NO! In short, that really is the answer. If youre like me youre going to want to know why. Think of capacitors like the front two shocks on a mountain bike. They lighten the load and strain on your battery. This will extend the life of your battery if you have multiple appliances or even a single appliance that draws 3-4x the power during startup that it does when it is running. THink A/c, Heat, maybe a large freezer, some vaccums. This all really depends on the size of your system. But honestly, you are comparing apples to oranges here. Capacitors are designed with circutry meant to discharge LARGE amounts of power or a minute or two TOPS!! They function best in blasts of 10 seconds or around there. Are they potentially helpful? yes. Are they batteries? no. they are far from batteries.