Close the feedback loop
Compare solar estimates with real results
A forecast becomes more useful when it can be audited. Compare predicted production and savings with monitoring and utility-bill data from the same period, then keep a portable record.
Runs in your browser
Estimate accuracy check
Compare a proposal or Wattcrunch estimate with monitoring and bill results over the same period.
Production error
Enter actual data
Savings error
Enter actual data
Your values stay in this browser and are not submitted to Wattcrunch. Normalize partial-year comparisons for weather and use the same billing period before drawing conclusions.