Choosing the right home battery system is critical for reliable backup power and solar integration. This guide compares the EcoFlow Delta Pro Ultra and the Tesla Powerwall—two of the most popular whole-home energy solutions.
Based on specs, features, and real-world use cases, we break down how these two systems differ in terms of power output, capacity, expandability, solar input, and overall value.
Specs Comparison Table
EcoFlow Delta Pro Ultra vs Tesla Powerwall Specs Comparison
| Feature | EcoFlow Delta Pro Ultra | Tesla Powerwall |
|---|---|---|
| Battery Capacity | 6kWh (expandable to 90kWh) | 13.5kWh (up to 135kWh with 10 units) |
| Inverter Power | 7.2kW (21.6kW max with 3 units) | 5kW (7kW peak) |
| Battery Chemistry | LiFePO4 | NMC (Nickel Manganese Cobalt) |
| Cycle Life | 3,500+ cycles (to 80%) | 4,000+ cycles (to 70%) |
| Max Solar Input | 5,600W per unit | 7,600W with Tesla Gateway |
| AC Output Voltage | 120/240V Split Phase | 120/240V Split Phase |
| Weight | 125 lbs per unit | 251.3 lbs |
| Dimensions | 27.6 × 13.4 × 15.8 in | 62.8 × 29.7 × 6.3 in |
| Off-grid Capability | Yes | Yes |
| App Control | Yes (EcoFlow App) | Yes (Tesla App) |
| Warranty | 5 years (10 years with registration) | 10 years |
Power & Performance
The EcoFlow Delta Pro Ultra delivers higher inverter output—7.2kW per unit and up to 21.6kW with 3 units—making it ideal for high-demand households and off-grid setups. The Tesla Powerwall, by contrast, has a continuous 5kW output (7kW peak), which suits moderate loads but may require stacking for larger homes.
For surge handling and whole-home power, Delta Pro Ultra offers better flexibility, especially in split-phase and 3-phase environments.
Battery Capacity & Cycle Life
EcoFlow DELTA Pro Ultra Whole-Home Backup Power
from: EcoFlow
The Powerwall offers a single-unit capacity of 13.5kWh, stackable up to 10 units for 135kWh. EcoFlow Delta Pro Ultra starts lower at 6kWh, but is modular and scalable to a massive 90kWh.
Cycle life favors EcoFlow in depth of discharge (80% vs Tesla’s 70%) and LiFePO4 chemistry, which is generally safer and longer-lasting than Tesla’s NMC cells.
Output Ports & Expandability
EcoFlow Delta Pro Ultra includes a wide array of AC and DC output ports, making it versatile for both home and portable use. Its modular design allows you to expand both power and storage independently.
The Tesla Powerwall is fixed in form factor and designed specifically for home backup via integration with the Tesla Gateway. It lacks standalone output ports but integrates seamlessly with solar systems and smart home energy management.
Portability & Weight
Tesla’s wall-mounted Powerwall is sleek but heavy at 251 lbs. It’s not designed for mobility.
EcoFlow Delta Pro Ultra, while still hefty (125 lbs), has a more portable form factor with wheels and handles, allowing easier repositioning or off-grid use.
Charging Options
The Delta Pro Ultra supports high solar input (up to 5,600W), dual AC charging, and EV charger compatibility. This gives it an edge in flexible recharging, especially off-grid.
The Tesla Powerwall requires installation with Tesla Gateway and supports up to 7.6kW solar input via inverter integration, but doesn’t offer direct EV input or portable charging options.
Price & Value
- Tesla Powerwall (with Gateway and installation): Around $11,500+ per unit.
- EcoFlow Delta Pro Ultra base unit: ~$5,799 (expandability adds cost but is modular).
EcoFlow offers more flexibility and off-grid features at a lower base price, while Tesla provides long-term value with seamless solar integration and a 10-year warranty standard.
Final Verdict
Choose EcoFlow Delta Pro Ultra if:
- You need high inverter power or plan to run large appliances off-grid
- You want modular expansion and portable design
- You prefer LiFePO4 safety and longevity
Choose Tesla Powerwall if:
- You already use Tesla solar products
- You want a low-maintenance, fully-integrated backup system
- You value long-term warranties and a sleek, fixed installation
Both systems are excellent, but they cater to different user needs. For off-grid flexibility and modular growth, go with EcoFlow. For grid-tied whole-home backup and solar synergy, Tesla Powerwall is hard to beat.
FAQs
Can EcoFlow Delta Pro Ultra power an entire home?
Yes, especially when scaled up. With multiple units and split-phase integration, it can handle high-demand households.
Is the Tesla Powerwall compatible with third-party solar?
Yes, but optimal performance requires installation via Tesla-certified installers and their Gateway system.
Which is better for off-grid living?
EcoFlow Delta Pro Ultra offers more flexibility, solar input, and portability, making it better suited for off-grid scenarios.
Individual buyer’s guides:
Last update on 2025-05-12 / Affiliate links / Images from Amazon Product Advertising API