Here's a battery backup I looked at today. Great looking system eh? Post Plumber, can you say kwaulitee?
Battery voltage measured .679 volts dc. I measured the voltage coming from the "charger" at 2.1 volts dc. The backup pump itself was not only disconnected in the sump pit, it was moved aside, and the pump discharge opening was left open. So when the primary pump operated the discharge water simply dumped back into the pit. Might be a good thing, we don't want that sump pump cycling on and off too quickly do we.
The owner decided to eliminate the battery backup part of the system. It's in the back of my truck if anyone wants it.
lookes like the back up pump came off at valve probably because it was hanging by valve in air I know in my pic I have 2 pvc hangers but I have been back to replace with a 1 1/2" fricton clamp that way pump is not floating by check valve