--- title: "Evaluate add-on services" slug: "evaluate-add-on-services" updated: 2026-09-24T09:29:42Z published: 2026-09-24T09:29:42Z canonical: "kb.solargis.com/evaluate-add-on-services" --- > ## Documentation Index > Fetch the complete documentation index at: https://kb.solargis.com/llms.txt > Use this file to discover all available pages before exploring further. # Evaluate add-on services **In this document** You'll learn what each Evaluate add-on service delivers — site adaptation, quality control and harmonization of ground measurements, ground surface albedo services, PV energy yield evaluation, historical forecast, consultancy support, and soiling loss assessment — and how to request one for your project. Evaluate application **add-on services** enhance project assessment capabilities by introducing specialized services and expanded datasets. They were created to provide deeper insights through higher resolution data processing, supplementary albedo measurements, or customized consulting services. Services are requested per project and quoted individually. For additional **datasets** rather than expert services, see [Evaluate add-ons](/v1/docs/evaluate-data-add-ons). ## Prerequisites - Active Solargis Evaluate subscription. - Admin access for editing purposes. ## Available add-on services ### Site Adaptation of Solargis Model Data Solargis uses your ground measurements of solar resource to adapt our satellite-based solar resource model, delivering a dataset with reduced uncertainty and improved accuracy for site-specific conditions. The bankable solar resource assessment report covers quality control of the measurements, model adaptation, and site solar resource statistics. ### Quality Control of Ground Measurements Solargis checks the quality of your ground measurements of solar resource and meteorological parameters. Using a rigorous multi-level quality control approach, we flag issues in the data and deliver an error-free dataset suitable for analysis and decision-making. ### Harmonization of Ground Measurements Solargis checks the quality of your ground measurements of solar resource and meteorological parameters, then merges data from multiple sensors into a single, gap-free, validated, and bankable dataset, especially useful for PV power plant performance evaluation. ### Ground Surface Albedo Time Series Daily-resolution time series of ground surface albedo, derived from MODIS and VIIRS satellite data and Solargis solar radiation models. The report analyzes albedo variability and provides more accurate long-term average albedo values, especially important for bifacial PV simulation. ### Site Adaptation of Ground Surface Albedo Time Series Using your ground albedo measurements, Solargis adapts the satellite- and model-derived albedo time series to improve accuracy and site representativeness. The report analyzes geographic and temporal albedo variability and provides long-term average values, critical for bifacial PV yield simulation. ### Spatial and Temporal Evaluation of Ground Surface Albedo Solargis experts analyze albedo variability across your project area over the available data period. The report identifies distinct zones with different albedo patterns, describes trends, and provides long-term average albedo values per zone, especially critical for large sites and bifacial PV yield simulation. ### Evaluation of PV energy yield Some projects need special tools and extra expertise, not standard methods. Solargis Consultancy can help with hybrid PV+BESS projects, very large projects, complex site layouts, and detailed variability analysis using data as precise as 1-minute intervals. This service is for projects where standard tools are not enough. We make sure you get reliable results, even for the most difficult cases. ### Historical Forecast Solargis Forecast data covering the past two calendar years, with customizable forecast horizons and issue times, plus a forecast accuracy report. Essential for modeling, sizing, and optimizing PV and BESS systems, as well as commercial planning for energy trading and grid penalty minimization. ### Consultancy Support for Complex Photovoltaic Projects Solargis Consultancy brings specialist tools and expertise to complex projects with custom requirements, for example hybrid PV+BESS projects, extremely large projects, complex topologies and layouts, or custom variability evaluation using input data at up to 1-minute resolution. ### Site Assessment of Soiling Losses Solargis assesses long-term soiling losses at your site using our soiling loss model. If you provide on-site soiling measurements, we quality-control them and use verified data to adapt the model to local conditions. Delivers a daily soiling loss time series and monthly long-term averages with comprehensive statistics, ready for direct use in PV yield simulation. ## Requesting an add-on service You can request add-on services using the **Data & services** page: 1. Go to **Data & services**. 2. Switch to the **"Solargis services"** tab. 3. Click the **“Request a proposal”** or **”Activate”** button of the service you want to request and follow on-screen instructions. ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-UVATJO5X.png?sv=2026-02-06&spr=https&st=2026-10-16T21%3A17%3A11Z&se=2026-10-16T22%3A17%3A11Z&sr=c&sp=r&sig=BT%2F%2BRKMTdWcN1nRxJf9yY%2BI3h%2BgbqoSUbEQWa0XH54M%3D) > [!TIP] > **Note**: System will send notifications about the progress of your request to your registered email. ### Tracking the progress of requested services Every requested service shows its request date and status. ![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-7Y2J024P.png?sv=2026-02-06&spr=https&st=2026-10-16T21%3A17%3A11Z&se=2026-10-16T22%3A17%3A11Z&sr=c&sp=r&sig=BT%2F%2BRKMTdWcN1nRxJf9yY%2BI3h%2BgbqoSUbEQWa0XH54M%3D) ### Downloading delivered non-data source documents Non-data source documents requested via the Solargis services can be downloaded directly from the Solargis services page (download button next to the service).