Currently there are 43 percent brutal one-star reviews and 42 percent 5-star reviews. That's an unusual ratio.
https://www.amazon.com/SUPERSUB-Submersible-Auto-Pump-650/dp/B003E1WQU4?ref_=fsclp_pl_dp_13
I helped deliver a 36RH that had one of these. The owner hated it. Don't know why.
I have two Jabscos remote in the engine compartment with pickups in the bilge. The Jabscos are FAR superior to the centrifugal pumps. They are also far more expensive. Also, test your manual pump a couple of times a year.