Monitoring parameter for solar rooftop system
Depending on utility metering, the electricity bill shows how much electricity the owner obtains from the grid and how much electricity the solar system delivers to the grid. There is no detailed information about energy production of the solar PV system. To determine the overall energy production and behaviour of the solar PV system, inverter-direct monitoring and data logging hardware and web monitoring systems are available on the market today.
| Monitoring parameter | Symbol | Unit |
| Solar PV module voltage | VDC | V |
| Grid-fed voltage | VAC | V |
| Solar PV module current | IDC | A |
| Grid-fed current | IAC | A |
| Solar PV module output power | PDC | W |
| Grid-fed power | PAC | W |
| Solar PV module temperature | Tmod | °C |
| Ambient temperature | Tamb | °C |
| Wind speed | v | m/s |
| Global irradiation (air mass 1.5) | G | W/m2 |
