License requirements for solar panels and related equipment in Washington DC
The REIP program in Washington State requires that equipment be new and not previously installed at another location. However, general NEC and IIEE stadnards would apply as are applicable to all electrical components. There are also requirements under the REIP for warranties to be given to customers on solar panels and inverters.
Licensing requirements for Solar Power installation companies in Washington DC
There is no specific solar power installation qualification that is mandated in Washington DC but contractors must be licensed as electrical contractors and must be registered with the REIP(Renewable Energy Incentive Program).