ECHO 4.0HV
48.2 kWh High-Voltage
Battery System
The foundation of SunFusion's high-voltage lineup. 48 Hithium 314Ah Grade-A LiFePO₄ cells in a 48S configuration deliver 153.6V nominal and 48.2 kWh of usable energy. Mounts in the Guardian HV enclosure. Zero thermal runaway. 16,000+ cycles.
ECHO 4.0HV
Hithium 314Ah — The Gold Standard
Every ECHO HV system uses the same Hithium 314Ah Grade-A prismatic cells that power our 48V ECHO 3.0 modules — now in high-voltage series configurations for 3-phase commercial inverters.
48.2 kWh · 48S1P
48 Hithium 314Ah cells wired in series. Three 16-cell sub-modules create 153.6V nominal with 98% usable depth of discharge.
- 48 × Hithium 314Ah Grade-A
- 48S1P (3 × 16S sub-modules)
- 153.6V nominal (115.2–175.2V)
- Same cells as ECHO 3.0
- 98% usable DOD
16,000+ Cycle Life
Hithium Grade-A LiFePO₄ cells deliver 16,000+ cycles at 98% DOD — that's 25+ years of daily cycling without ever replacing a cell.
- 16,000+ cycles @ 98% DOD
- 25+ year calendar life
- Zero capacity memory effect
- <0.5% monthly self-discharge
- Grade-A cell selection only
HV Battery Management
Master + slave BMS architecture with active balancing across all 48 cells. CAN bus and RS485 for native Sol-Ark communication.
- Master + 3 slave BMS boards
- Active cell balancing
- CAN bus & RS485 comms
- Sol-Ark native protocol
- Cell-level voltage monitoring
Zero Thermal Runaway
LiFePO₄ chemistry physically cannot catch fire or explode. No NMC, no NCA — ever. The chemistry trusted in aircraft and medical devices.
- LiFePO₄ = zero thermal runaway
- No NMC / No NCA
- Multi-level overcurrent protect
- Over/under voltage shutoff
- Thermal sensor per module
Guardian HV Enclosure
Designed to mount inside the Guardian HV shell — aerospace-grade aluminum with integrated fire suppression and 1125°F fire safety rating.
- Guardian HV shell compatible
- 1125°F fire safety rating
- Aerospace-grade aluminum
- Integrated fire suppression
- Indoor / outdoor rated
SunFusion Monitor
Real-time monitoring to the individual cell level via the SunFusion Monitor platform. SMS & email alerts. Predictive maintenance.
- Cell-level voltage display
- Real-time SOC & SOH
- SMS + email alerts
- Predictive maintenance
- Remote diagnostics
ECHO 4.0HV Technical Data
| Specification | Value |
|---|---|
| Model | ECHO 4.0HV |
| Total Energy | 48.2 kWh |
| Usable Energy (98% DOD) | 47.2 kWh |
| Nominal Voltage | 153.6V |
| Voltage Range | 115.2V – 175.2V |
| Cell Type | Hithium 314Ah LiFePO₄ Grade-A |
| Cell Configuration | 48S1P (3 × 16S sub-modules) |
| Continuous Discharge | 100A (15.4 kW) |
| Peak Discharge (30s) | 200A (30.7 kW) |
| Max Charge Current | 100A |
| Depth of Discharge | 98% |
| Round-Trip Efficiency | ≥97% |
| Cycle Life | 16,000+ @ 98% DOD |
| Calendar Life | 25+ years |
| Self-Discharge | <0.5% / month |
| Operating Temperature | -20°C to 60°C |
| BMS Architecture | Master + 3 × Slave |
| BMS Communication | CAN bus & RS485 |
| Enclosure | Guardian HV Compatible |
| Chemistry | LiFePO₄ (Lithium Iron Phosphate) |
| Safety Certifications | UL9540, UL9540A, UL1973 |
| Warranty | 15 Years / 16,000 Cycles |
Sol-Ark HV Integration
The ECHO 4.0HV at 153.6V is optimized for the Sol-Ark 30K's HV battery input. For the Sol-Ark 60K (160V minimum), step up to the 5.0HV or 6.0HV.
Sol-Ark 30K (150–550V)
153.6V nominal sits right in the 30K's HV input range. 48.2 kWh provides 1.5+ hours of full-load backup at 30kW continuous.
Sol-Ark 60K (160–800V)
153.6V is just below the 60K's 160V minimum. For 60K systems, choose ECHO 5.0HV (307.2V) or ECHO 6.0HV (460.8V).
Choose Your Capacity
ECHO 4.0HV
3 × 16S sub-modules
Hithium 314Ah Grade-A
16,000+ cycles
ECHO 5.0HV
6 × 16S sub-modules
Hithium 314Ah Grade-A
16,000+ cycles
ECHO 6.0HV
9 × 16S sub-modules
Hithium 314Ah Grade-A
16,000+ cycles
48.2 kWh of Pure LiFePO₄
The ECHO 4.0HV delivers serious energy storage with zero thermal runaway risk. Guardian HV enclosure available.
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