Earlier this month SolarCity announced details of a new high-efficiency solar panel it plans on producing at its 1 GW module factory under-construction in Buffalo, NY. The company claimed that the module’s 22.04% efficiency was enough to make it the “most efficient rooftop solar module” ever made.  The claim apparently sparked a “war” of high-efficiency solar panels because in the week following the announcement two other solar panel makers claimed to have surpassed SolarCity’s record. expand full story