LONDON (Reuters) – Shell launched a new green power business for homes across Texas on Tuesday, aiming to lure customers with plans including free charging for electric vehicles during off-peak hours and credit for excess solar power homeowners export to the grid. The new U.S. retail brand called Shell Energy Solutions builds on Shell’s 2017 acquisition of MP2 Energy, a commercial and residential power retailer with about 33,000 customers. Texas, whose power grid is largely isolated from the rest of the country to avoid certain federal regulations, is the largest energy producer and biggest co…