Yield Assessment
Yield reports for the planning and evaluation of photovoltaic systems (with and without storage)
A reliable yield forecast that is accepted by banks and investors as well as technical consultants is required for the planning and financing of your solar energy system. With well-founded expertise and years of experience, we realistically calculate your expected yields and prepare them in the form of yield reports suitable for banks.
Frequently asked questions (FAQ) about yield reports
A yield report is used to determine the system performance. The expected amounts are calculated on the basis of meteorological conditions, topography, irradiation, shading, terrain, the performance of the system including the selected technical components.
A yield report is essential for planning and financing a PV system. It must provide reliable statements about the economic viability of a photovoltaic system in order to be accepted by banks, investors and technical advisors alike. It is used both in the planning phase and at a later stage, e.g. when planning to sell or to review an existing report from another source.
A yield forecast simulates the expected yields of a PV system planning. Main components such as modules and inverters as well as the arrangement/inclination/orientation of the modules are taken into account, certain assumptions are made regarding losses and the results are presented briefly or in the form of a simulation report, but usually no expert report is prepared. Instead, it is possible to compare different constellations with each other by varying individual components or assumptions. In this way, optimised yields or optimised area utilisation can be achieved in accordance with the customer’s wishes.
The costs for a yield report vary depending on the scope and effort involved. Specific offers can be requested without obligation.
The duration of a yield report depends on the size and complexity of the PV system and, of course, on our current capacity utilisation. As a rule, we need 3-4 weeks to prepare a yield report. In urgent cases, a report can be prepared within 10 working days as a matter of priority.
To process a yield simulation, information on the system location and the module arrangement and orientation is required as a minimum. The module type/number and inverter type/number should be specified. Depending on the project (ground-mounted or rooftop system), further information on the arrangement of the modules on the substructures may be required.
Assumptions for yield reports
Missing details can be replaced by assumptions and we determine local conditions and the shading situation ourselves. This usually does not require an on-site inspection, but we are also happy to offer one. In this way, yield forecasts can be prepared at a very early planning stage. The expert opinion usually only makes sense once a rough plan is ready for approval. As soon as the planning is finalised, the report can be adapted with little effort.
Requirements from banks or investors
Objective yield reports are often requested by the financing party. If special values are required (e.g. the disclosure of certain probabilities for the achievement of specific returns and performance ratios within a defined period), we can determine these and present them in the report. Our reports are accepted by the banks and can therefore be used for financing enquiries.
Meteorological data
Estimating future irradiation and temperatures is particularly important for yield simulations. For this purpose, we determine long-term monthly averages of irradiation and temperature from the last 10-20 years from various sources, evaluate and compare them and select a suitable data set. The assumption is then that irradiation and temperature remain the same during the operating time of the PV system and that deviations are expressed in the uncertainty of the results. However, it is also conceivable to present a more conservative or more optimistic approach in addition to the selected irradiation/temperature forecast.
German or English?
Of course, our reports can be prepared in German and also in English.
Simulation software
We create yield simulations with the latest PVsyst version, whereby planning files (e.g. from Helios 3D or PVcase) can be imported. A detailed 3D scene is created for all simulations.
