eVault MAX 18.5 kWh | Whole-Home Power, Built to Last
A high-capacity 48V LFP battery designed for whole-home backup, seamless integration, and long-term energy independence — with 18.5 kWh of reliable storage.
eVault MAX 18,5 kWh
Built to Last Whole-Home Power
The eVault MAX 18.5 kWh is Fortress Power’s most advanced 48V lithium iron phosphate (LFP) battery, delivering whole-home and light commercial energy storage in a compact, all-in-one design. Scalable up to 370 kWh, it’s ideal for applications ranging from off-grid living and backup power to solar self-consumption and peak demand reduction.
Engineered for simplicity and performance, the eVault MAX features AC and DC coupling options and a serviceable top-access design that makes installation faster and more reliable. Whether you’re powering a home, small business, or critical backup system, the eVault MAX offers the safety, capacity, and flexibility to get the job done.
Aplicaciones
Residencial
Light Commercial
FEATURES
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High-Capacity, Scalable Storage
Delivers 18.5 kWh of energy storage, scalable up to 370 kWh, making it ideal for whole-home backup, large residential projects, and light commercial applications.
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Long-Lasting Performance
Engineered for durability with 8,000+ cycles at 80% DoD, the eVault MAX ensures dependable, long-term energy storage and lower lifetime costs.
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Exceptional Efficiency
Operates at up to 98% round-trip efficiency at 0.5C, maximizing energy savings and performance across a wide range of usage scenarios.
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Smart Battery Management System (BMS)
Equipped with a digital BMS for cell-level monitoring, automatic balancing, and enhanced safety — ensuring consistent, optimized operation.

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Versatile Climate Resilience
Built to perform in extreme environments with a discharge temperature range of -4°F to 140°F, ideal for both hot and cold climates.
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Certified for Safety & Compliance
Fully compliant with UL1642, UL1973, and UL9540 safety standards, ensuring peace of mind and simplified permitting and inspection processes.
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Installer-Friendly Design
Features top-cover service access for easy installation and maintenance, reducing labor time and minimizing installation errors.
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Integrated Display & Smart Connectivity
Includes a built-in LCD touchscreen for real-time performance metrics and supports closed-loop inverter communication for seamless energy management.

PRODUCT INFORMATION
- Especificaciones
- Descargas
Energía total (kWh) | 18.5 |
Capacidad[Ah] | 360 |
Tensión nominal [V] | 51.2 (48) |
Rango de tensión[V] | 48-55 |
Corriente de carga recomendada [A] | 150 |
Máx. Corriente de carga (continua)[A] | 180 |
Máx. Corriente de descarga (continua)[A] | 180 |
Máx. Corriente de impulsos (durante 10 segundos) [A] | 200 |
Temperatura de carga [F] | 32 a 120 |
Temperatura de descarga[F] | 14 a 77 |
Dimensión [H x W x D, pulgadas] | 20,3 x 20,3 x 42,2 |
Peso[lbs] | 520 |
Grado de protección de la caja | IP55 |
Opciones de montaje | De pie |
Certificados | UL 1642, UL1973, UL9540 |
Garantía | 10 años |
Escalabilidad | Máximo 20 en paralelo (370 kWh) |
Comunicación | CAN/RS485 |
Interruptor automático de alta corriente | 250A |
Eficiencia | >98% |
Manuales
Garantía
Certificaciones
Fichas técnicas
VIDEOTECA
eVault MAX 18.5kWh Video Library
PRODUCT COMPATIBILITY

Fortress Power Envy Inversores
The eVault MAX is easy to pair with your favorite third-party inverters with a simple click.