As one of the most experienced solar installers, SunPower by esaSolar has been installing the industry-leading SunPower system since its founding in 2010. The company offers industry-leading system monitoring on all systems it installs, measuring energy production in real time. Although the company does not offer a power purchase agreement option, we recommend customers consider this premier solar installer due to its other financing options, certifications and awards, and high-grade solar equipment.