Solar and Energy Consulting Services

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621 Energy provides energy consulting and solar advisory services, including:

Energy Consulting

  • Utility bill analysis and rate tariff evaluation

  • Energy usage analysis

  • Identification of Energy Conservation Opportunities (ECO)

  • Management of ECO implementation

PV System Feasibility Studies

  • Site evaluation

  • Solar resource evaluation including shading measurements

  • Optimal system sizing and performance modeling

  • Financial analysis

  • System specification or Request for Proposal (RFP) development

  • Product evaluation/comparison

Commissioning or Re-Commissioning of PV Systems

  • Quality control of system installation

  • Measure for all DC strings and compare to design: polarity, Voc, Isc, I-V curves 

  • Confirm proper inverter operation

  • Verify that monitoring system values match measured values

  • Evaluate system KWh performance using measured irradiance and temperature

Monitoring of PV System Performance on a daily, weekly or monthly basis

  • Model system performance and compare to actual performance

  • Benchmark performance to comparable systems in the area

  • Determine reasons for kWh/kWp deviations

  • Quantify system availability (reliability)

  • Estimate system inefficiencies in the field

  • Recommend improvements