Long story short:
I built my home 4 years ago and have a full basement. The sump pump runs constatnly. I have had 2 (minor) floods aleady due to sump pump failure. I installed a triple stairstepped system - consisting of 2 electrics and a (pathetic) electric back-up. I have not flooded since although the 2nd electric saved me twice already - once when the primary float malfunctioned and once when the primary float's connector rusted through and the float was floating on the top of the water. I am finishing the basement now and want more security for power outages (the basement can flood in a matter of hours).
I am looking at gas powered backup that comes on automatically when the main power fails. I only want enough power to run the sump - not the whole house. What is the best and most economical option for this? I have a friend who is a certified electrician and can do the install. Any suggestions would be helpful. Thanks