CleanPower Estimator API

WattPlan® revealing savings of electric vehicles and solar in California, New York, Arizona

Press Release | December 2015

Online software has already provided 10,000 residential customers with instant, personalized estimates to determine...

New WattPlan® software by Clean Power Research sets standard for utilities to deliver highly personalized answers to energy questions

Press Release | June 2015

Early adopters are cost-effectively engaging customers about solar options with WattPlan®’s interactive, online...

Solar Resource Variability: Myth & Fact

Research | March 2012

Examines short-term solar resource variability caused by passing clouds. View Article >>>

Valuing a Portfolio of PV Investments

Research + Solar Prediction | October 2010

This presentation describes the importance of PV output variability as a factor in calculating the value of a fleet of...

Quantifying the Cost of High Photovoltaic Penetration

Research | May 2010

Calculating the cost of energy storage to provide firm capacity on a power grid with high PV penetration. Download PDF...

A Simple Method for Consumers to Address Uncertainty When Purchasing Photovoltaics

Research | September 2003

Should consumers invest in PV now, or wait? Download PDF >>>

Blog

Jul 30, 2025

Beyond TMY: Unlocking solar potential in Northern regions with high latitude time-series data

This week, we’re pleased to present a guest post from GroundWork® Renewables’ Director of Data and Analytics Julie Chard. At GroundWork, we’re committed to delivering high-quality solar-meteorological (MET) data to reduce uncertainty in solar resource assessments. With more than 15 years of experience supporting the solar development community, our observational MET programs combine best-in-class equipment and […]

PNM^® transforms electric service requests with PowerClerk^®

Public Service Company of New Mexico (PNM®) is showing what’s possible when utilities modernize their service request process. With more than 12,000 requests each year, from new home connections to complex commercial upgrades, PNM needed a better way to manage the...

Reducing uncertainty with observational MET programs

This week, we’re pleased to present a guest post from GroundWork® Renewables’ Director of Data and Analytics Julie Chard. At GroundWork, we’re committed to delivering high-quality solar-meteorological (MET) data to reduce uncertainty in solar resource assessments. With more than 15 years of experience supporting the solar development community, our observational MET programs combine best-in-class equipment and […]

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