Solar generation can change rapidly as cloud cover, irradiance, snow cover, sun angle, and regional asset distribution interact. AG2 Solar Power Forecasts translate those weather signals into actionable generation guidance, helping energy professionals anticipate renewable supply, residual demand, ramp risk, and changing grid conditions.
AG2 provides solutions tailored to the different structures and data needs of European and North American power markets.
Turn Changing Sky Conditions into Actionable Power Intelligence
Solar production is not simply a function of whether the day will be sunny or cloudy. The location, timing, thickness, and movement of cloud cover can create meaningful generation differences within the same power market.
AG2 helps users move beyond raw weather information by connecting model guidance with expected solar generation. Traders, schedulers, analysts, utilities, and risk teams can identify when solar output may diverge from expectations, determine where the change is occurring, and understand how it may affect net load and market exposure.
Within AG2 Trader, solar forecasts can be viewed alongside wind, demand, temperature, precipitation, and meteorologist insights, supporting a more complete energy-market workflow. AG2 Trader is designed to combine global information, customizable displays, and market-relevant weather intelligence in one platform.
European Solar Power Forecasts
Country-Level Solar Guidance from the Models Driving European Markets
European solar power forecasts are included with an AG2 Trader subscription, giving users a direct view of expected solar generation across European countries.
Like the European wind product, these forecasts are based on individual weather-model solutions rather than a separate proprietary AG2 generation forecast. Users can compare how different models translate future cloud and irradiance conditions into expected solar production and identify where model disagreement may create uncertainty.
Key Features
Country-level forecasts
Monitor expected solar power for individual European countries within one global weather and energy platform.
Individual model guidance
Compare solar generation forecasts based on the weather models most closely followed by European energy markets.
Model Comparison
Identify where forecasts agree, where they diverge, and how expected solar generation changes as new model runs arrive.
Integrated with AG2 Trader
View solar forecasts alongside temperature, wind, precipitation, forecast trends, and commentary from AG2 meteorologists.
Clear visual analysis
Use interactive charts and tables to quickly recognize high-production periods, low-generation risk, and meaningful forecast changes.
Best For:
- European power traders
- Energy-market meteorologists
- Renewable-energy analysts
- Utilities and portfolio managers
- Teams evaluating country-level solar supply risk
Compare model-driven solar power forecasts across European countries, all within AG2 Trader.
North American Solar Forecasts
AG2 provides proprietary solar generation forecasts for CAISO, ERCOT, and PJM, with each product tailored to the structure and needs of its market.
CAISO offers aggregate and subregional solar guidance integrated with wind, load, and net load forecasts. ERCOT provides 15-day hourly forecasts for the ISO total and six load zones. PJM delivers five-day aggregate and subregional forecasts, estimated observations, and measurable accuracy improvements over the PJM benchmark.
Together, the products help users understand not only how much solar generation is expected, but where it is changing and how that change may affect net load and market conditions.
What All Three Have in Common
AG2’s CAISO, ERCOT, and PJM Solar Forecasts all convert weather-driven solar conditions into expected generation, helping traders and analysts anticipate renewable supply, net load, and market risk.
Across all three markets, the products provide:
- Independent AG2 solar generation forecasts
- Regional or subregional visibility beyond a single market-wide number
- Integration with AG2 wind and demand forecasts to support net load analysis
- Access through AG2 Trader, with data-delivery options available depending on the market
- Weather-informed modeling that accounts for factors such as cloud cover and solar irradiance
CAISO Solar is part of AG2’s broader CAISO analytics suite. The new solar model is available for the CAISO Aggregate and all subregions and combines with upgraded wind and load forecasts to produce net load forecasts. The updated interface also displays CAISO’s Day-Ahead Forecast through seven days.
ERCOT Solar provides hourly forecasts through Day 15 for the six ERCOT load zones and the ISO total. The forecast updates hourly and gives users an independent alternative to ERCOT’s own solar forecast, with a longer horizon designed to support near-term and balance-of-month decisions.
PJM Solar provides forecasts for the PJM Aggregate and the Mid-Atlantic, South, and West subregions, along with estimated solar observations. AG2 forecasts extend through Day 5, compared with PJM’s two-day window, and showed a 17.8% Day 2 daytime MAPE improvement over the PJM benchmark.
See What an Aggregate Forecast Can Hide
Regional solar deviations can offset one another within a single ISO-wide number. Strong solar performance in one subregion may mask cloud-driven underperformance elsewhere.
AG2’s subregional forecasts help users determine:
- Whether a forecast deviation is localized or widespread
- Which part of the ISO is driving the aggregate change
- Where cloud or irradiance risk is emerging
- Whether regional renewable supply could affect residual demand
- Where ramp or congestion exposure may develop
The PJM white paper’s regional analysis shows distinct forecast-skill profiles for the PJM Aggregate, Mid-Atlantic, South, and West, reinforcing why solar conditions should not always be evaluated through one aggregate curve.
Hyperlocal Solar Intelligence with GRAF
For short-range weather analysis, users can supplement solar generation forecasts with high-resolution GRAF guidance.
GRAF provides:
- 4 km global resolution
- Global horizontal irradiance information
- Forecasts through 72 hours
- Hourly model updates
- Localized insight into cloud coverage and developing storms
The visual display and color coding make it easier to identify local cloud or convective features that may affect solar production.
Product Benefits
Anticipate Solar Supply Risk
Identify when changing clouds, irradiance, or local weather may cause generation to rise or fall relative to expectations.
See Where the Risk Is Developing
Use zonal and subregional guidance to understand which areas are driving a market-wide change.
Prepare for Solar Ramps
Recognize potential production increases or decreases that may alter residual demand and dispatchable generation needs.
Compare Independent Forecasts
Evaluate AG2 guidance alongside available ISO forecasts rather than depending on one forecast source.
Connect Solar to Net Load
Bring solar, wind, and demand together to understand the renewable supply-demand balance more clearly.
Plan Beyond the ISO Horizon
Gain additional planning time with five-day PJM and 15-day ERCOT solar forecasts.
Frequently Asked Questions About AG2 Solar Forecasts
Your frequently asked questions about North America and Europe solar forecatsts are here with answers. Looking for more info? Email us at Sales@AtmosphericG2.com.
AG2 provides country-level solar forecasts across Europe and proprietary solar generation forecasts for CAISO, ERCOT, and PJM in North America.
European solar forecasts are included with AG2 Trader and are based on individual weather models at the country level.
CAISO, ERCOT, and PJM are separate North American services that use AG2’s proprietary modeling to translate weather conditions into expected solar generation.
Coverage varies by market:
- CAISO: Aggregate and all subregions
- ERCOT: ISO total and six load zones
- PJM: Aggregate, Mid-Atlantic, South, and West subregions
AG2’s solar modeling incorporates deterministic and ensemble weather guidance, including cloud cover, irradiance, solar geometry, seasonal production patterns, asset distribution, and historical generation behavior. Machine-learning models translate those signals into expected generation in megawatts.
Yes. In CAISO, PJM, and ERCOT, the new solar models combined with AG2 wind forecasts, support net load forecasts.
Benefits
Market Leader
For 25 years, we have been the industry leader in weather-based commodity markets with a global NPS Score of 83, placing AG2 in an elite status of customer satisfaction.
Time is Money
“AG2’s data lets us trade with more confidence — more accurate trades, fewer risks. It’s increased profits 1–2%.”
“AG2’s data has helped us increase profits on non-short-term trades by about 5%”
Your Right Hand Man
At AG2, we do more than deliver weather forecasts. We empower energy professionals to make faster, smarter, and more confident decisions that directly impact their bottom line.
