A backyard, outside submersible sump pump pit will collect leaves and debris, so you need to guard, or limit, that exposure with screening or netting that won’t interfere with the float switch.
The backyard sump pump will collect excess rainwater in one area and pump into a storm sewer or to another area of your yard. If you suspect the water from a septic source, do not discharge the water onto your lawn, but connect to a sanitary sewer.
An outside sump pump drainage system can move water quickly during a storm or flooding. But if it is a larger problem, you should use it with other solutions, like French drains, a dry well or perimeter drain pipes.
There are outside backyard sump pumps that are submersible or pedestal pumps. Both are effective at collecting water through a filter and discharging it through a pipe or hose to be discharged to your desired location. The difference lies in how the pump draws the water and the size of the sump pit.
If you have a pedestal sump pump system where the pump sits above the underground sump pit and draws the water out through a pipe, you need only maintain the small intake tube filter.
Submersible sump pumps are quieter and can last longer, but may cost more.
Either way, use one with an anti-siphon device that prevents any backflow from the storm sewer.
Always use a GFCI (ground fault circuit interrupter), not an ordinary outlet or extension cord. Electricity and water is dangerous.
And don’t let water pool around your foundation. Direct the water at least 10 feet from the exterior of your home. You should send to a low part of your yard or storm drain.