With such a tight squeeze on profit margins, it’s tempting to choose an inverter on price, but with seven years of installing experience and 3,500 inverters behind us, we know this is a false economy.  A customer will be on the phone as soon as a system stops working and this takes time and a man off the road to sort out. For me, the best inverter make is SMA, it’s a well known, efficient brand with a good reputation, warranty and customer service. I like their bolt on products for monitoring and the training – invaluable when things go wrong.  We also receive a payment for replacing faulty inverters. Paul Taylor, research & development director, The Green Electrician Group