Inverter DC Oversizing Guide

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Oversizing of power optimizers is not allowed: Module STC as listed in the module datasheet must not exceed the power optimizer rated
input DC power.
Some countries and grid operators prohibit inverter oversizing or limit oversizing to a lower value than the maximum allowed by SolarEdge. In
these cases, always follow the local regulations.
Oversizing by Location
135% oversizing is allowed in the following countries:
Austria
France (Not including Corsica and offshore territories)
Portugal
Belgium
Germany
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Romania
Bulgaria
Greece
Slovakia
Canada
Italy
Slovenia
Croatia
Latvia
Spain
Czech
Lithuania
Sweden
Denmark
Netherlands (Not including offshore territories)
Switzerland
Estonia
Poland
In the USA or Australia, refer to the next section.
In all other countries maximum allowed oversizing is 125%.
Oversizing in USA and Australia
Since maximum allowed oversizing depends on local temperatures, refer to the following maps for the maximum allowed oversizing in USA
and Australia.
In locations where irradiance levels are frequently above 1000 W/m2, and in locations with moderate climate, the maximum allowed
oversizing is 125%.
Figure 1: USA map
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In Germany, utilities sometimes require to limit the AC power to 70% of the DC power according to EEG 2012. In these installations, oversizing of 155% is
allowed.