Support for Solar Potential Explorer (SPE) provided by Zenthor Systems Limited.
Solar Potential Explorer requires three inputs to calculate your solar potential:
Optionally enter your Panel Power Rating in Watts to see energy potential in kWh.
SPE calculates the theoretical maximum solar energy available to your specific panel installation for any day of the year. This assumes a perfect day — full sunshine, no cloud cover, no shading and clean panels.
SPE calculates the upper limit of what is physically possible. Real world generation is always lower due to:
Comparing your actual generation against SPE's calculation on a clear sunny day reveals your system's real efficiency.
No — any clear sky moment is enough.
When your panels are in full sun with no shading:
Example: SPE shows 78% and your panels are rated 1000W. Your inverter reads 706W — that's 70.6%. The 7.4% gap represents your system losses.
The gap between theory and reality is your system's loss figure — instantly, without waiting for ideal conditions that may never come.
A Full Sun Equivalent (FSE) hour represents one hour of solar energy at peak intensity (1000W/m²). It is a standard industry measure allowing fair comparison between different locations and panel orientations.
The Perfect Day benchmark is the maximum energy your panels could theoretically generate on a given day under ideal conditions. It provides a fixed reference point against which real performance can be measured.
Yes. Enter your latitude as a negative number for Southern hemisphere locations. Example: Sydney = -33.9. SPE correctly handles all latitudes from the Arctic to the Antarctic including polar day and polar night conditions.
The easiest way is to search for your location in Google Maps, right click on your location and select the coordinates shown. The first number is your latitude.
Use your phone's compass app pointed in the direction your panels face. Alternatively check your installation documentation or ask your installer.
SPE has been validated against real solar installation data from an EcoFlow Powerstream system. Under clear sky conditions SPE consistently predicts within 8% of actual generation, with the difference accounted for entirely by known system losses such as inverter efficiency and wiring resistance.
| Version 1.0 | Initial release. Instant and hourly solar potential display. Annual totals and best day calculation. Full Sun Equivalent hours. Perfect Day potential energy. |
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