BigBattery
BigBattery ETHOS 15.36kWh 48V Battery Expansion Kit — K0699
BigBattery ETHOS 15.36kWh 48V Battery Expansion Kit — K0699
SKU: K0699
- Regular price
- $3,842.00
- Regular price
- Sale price
- $3,842.00
- Unit price
- per
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In stock
15.36kWh of additional ETHOS storage.
Add 15.36kWh of nominal battery capacity to an existing compatible ETHOS system. Includes 3 modules, a base and expansion cabling. No ETHOS control box or inverter is included.
Choose the right ETHOS package
This kit adds another battery stack to an existing compatible ETHOS installation. It requires an existing ETHOS control box with available supported capacity, compatible batteries, the correct wiring layout and a compatible inverter. It cannot power AC loads on its own.
Included with K0699
3 × 5.12kWh ETHOS battery modules, one ETHOS stack base, two 4.9ft (1500mm) stack-to-stack power cable pairs and one 4.9ft (1500mm) stack-to-stack communication cable. Each battery-module box includes a 0.7ft red/black parallel cable pair, a 0.7ft communication cable, two L wall-mounting brackets and fasteners. The current manual also shows the module side covers.
Solar panels, site wiring, grounding conductors, external protection and installation are separate. Only the equipment described above is included. Follow the manufacturer packing list and installation instructions for the supplied components.
Plan capacity and compatibility
The 3 included modules provide 15.36kWh of nominal DC energy at 51.2V. Actual AC runtime depends on the complete system, usable battery capacity, inverter efficiency and connected loads. Installation and any required system certification must be evaluated for the complete equipment combination.
ETHOS systems use CANBus and RS485 communication. Expansion does not automatically increase inverter output. Confirm battery matching, firmware, control-box limits and protection before adding modules.
Manufacturer specifications · Installation manual and wiring diagrams · Compare battery banks · Size your backup system · Confirm expansion compatibility
Product Data
Technical Specifications
| Specification | Details |
|---|---|
| Brand / supplier SKU | BigBattery / K0699 |
| Package type | Battery Expansion Kit |
| Battery modules | 3 × 5.12kWh ETHOS |
| Nominal energy | 15.36kWh DC |
| Battery chemistry | LiFePO4 (lithium iron phosphate) |
| System class / nominal voltage | 48V / 51.2V |
| Nominal capacity | 300Ah |
| Operating voltage | 48–57V |
| Charging voltage range | 55.6–57V |
| Charge temperature | 0–45°C (32–113°F) |
| Discharge temperature | −20–60°C (−4–140°F) |
| Module enclosure rating | IP65 / NEMA 4X; installation must follow the manual |
| ETHOS control box | Not included; existing compatible control box required |
| Inverter / solar panels | Sold separately |
| Individual module dimensions D × W × H | 170 × 674 × 410mm (6.7 × 26.5 × 16.14in) |
| Expansion base | One included |
| Stack-to-stack power cables | Two 4.9ft cable pairs |
| Stack-to-stack communication cable | One 4.9ft cable |
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Ordering Information
Shipping & Returns
Free shipping in the Lower 48: Standard delivery includes residential delivery and liftgate service when needed, with no fuel surcharge or order minimum. We send tracking when available, and the freight carrier contacts you to schedule delivery.
30-day returns: Contact Torven within 30 days of delivery and we will help you get started. See the return policy for item condition and return-shipping details.
Delivery problem? We are here to help. Contact Torven with your order number and photos. We will handle the claim coordination with the supplier and carrier and help arrange a resolution. Return shipping is covered for approved damage, defect or incorrect-item returns.
Manufacturer warranty: BigBattery provides a 12-year limited repair/replacement warranty for eligible new battery purchases and one-year coverage for included accessories. Manufacturer conditions, exclusions and claim procedures apply; return-shipping responsibilities change after the first year. Read the current BigBattery warranty policy.
BigBattery
BigBattery ETHOS 15.36kWh 48V Battery Expansion Kit — K0699
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