SimpliPhi SPHI-ESS-40-18 – 39.84 kWh Energy Storage System with 8 × 4.9 kWh LFP Batteries, 18 kW Hybrid Inverter, EnergyTrak & AGS
The SimpliPhi SPHI-ESS-40-18 is a high-capacity, fully scalable energy storage solution built for demanding residential and commercial applications. Equipped with eight 4.9 kWh Lithium Ferro Phosphate (LFP) batteries and three 6 kW hybrid inverters, the system delivers 39.84 kWh of reliable storage capacity and 18 kW of power output. It supports AC or DC coupling and integrates seamlessly with solar, generator, or grid power.
Designed for both on-grid and off-grid use, this system’s modular design allows for independent scaling of power and energy, while the EnergyTrak platform enables remote monitoring, fleet management, and over-the-air updates. The IP65-rated enclosure ensures durability for indoor or outdoor installation in harsh environments.
Key Features
39.84 kWh LFP Energy Storage
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Eight high-performance 4.9 kWh batteries for a total of 39.84 kWh.
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Expandable up to 72 batteries for 358.5 kWh of total storage capacity.
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10,000+ cycles at 80% DoD for long-term reliability.
EnergyTrak Advanced Control
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Intuitive mobile app with real-time system status and performance analytics.
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5-step commissioning for quick setup.
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Remote reconfiguration and automatic firmware updates for peak efficiency.
18 kW Hybrid Inverter Array
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Three 6 kW hybrid inverters with integrated MPPT.
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Works with solar, grid, and generator sources in AC or DC coupled configurations.
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<8 ms transfer time ensures seamless backup power without downtime.
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LCD interface for local control and system settings.
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Expandable up to 54 kW total inverter capacity.
Proven Lithium Ferro Phosphate Technology
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Cobalt-free LFP chemistry ensures superior thermal stability and safety.
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Integrated Battery Management System (BMS) for optimal charge cycles and protection.
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96% round-trip efficiency for maximum energy utilization.
All-Weather Rated
SimpliPHI 6 kW Inverter
Hybrid Inverter with integrated MPPT works seamlessly with the SimpliPHI 4.9 Battery, EnergyTrak, and Mobile App to deliver the most efficient, scalable, easy-to-use backup or primary power system available for homes and businesses.
- Multiple Energy Sources - Designed to pair with solar, grid or generator in either AC or DC coupled configurations
- Versatile - On the grid or off, with or without batteries
- Scalable - Add up to 9 inverters for increased load support for a total of 54 kW
- Seamless Transition - Less than 8 millisecond switchover time protects sensitive electronics and minimizes downtime
- Digital interface - Easy programming and monitoring of primary system functions on the LCD screen
- EnergyTrak Enabled - Remote monitoring and quick 5-step commissioning through EnergyTrak mobile app
- IP 65 - rated for indoor or outdoor installations
- Warranty - Up to 10-year limited warranty*
- Product Brochure | Download
- Installation Manual | Download
- Specification Sheet | Download
EnergyTrak Control System
Provides advanced system monitoring through a sophisticated mobile app for smartphones or tablets, delivering real-time status and updates with intuitive control over the entire SimpliPHI Energy Storage System.
- Simple, Smart, and Reliable - EnergyTrak offers an ever-improving platform to maximize value over the life of the system
- Streamlined - 5-step commissioning for fast, frustration-free setup from a mobile device
- Fleet Management - Visibility into customer installations to maximize system uptime
- Remote Re-configuration - Minimizes the need for site visits on commissioned systems
- Over-the-Air Updates - Automatically ensures systems and apps are secure and code-compliant with the latest features
- Connectivity - Wi-Fi, ethernet, and Bluetooth for simple, dynamic communication
- Product Brochure | Download
- Installation Manual | Download
SimpliPHI 4.9 Battery
Leveraging over a decade of battery expertise using Lithium Ferro Phosphate (LFP) chemistry, the SimpliPHI 4.9 Battery delivers efficient, reliable, and safe advanced-level power storage.
- Scalable - Up to 72 batteries with a total capacity of 358.5 kWh
- Closed-Loop Communications - Seamlessly integrate with other system components to streamline programming and ensure peak performance
- Battery Management System (BMS) - Proprietary state-of-the-art BMS protects the battery, creates additional safety, and extends cycle life
- Long Lifespan - 10,000 cycles at 80% DoD
- Maximum Energy Throughput - 34.9 MWh with 96% round trip efficiency increases the value of your storage investment over the life of the battery
- Retained Capacity - 80% remaining capacity after 10 years of use
- Safety-tested - Lithium Ferro Phosphate (LFP) chemistry is industry proven to reduce thermal runaway and fire propagation in residential and commercial installations
- IP 65 - Rated for indoor or outdoor use
- Warranty - 10-year limited warranty*
- Product Brochure | Download
- Installation Manual | Download
ESS Series Comparison
| Model |
Batteries |
Total Capacity (kWh) |
Total Power (kW) |
Inverters (6 kW) |
Includes AGS |
| SPHI-ESS-10-6 |
2 × 4.98 kWh |
9.96 |
6 |
1 × 6 kW |
Yes |
| SPHI-ESS-15-6 |
3 × 4.98 kWh |
14.94 |
6 |
1 × 6 kW |
Yes |
| SPHI-ESS-20-6 |
4 × 4.98 kWh |
19.92 |
6 |
1 × 6 kW |
Yes |
| SPHI-ESS-25-6 |
5 × 4.98 kWh |
24.90 |
6 |
1 × 6 kW |
Yes |
| SPHI-ESS-20-12 |
4 × 4.98 kWh |
19.92 |
12 |
2 × 6 kW |
Yes |
| SPHI-ESS-25-12 |
5 × 4.98 kWh |
24.90 |
12 |
2 × 6 kW |
Yes |
| SPHI-ESS-30-12 |
6 × 4.98 kWh |
29.88 |
12 |
2 × 6 kW |
Yes |
| SPHI-ESS-30-18 |
6 × 4.98 kWh |
29.88 |
18 |
3 × 6 kW |
Yes |
| SPHI-ESS-40-18 |
8 × 4.98 kWh |
39.84 |
18 |
3 × 6 kW |
Yes |
