BigBattery ETHOS 5.12kWh 48V Battery Module — FETHS-48051-G1

Choose the right ETHOS package

This module expands an existing ETHOS stack; it is not a complete standalone battery system. A compatible ETHOS control box, base, proper interconnects and a compatible inverter are required. Confirm the existing battery version and available expansion capacity before ordering.

Included with FETHS-48051-G1

One 5.12kWh ETHOS battery module. 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 1 included module provides 5.12kWh 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

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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.