I have a very similar situation. I don't know if you have considered this, but what if the electricity goes out? What if the sump pump burns out while you are on vacation? I found a battery back-up sump pump at the local home center, but I don't know if it will pump enough volume high enough to keep up with the flow in my sump. The other question is how long will the battery last pumping as often as it will have to to keep up with the flow? Any way you might check out one of these to see if it meets your needs.