The Enphase IQ Battery 5P takes the opposite approach: instead of one large unit, you get a 5 kWh building block designed to scale. Six embedded microinverters live inside each unit, so the battery essentially brings its own power electronics with it — a natural fit if your solar array already runs on Enphase microinverters, since everything speaks the same language.
That modularity is the 5P’s real advantage. Homeowners who aren’t sure how much backup they’ll need can start with one unit and add more later, rather than committing to a fixed capacity up front. It won’t match the Powerwall 3‘s single-unit output or storage, and it leans on Wi-Fi rather than cellular for connectivity — but a 15-year warranty, the longest in this comparison, says a lot about how Enphase expects these units to hold up over time.