Whilst presumably legit because the scheme was in partnership with GMCA, almost every other element of this process made me question the legitimacy of the installers. They required a deposit to be paid for the pre-installation survey to occur but the contract sent post-survey stated that paying of the deposit constituted acceptance of the contract. Also, the timescale for paying the full balance was miscommunicated; it was stated in contract that we had 10 working days from receipt of invoice but on requesting an invoice several days after the work had been done, I was told they couldn't provide an invoice until they'd received payment. On challenging this, I was given 10 days from the installation to make payment rather than 10 working days from the actual receipt of the invoice. So far the panels are performing considerably less well than pitched at survey (though perhaps this is just the weather). The installers insisted that the panels did not require cleaning or maintenance despite all solar panel literature ever suggesting otherwise. The app given to measure performance is somewhat poorly formatted and unreliable. The work was performed 44 hours quicker than anticipated though so, as long as the performance improves, worth the hassle for the discounted rate.