ECO-WORTHY Cubix100 Review: 48V 100Ah Server Rack Battery

Affiliate disclosure: SolOffGrid may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This is a research-based review of published product information. We have not purchased, installed, opened, charged, discharged, or physically tested the Cubix100.

The ECO-WORTHY Cubix100 is marketed as a 48V-class LiFePO4 server-rack battery with 100Ah capacity and 5.12kWh of listed energy. It may be worth comparing if you need a rack-format module with monitoring and BMS communication ports, but product availability is a major caveat: the U.S. single-unit listing showed “Sold out” when checked on September 30, 2026. Confirm current stock and the exact product revision before treating it as a purchase option.

Check current availability: View the ECO-WORTHY Cubix100 listing. Confirm the current product version, stock, warranty, and compatibility documentation before buying.

ECO-WORTHY Cubix100 specifications at a glance

What the 5.12kWh figure means

Capacity is calculated from nominal voltage multiplied by amp-hours. A 51.2V, 100Ah label corresponds to 5,120Wh, or 5.12kWh, of nominal stored energy. That is not a promise that all 5.12kWh will be available to loads. Usable energy depends on the permitted depth of discharge, system conversion losses, reserve settings, temperature, battery condition, and manufacturer limits.

The product is often described as “48V” because it is intended for a 48V-class system, while its listed nominal voltage is 51.2V. The page gives a 40–58V range. Buyers should compare those exact values with the equipment manufacturer’s documented battery input and charge settings rather than assuming every product called 48V behaves identically.

Features ECO-WORTHY lists

Rack format

The manufacturer presents Cubix100 as a server-rack battery. Confirm the exact external dimensions, rack height, weight, included brackets, supported orientation, and cabinet depth in the current product drawing. “Rack battery” does not mean every 19-inch cabinet, rail, shelf, or mounting method is automatically appropriate. The battery and rack may be sold separately.

Monitoring and communications

The product listing describes Bluetooth/Wi-Fi monitoring and CAN/RS485 communication. These are useful specifications to investigate, not proof of compatibility with a particular inverter. The communication protocol, pinout, cable, firmware, and approved model list must match the exact system. Ask ECO-WORTHY and the inverter manufacturer to confirm the complete model numbers and supported arrangement in writing if this matters to your setup.

Current limits and operating conditions

The current product page lists a 100A maximum charge/discharge figure and a 40–58V operating range. Check the manual to see how the current rating is defined and whether it refers to continuous use, a brief limit, or another condition. Review charge and discharge temperature limits, any low-temperature charging behavior, allowed parallel configurations, and the product’s protective limits. Do not infer safe system sizing from a single headline number.

Warranty and certification claims

ECO-WORTHY’s page lists a 10-year limited warranty and references standards/certifications including UL 1973 and UL 9540A. Those are manufacturer-page claims, not an independent certification audit by SolOffGrid. Before purchase, obtain the current warranty document and confirm the listing or certificate applies to the exact Cubix100 model and intended use. Check registration rules, installation requirements, cycle/throughput limits, exclusions, shipping terms, and who handles a claim.

What we like on paper

• Useful stated energy class: 5.12kWh is a clear 100Ah-class capacity for preliminary comparison.
• Several monitoring paths: Bluetooth/Wi-Fi and CAN/RS485 are listed, subject to exact protocol support.
• Published voltage window: the listing gives a range buyers can check against approved system documentation.
• Long stated warranty term: the 10-year limited term is worth reviewing alongside its detailed conditions, not by itself.
• Product-format focus: the rack format may be convenient where an approved rack/cabinet is planned and documented.

What remains uncertain or needs checking

• Current stock: the single-unit page was sold out at our check. A product page can remain online when inventory is unavailable.
• Exact compatibility: port names do not establish that a specific inverter can communicate with the Cubix100 BMS.
• Rack fit: confirm current drawings for dimensions, weight, rack height, rails, brackets, and cabinet requirements.
• Usable energy: nominal kWh should not be confused with energy delivered to an AC or DC load.
• Certifications and warranty: verify the official documents and the scope of each claim, including exclusions.
• Independent performance: we have not verified capacity, cycle life, thermal behavior, or app performance with physical testing.

Who might consider the Cubix100?

It is a candidate for a shopper comparing 100Ah-class, 5.12kWh server-rack batteries who already knows the system’s documented voltage and current requirements and can confirm cabinet fit and BMS communication. It is not a shortcut around system design. It may not be the right choice if you need an in-stock product immediately, if the manufacturer cannot confirm inverter compatibility, or if the physical rack requirements do not match your space.

How it compares with alternatives

VEVOR’s LPS48100-B is another 51.2V, 100Ah, 5.12kWh-class rack listing with monitoring features. VEVOR says that LPS48100-B’s BMS communication protocol is not compatible with the similarly named LPS-48100 model, so verify the exact model before buying. Renogy’s 48V 50Ah Smart LiFePO4 is a smaller 2.4kWh-class battery and a different format; it should not be compared as a one-for-one 100Ah rack module. See our best server rack battery comparison and 48V solar battery guide for the wider shortlist.

Questions to ask before ordering

• Is the exact Cubix100 version in stock and shipping to my U.S. location?
• Can the battery manufacturer confirm the exact inverter make, model, firmware, and BMS protocol?
• What is the usable capacity under the documented test and warranty conditions?
• What are the continuous charge/discharge limits and temperature limits?
• What rack dimensions, weight rating, mounting hardware, clearances, and orientation are required?
• Which current certificates and warranty documents apply to this exact model?
• What accessories or cables are included, and what is sold separately?

Verdict: promising specifications, but stock and documentation first

On paper, the Cubix100 offers the headline capacity and rack-format features many buyers compare in a 48V-class battery. Our recommendation is conditional rather than a blanket “best”: check current availability, read the latest manual and warranty, confirm certification scope, measure the cabinet, and obtain written system compatibility guidance. Since the U.S. listing showed the single unit sold out on September 30, 2026, do not plan a purchase around that listing until stock is confirmed.

Methodology: We checked ECO-WORTHY’s current U.S. product listing and compared its published information with related manufacturer materials. We did not buy, install, open, charge, discharge, or lab-test this battery. We did not independently validate performance, compatibility, certifications, or warranty claims.

Updated / specifications checked: September 30, 2026. Stock, price, specifications, product revisions, certification documents, and warranty terms can change.

Manufacturer source: ECO-WORTHY Cubix100 official product listing. For a sizing estimate, use the solar battery calculator; it does not replace professional design.