Powerwall 3: Enhanced Features for Modern Homes
Powerwall 3 is a home battery that has achieved the No. 1 market share in the U.S.1. This model integrates a solar power conditioner, making it a hybrid system that significantly improves compatibility with solar power generation systems. It can also be installed as a standalone unit or added to existing solar power systems. With higher output and advanced features, Powerwall 3 is designed to meet the needs of many Japanese households.
For more details on Powerwall 3, please visit the Tesla website.
Powerwall 3 has obtained new domestic safety certifications (JIS C 4412 and JIS C 8715-2), IoT product security certification (JC-Star), and communication standard (ECHONET Lite) for the Japanese market. Furthermore, it has completed device registration with the Sustainable open Innovation Initiative (SII), a requirement for many national and local government subsidies2. For example, Tokyo currently offers subsidies of up to 1.2 million JPY3, encouraging more households to adopt home batteries and utilize clean energy.
1 According to a 2025 Ohm analytics research report.
2 Requirements and procedures for obtaining subsidies vary depending on the subsidy provider; customers are advised to verify details themselves.
3 Tokyo Metropolitan Government, FY2026 Home Battery Introduction Promotion Project Subsidy, covering equipment and construction costs for battery systems, up to 1.2 million JPY.
Powerwall 3 Product Overview
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Hybrid Battery for Simplicity: Powerwall 3 now includes an integrated solar power conditioner, allowing direct connection to solar panels and achieving an industry-leading conversion efficiency (DC>AC) of 97.5%. This reduces the number of required devices, simplifies installation, and enhances aesthetics. It is suitable for those considering installing solar power and batteries together, or for new detached homes. It can also function as a standalone unit for homes with existing solar power systems, allowing customers to continue using their existing power conditioners.
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High Output of 9.69 kW: The maximum output has been approximately doubled from Powerwall 2’s 5 kW to 9.69 kW. This allows most households to operate all household appliances simultaneously. It provides peace of mind during power outages, enabling daily life to continue even in emergencies.
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Improved Weather Resistance: Powerwall 3 offers a wide operating temperature range (-20°C to 50°C), dustproof, severe salt damage resistance, and added water immersion resistance (up to 60cm from the bottom). This ensures reliable operation across Japan, from Hokkaido to Okinawa, in various weather conditions.
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Refined Design: The compact design has been refreshed, featuring an aesthetic exterior that blends seamlessly with any installation location.
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Japanese Standard Compliance: Compliance with domestic safety certifications (JIS C 4412 and JIS C 8715-2), IoT product security certification (JC-STAR), and communication standard (ECHONET Lite) ensures suitability for the Japanese market.
Seamless Monitoring and Management with Tesla App
The Tesla App allows real-time monitoring and management of home energy status from a smartphone. In addition to an intuitive app interface, it includes features that clearly explain current conditions and operational background, providing a deeper understanding of home energy usage and enhanced peace of mind.
All Powerwall units are equipped with Tesla Home, a home energy management system that optimizes household energy use. At its core is Tesla’s proprietary AI technology, Opticaster. Opticaster analyzes multiple data sources—such as weather forecasts, electricity demand predictions, fluctuations in electricity prices, and solar power generation forecasts—using machine learning to automatically determine and execute the optimal energy usage for each household. This intelligent control allows customers to consistently utilize energy in the most economical and environmentally friendly way, without conscious effort. Furthermore, it learns and optimizes for each household’s lifestyle with continued use.
SMART GRID EXPO [Autumn] 2026 Overview
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Exhibition Name: SMART GRID EXPO [Autumn] – The 20th [International] Smart Grid Exhibition – 2026
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Dates: September 9 (Wednesday) – 11 (Friday), 10:00 – 17:00
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Venue: Makuhari Messe (Map)
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Booth Location: E9-52
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Admission: Free (Pre-registration required)
Recruitment of Tesla Certified Sales and Installation Partners
Tesla is currently recruiting certified sales and installation partners in Japan to expand the sales of Powerwall 3. Applications are accepted continuously on the Tesla website. For in-person consultations, visitors can meet with representatives at the Tesla booth during SMART GRID EXPO. Reservations for consultations at SMART GRID EXPO can be made in advance via the Smart Grid Expo Business Meeting Reservation Form.
Inquiries about Powerwall 3 Installation
Customers interested in Powerwall 3 installation can apply via the Tesla website. After applying, a Tesla certified sales and installation partner in the customer’s area will contact them.
Receive Latest Updates
Customers wishing to receive the latest information, including updates on Powerwall 3, can register here.
