This is a 4ft (1220mm) power cable that connects the Ethos controller to the battery within a 15kWh Ethos system. It is an accessory/replacement part, not a standalone power storage product.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
What This Cable Is
This cable runs between the controller and battery on a 15kWh Ethos system. It carries the model number CBL091-K and is sold as a single, fixed-length unit at 4ft (1220mm). The manufacturer did not supply connector type, gauge, weight, or maximum rated temperature data for this specific cable, so those specs are flagged below rather than guessed.
Battery Characteristics
This is a wiring accessory, not a battery. Chemistry, voltage, and capacity ratings do not apply to this listing — those specs belong to the Ethos battery/controller units this cable connects, not to the cable itself.
Wiring & Configuration Limits
This cable is built for one job: linking the Ethos controller to the Ethos battery in a 15kWh system, at a fixed 4ft (1220mm) length. It is NOT rated or sold for series/parallel battery interconnects, and it is NOT a general-purpose power or welding cable. Do not substitute it into a different Ethos capacity tier or a non-Ethos system unless BigBattery confirms fitment first.
Pro-Installer Tip
Controller-to-battery cables see continuous current, and a loose or corroded lug connection at either end is a common source of voltage sag and intermittent controller faults — not a bad battery. Torque connections to the controller and battery terminals per the manufacturer's spec sheet, and re-check them after the first 30 days of thermal cycling, since new connections settle. Validate the fix with a clamp meter or a shunt-based battery monitor reading voltage drop across the connection, not just battery state of charge. On a 15kWh Ethos system operated at typical lithium depth-of-discharge (80-100% DoD), a bad cable connection will masquerade as premature capacity loss — check the cable before you suspect the cells.
Key Benefits
- Purpose-built length (4ft / 1220mm) for the 15kWh Ethos controller-to-battery run — no field-cutting or re-terminating required.
- Direct-fit replacement part carrying its own SKU (CBL091-K) for straightforward reordering.
Technical Table
| Spec | Value |
|---|---|
| Connector | [NEEDS VERIFICATION] |
| Cable Gauge | [NEEDS VERIFICATION] |
| Weight | [NEEDS VERIFICATION] |
| Cable Length | 4ft (1220mm) |
| Max. Rated Temperature | [NEEDS VERIFICATION] |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
Compatible with: 15kWh Ethos controller-to-battery connections requiring a 4ft (1220mm) run.
NOT confirmed compatible with: other Ethos system capacity tiers, non-Ethos BigBattery products, or use as a battery-to-battery series/parallel interconnect. Connector type and gauge are not published for this SKU, so do not assume fitment with a different cable run without confirming with BigBattery first.
Options & SKUs
| Variant | SKU | Price |
|---|---|---|
| Default | CBL091-K | $90.00 |
FAQ
Q: What does this cable connect?
A: It connects the controller to the battery on a 15kWh Ethos system, at a fixed length of 4ft (1220mm).
Q: What connector type does it use?
A: Connector type was not provided by the manufacturer for this SKU. Check the "Resources (System Manuals and Warranty)" Tab or confirm with BigBattery before ordering if connector fit is critical.
Q: Can I use this cable for series or parallel battery wiring?
A: No. This cable is built for the controller-to-battery run on a 15kWh Ethos system, not for series/parallel interconnects between batteries.
Q: Will this fit other Ethos system sizes?
A: Fitment is confirmed only for the 15kWh Ethos configuration. Ask BigBattery before using it on a different capacity tier.
Warranty & Support
Warranty terms for this cable are covered in the manufacturer documentation — see the "Resources (System Manuals and Warranty)" Tab above for full details. If you're not sure this cable matches your Ethos system configuration, ask us before you order. We always reply back.
