Solar Energy Performance Reconciliation

Solar Performance Reconciliation helps you make sure existing projects are operating at optimum levels, diversify your portfolio of assets, and manage your pipeline of proposed sites.

Vaisala delivers an updated solar irradiance and weather time series at either a single project or across your entire portfolio of locations. Time series easily integrate into your own internal processes and are based on our regularly updated global solar dataset, which includes nearly two decades of hourly solar values.​​​​​


Vaisala's 3TIER Services produced the first global solar irradiance map and time series dataset at roughly three times the resolution of previous U.S. solar datasets and at thirty times the resolution of global datasets available from NASA and continuously updated. Based on almost two decades of satellite imagery and cutting-edge technology, our uniform methodology is supported by a large scientific and research community.

The dataset is based on actual, quarter- or half-hourly, high-resolution visible satellite imagery observations via the broadband visible wavelength channel at a 2 arc minute resolution. These data have been processed to hourly GHI, DNI, and DIF values. Vaisala processes the satellite images based on a combination of in-house research and algorithms published in peer-reviewed scientific literature. These algorithms contain parameters and coefficients that are based on empirical fits to observational data. Weather variables are gathered from the ECMWF forecasting grids available globally. ​​

Regions Satellites Temporal Coverage
Western Hemisphere GOES 8 - 14 January 1997 - last month
South Asia & Middle East Meteosat 5, Meteosat 7 January 1999 - last month
East Asia & Oceania GMS 5, GOES 9, MTSAT 1-2, Himari-8 December 1998 - last month
Europe & Africa Meteosat 7, Meteosat 9-10 July 1998 - last month


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Key Benefits

Optimize operations
Once a project is built, it is critical to monitor how it is performing compared to initial projections. Weather-adjusted production information makes it possible to understand when over or underperformance is caused by environmental conditions, ongoing equipment issues, or a simple lack of maintenance. Recognizing and resolving underperformance issues as early as possible helps maximize energy production, optimize operations, and proactively restructure financial and capacity obligations.
Manage your project pipeline
What if you had nearly two decades of data at all of your development sites? In the assessment phase, Solar Performance Reconciliation enables you to know earlier which sites are most promising and regularly evaluate and re-prioritize your entire portfolio of projects. Now you can justify investments and base vital decisions about capital deployment, equipment choices, and project priorities on scientifically-derived data at near real-time.​​
Easily integrate data
Solar resource information is delivered for each location via a data file in an easily integrated CSV file format either via FTP or API.