Does that sound unfair.
Power tolerance solar panels.
3 power tolerance this is the range within which a panel manufacturer is saying the module can deviate from its specified stc max power.
For example a 255 watt panel may be tested as low as 250 watts but still sold as a 255 watt panel.
Lg is quality focused solar panel manufacturer using a positive tolerance only grading system for their solar panels.
As the technology behind solar panels continues to advance it s becoming more common for panels to have a 0 or 0w negative power tolerance.
Power tolerance is a measure of how much electrical power a solar panel can produce above or below its rated capacity at any time.
One of the purposes of power tolerance is to estimate how much electrical power a solar panel can produce.
Many solar panel manufacturers use a plus minus tolerance normally shown in the panel specifications.
Sunpower e20 327w module.
If you had a 10 10 power tolerance on a 200w panel the actual panels on your roof could have actual max powers of between 180w and 220w.
For example a power tolerance of 5 5 on a 100 watt w panel would mean the panel could produce 95 w to 105 w under real world conditions.
Importance of power tolerance in solar panels this paper highlights the importance of power tolerance when choosing solar panels.
This means the solar panel will always have a rated stc max power equal or greater than what s been specified.