This kit lets you add expansion capacity to an existing ETHOS battery rack system. It ships as a parallel expansion kit with the stackable module hardware and cabling needed to tie a new module into your current ETHOS setup.
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 Kit Is
The ETHOS Expansion Kit is built for owners who already run an ETHOS rack-based battery system and need to scale capacity. The manufacturer has not published a detailed spec sheet or written description for this specific kit in the source material provided, so this page documents what can be confirmed from the product images and listing data: a stackable-type module kit, a rack-to-rack communication cable, a red/black rack power cable, and an ETHOS rack base. [NEEDS VERIFICATION] for chemistry, voltage, Ah/Wh capacity, BMS limits, cycle life, dimensions, weight, and operating temperature range — none of these values were included in the source data for this listing.
Battery Characteristics
Chemistry: [NEEDS VERIFICATION]. Group Size / Rack Type: ETHOS stackable rack module (based on included ETHOS Rack Base component shown in product images). No voltage, Ah, or Wh figures were provided in the source data, so they cannot be listed here without risking inaccurate specs.
Wiring & Configuration Limits (Series/Parallel)
This is listed as a parallel expansion kit, meaning it is intended to add a module in parallel to an existing ETHOS rack system rather than in series. Beyond that designation, the source data does not specify a maximum number of parallel units, series limits, or combined system capacity. [NEEDS VERIFICATION] for exact series/parallel maximums — confirm with BigBattery documentation before wiring multiple units together.
Do not assume series compatibility. Do not mix this expansion kit with non-ETHOS battery modules. Standard lead-acid or third-party lithium chargers are NOT confirmed compatible — use only chargers and rack controllers specified for the ETHOS system.
Pro-Installer Tip
Expansion kits are where cell-balance mistakes get made. Wiring a new module in parallel to a rack that has already cycled for months, without confirming both modules are at matching state-of-charge and matching BMS firmware, sets up an imbalance the moment you close the breaker. That imbalance shows up later as one module aging faster than the rest of the bank, and eventually a BMS lockout on the weaker unit. Before tying in this expansion kit, use a shunt-based battery monitor on the existing rack to confirm resting voltage and state-of-charge, and match the new module to it as closely as the manufacturer documentation allows. Whatever depth-of-discharge limit BigBattery specifies for the ETHOS platform in its official documentation, apply it consistently across every module in the rack — not just the original bank.
Key Benefits
- Adds parallel expansion capacity to an existing ETHOS rack system.
- Includes rack-to-rack communication cable for module-to-module data linkage.
- Includes red/black rack power cable for DC interconnection.
- Includes ETHOS rack base for physical module mounting.
Technical Table
| Spec | Value |
|---|---|
| Voltage | [NEEDS VERIFICATION] |
| Capacity (Ah) | [NEEDS VERIFICATION] |
| Capacity (Wh) | [NEEDS VERIFICATION] |
| Chemistry | [NEEDS VERIFICATION] |
| Max Continuous Discharge (A) | [NEEDS VERIFICATION] |
| Max Continuous Charge (A) | [NEEDS VERIFICATION] |
| Peak Discharge (A) | [NEEDS VERIFICATION] |
| Cycle Life | [NEEDS VERIFICATION] |
| Dimensions | [NEEDS VERIFICATION] |
| Weight | [NEEDS VERIFICATION] |
| Terminal Type | [NEEDS VERIFICATION] |
| Operating Temp Range | [NEEDS VERIFICATION] |
| Low-Temp Charging Protection | [NEEDS VERIFICATION] |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
Compatible with: existing ETHOS rack-based battery systems as a parallel expansion module. Included in this kit: stackable-type module hardware, rack-to-rack communication cable, red/black rack power cable, and ETHOS rack base, per the product images provided.
NOT confirmed compatible with non-ETHOS battery platforms. NOT intended for series expansion based on its "parallel expansion" designation. Do NOT install without confirming compatible firmware/communication protocol between the existing rack and this expansion module. Charging equipment compatibility beyond the ETHOS platform's own charge controller is NOT confirmed in the source data.
Options & SKUs
| Variant | SKU | Price |
|---|---|---|
| variable parent (2 variations) | K0698-V | $2217.00 |
FAQ
Q: What is included in the ETHOS Expansion Kit?
A: Based on the product images provided, the kit includes a stackable-type module, a rack-to-rack communication cable, a red/black rack power cable, and an ETHOS rack base.
Q: Can this kit be wired in series with my existing ETHOS rack?
A: This kit is listed as a parallel expansion kit. Series wiring limits are not specified in the available data, so confirm series compatibility with BigBattery documentation before attempting it.
Q: What voltage and capacity does this expansion kit add?
A: Voltage and capacity figures were not included in the source data for this listing. [NEEDS VERIFICATION] — refer to the manufacturer Resources tab for confirmed specifications.
Q: Will this kit work with a non-ETHOS battery system?
A: Compatibility with non-ETHOS platforms is not confirmed. Treat this as an ETHOS-specific expansion component only.
Warranty & Support
Refer to the "Resources (System Manuals and Warranty)" Tab above for the manufacturer's warranty terms on this kit. If you have questions about compatibility with your existing ETHOS rack before ordering, ask us — we always reply back.
