Goal Zero · Batteries
Goal Zero Tank PRO 4000
$1,399.89Works with
Yeti PRO 4000 (up to 4 tanks per station)
Adds 3,994 Wh (51.2V, 78Ah) of 4,000-cycle LiFePO4 storage per module to the Yeti PRO 4000 — stack up to four tanks for 20 kWh total home and RV backup. Built-in accessory port cable nests directly into the stack.
Use
What it adds
The Goal Zero Tank PRO 4000 adds 3,994 Wh (51.2V, 78Ah) of LiFePO4 capacity to the Goal Zero Yeti PRO 4000 portable power station. Up to four Tank PRO 4000 units stack directly beneath a single Yeti PRO 4000, scaling total system capacity from 4 kWh up to 20 kWh for RV installs and whole-home backup.
Once connected via its built-in high-current accessory port cable, the Tank PRO 4000 locks into the stack and charges or discharges seamlessly alongside the Yeti PRO 4000 from AC wall power, solar arrays, or 12V/24V vehicle alternator input.
Compatibility
Product details
- Brand
- Goal Zero
- Category
- Batteries
- Compatible with
- Yeti PRO 4000 (up to 4 tanks per station)
- Weight
- 80.2 lb / 36.4 kg
- Dimensions
- 21.4 × 13.8 × 9.2 in (54.3 × 35.1 × 23.3 cm)
- Compatibility
- Yeti PRO 4000 (up to 4 tanks per station)
- Cell chemistry
- LiFePO4
- Battery pack capacity
- 3,994 Wh (51.2V, 78Ah)
- Cycle life
- 4,000 cycles
- Charge temperature
- 32°F to 125.6°F (0°C to 52°C)
- Discharge temperature
- -4°F to 140°F (-20°C to 60°C)
In action
Reference setups & real-world use
Haven Transfer Switch & Essential Circuits
Tank PRO 4000 nests beneath the wheeled Yeti PRO 4000 beside a Goal Zero Haven Home Transfer Switch, syncing AC, solar, and alternator charging as one system.
Stacked RV Shore Power & Workshop Backup
Two Tank PRO 4000 (3,994 Wh LFP) expansion batteries locked beneath the Yeti PRO 4000 on its wheeled cart to scale backup storage to 12 kWh (up to 4 tanks / 20 kWh).
Highlights
Why it's worth it
- Modular scalability — start with one or two expansion batteries and add more as your power needs grow
- Higher capacity than earlier Tank models, so the PRO system can run essentials for days
- Nests directly with the Yeti PRO 4000 — once connected, the two units sync and charge/discharge as one system
- LiFePO4 battery chemistry rated for roughly 8x the lifespan of earlier-generation expansion batteries
- Charges alongside the Yeti PRO 4000 from wall power, a vehicle, or solar input
In the box
What's included
- Goal Zero Tank PRO 4000
- Accessory port cable (built-in)
- User Manual
Keep browsing
More compatible accessories
Goal Zero Yeti Tank Expansion Battery
Works with: Yeti 1000X / 1500X / 3000X / 6000X + required Yeti Link
Adds 1,200 Wh (12V, 100Ah) of sealed AGM deep-cycle capacity per tank via the required Yeti Link Expansion Module. Chain up to four tanks via built-in EC8 connectors for 4.8 kWh of additional storage.