What it is
The EcoFlow Delta Pro Ultra is a whole-home battery backup system with 6kWh base capacity expandable to 90kWh. It delivers 7,200W continuous output (enough for an entire home including HVAC) and 16,800W surge. The system integrates with rooftop solar, the grid, and an EV charger. A smart panel manages automatic transfer between grid, solar, and battery power. LFP battery chemistry rated for 6,500 cycles.
Why we picked this
The Delta Pro Ultra competes directly with the Tesla Powerwall at a lower price point with more flexible installation. Where Powerwall requires a certified installer and electrical panel work, the Delta Pro Ultra can be set up as a plug-and-play system with the smart panel or permanently wired. The modular design means you start with one 6kWh unit and add capacity as needed. For homeowners who want whole-home backup without a $15,000+ installation, this is the most accessible entry point to home battery storage.
Key takeaways
- Base 6kWh capacity expandable to 90kWh in 6kWh increments, allowing homeowners to start small and scale battery storage as budget allows.
- 7,200W continuous output covers HVAC, refrigeration, cooking, and EV charging simultaneously, matching or exceeding most residential panel loads.
- LFP battery chemistry rated for 6,500 cycles to 80% capacity, providing approximately 18 years of daily cycling before significant degradation.