or project value.
