We chose the Sun Mar Excel, despite our initial reservations we now would not look back, we are greener and free from the grid. The system is cleverly designed and easy to maintain. We also installed the Biolan 70 greywater filter system which we highly recommend this system runs its self with very little maintenance. Customer service was second to none, Patrick is a pleasure to deal with and he supported and helped us with great integrity and we thank him greatly for his support.