Hess-20
Hess-20 is a 20.07 kWh floor-standing battery with an IP65 enclosure, for garages, plant rooms and covered outdoor spaces. Up to 16 units can run in parallel.
Why installers choose Hess-20
IP65 at 20 kWh
High capacity with a dust- and water-resistant enclosure.
Floor-standing
No wall fixing needed.
Scales to 16 units
Parallel connection for larger homes and small businesses.
Hess-20 technical data
| Specification | Hess-20 |
|---|---|
| Basic information | |
| Nominal voltage | 51.2 V DC |
| Voltage range | 44–58.4 V |
| Nominal capacity | 392 Ah |
| Rated capacity | 20.07 kWh |
| Communication | CAN / RS485 / RS232 |
| Max. units in parallel | 16 |
| Cycle life | 6,000 cycles (80% DoD) |
| Protection | Over-charge, over-discharge, over-current, short-circuit, low-voltage and temperature protection |
| Charging | |
| Recommended charging current | 100 A |
| Max. charging current | 200 A |
| Recommended charging voltage | 58 V |
| Max. charging voltage | 58.4 V |
| Discharging | |
| Recommended discharging current | 100 A |
| Max. discharging current | 200 A |
| Recommended discharge cut-off voltage | 44 V |
| Battery cut-off voltage | 44 V |
| Battery recovery voltage | 48 V |
| General | |
| Dimensions | 830 × 600 × 275 mm |
| Net weight | 168 ± 3 kg |
| Shell | Sheet metal |
| Protection rating | IP65 |
| Installation | Floor-standing |
| Cell type | LiFePO4 |
| Temperature | |
| Discharging temperature | -20 to 60 °C |
| Charging temperature | 0 to 55 °C |
| Storage temperature | -20 to 45 °C |
| Certification | |
| Documents | CE · UN38.3 · MSDS |
Data from the 2026 product catalogue. Specifications may change; we confirm the current datasheet with every quotation.
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