Tesla Powerwall 3 1807000-20-y 13.5kWh Expansion Lithium Iron Phosphate Battery - Newer Model US made

Upgrade your Tesla Powerwall 3 system with the 1807000-00-Y Expansion Unit, a 13.5kWh lithium-ion battery designed to provide additional energy storage for residential and commercial applications. This DC-coupled expansion works in conjunction with a Powerwall 3 leader unit and connects seamlessly via the Tesla Expansion Harness.

Ideal for solar self-consumption, emergency backup, or expanding existing installations, the Powerwall 3 Expansion Unit ensures reliable energy storage while maintaining Tesla’s signature high-quality design.

Key Features

• 13.5kWh Capacity: Adds extra storage for solar self-consumption or emergency backup.
• Broad Compatibility: Works exclusively with Powerwall 3 (model 1707000-xx-J or later).
• Sturdy Construction: IP67-rated for indoor/outdoor use, resistant to temperatures –20°C to 50°C.
• Expandable System: Up to 3 expansion units per Powerwall 3, for a total of 94.5kWh.
• 10-Year Guarantee: Maintains at least 70% performance after a decade.
• All-Black NEMA 3R Enclosure: Stylish and weatherproof for any installation.

Installation & Integration

• Requires Tesla-certified technician installation.
• Connects via Tesla Expansion Harness (0.5m, 2m, or 4m lengths).
• Not field-serviceable — faulty units must be exchanged.
• Floor or wall-mount options, stackable up to 3 expansion units (floor mount only).

Technical Specifications

• Battery Capacity: 13.5kWh
• Battery Type: Lithium-ion
• Compatibility: Tesla Powerwall 3 only
• Operating Temperature: –20°C to 50°C (–4°F to 122°F)
• Operating Humidity: Up to 100%, condensing
• Storage Temperature: –20°C to 30°C (–4°F to 86°F), 25% SOE
• Maximum Elevation: 3000 m (9843 ft)
• Enclosure Rating: NEMA 3R / IP67
• Dimensions (HxWxD): 43.5 × 24 × 6.6 in (1105 × 609 × 168 mm)
• Total Weight (Wall-Mounted): 261.2 lb (118.5 kg)
• Expansion Weight: 242.5 lb (110 kg)
• Glass Cover Weight: 14.5 lb (6.5 kg)

Applications

• Residential energy storage
• Solar self-consumption
• Backup power supply
• Energy optimization for commercial properties

Warranty & Compliance

• Warranty: 10 years with 70% minimum performance retention
• Certifications: UL 1973, UL 9540

• Tesla Powerwall 3 - Specsheet
• Tesla Powerwall 3 - Installation Manual
• Tesla Powerwall 3 - Battery Certificate
• Tesla Powerwall 3 - Warranty