The efficiency for this if you read their report is between 15-17%. Keep in mind this is substantially less than what Panasonic, LG, Trina, Sunpower, Solaria and many more are currently selling with with PERC technology coming out for late Q2 that will push efficiency for mods to 24% for available inventory. The technology isn’t good enough for solar shingles today. Just like, energy storage and batteries are still not where they need to be to be sold residentially. It’s still a few years off. With the 30% ITC dropping to 0% as soon as 2022...RGS is too little efficiency too late