Rank #4 in Best LiFePO4 Battery 2026: 10 Ranked, and Where the Spec Sheets Slip
ECO-WORTHY CUBIX100 48V 100Ah Rack Battery
Price and rating as shown on Amazon when we collected them. Both change.
ECO-WORTHY's CUBIX100 is a 100Ah LiFePO4 battery sold as a 48V server rack unit and listed in its technical details at 51.2 Volts. At £714.99 it takes fourth place in this guide, and it is the only battery here shaped to slide into a standard 3U cabinet rather than sit on a shelf. The listing gives its weight as 103 pounds and its size as 17.13 x 20.55 x 5.63 inches, and says one person can handle it.
The number that decides its place is the cost of the energy it stores. 51.2V multiplied by 100Ah comes to 5,120Wh, or 5.12kWh, so £714.99 works out at £139.65 per kWh. That is the highest figure in this guide: the 12V 100Ah Rvpozwer works out at £101.55 per kWh. The listing does not use one voltage figure consistently — the title says 48V, the monitoring bullet says "48V(51.2V)" and the technical details say 51.2 Volts. Everything on this page is taken from the Amazon listing, not from any test of our own.
How those 8 ratings break down
An average hides its own shape. This is the spread behind the 5.0 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £714.99 |
|---|---|
| Customer rating | 5.0 out of 5 from 8 reviews |
| Stated voltage | 51.2 Volts (the title says 48V) |
| Capacity | 100Ah LiFePO4, 1.0 count |
| Price per kWh | £139.65 (calculated: £714.99 ÷ 5.12kWh) |
| Weight | 103 pounds (as listed) |
| Dimensions | 52.2 x 43.5 x 14.3 centimetres |
| Best Sellers Rank | 15,836 in Business, Industry & Science; 32 in Deep Cycle Batteries |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“These batteries are not yet installed due to delay in pv system installation. However I am impressed by the quality of these very heavy batteries each about a hundred pounds in weight.It takes some timd to understand the manual partly because of american-english colloquialisms. The few photos dont actually show anything usful un regard to the text they should support leading fo my asking several questions.None the less, I feel condident in my purchase and look forward to the ststem operation when at some later time point I can offer up a comment from experience witb the solar panels, inverter and batteries.”
Verified purchase“A good, easy installation, good, reliable battery. And a good information on your phone”
What it is up against
The rivals it was ranked against in Best LiFePO4 Battery 2026: 10 Ranked, and Where the Spec Sheets Slip.
Questions people ask
Does the ECO-WORTHY CUBIX100 work out cheaper per kWh than a 12V battery?
No. £714.99 for 5.12kWh is £139.65 per kWh, against £101.55 per kWh for the 12V 100Ah Rvpozwer in this guide.
How much energy does the CUBIX100 store?
51.2V x 100Ah = 5,120Wh, or 5.12kWh.
Is it a 48V or a 51.2V battery?
All three figures appear in the listing: the title says 48V, the monitoring bullet says "48V(51.2V)" and the technical details say 51.2 Volts.
What protection does the ECO-WORTHY CUBIX100 have?
Its bullet lists a 100A BMS, a 125A air switch and a battery power switch, inside a full-metal shell.
What comes in the box?
Parallel cables, communication cables, a grounding wire, terminal protective covers, screws and a user manual.
How is the 5.0 rating made up?
8 reviews, all five-star — the listing's histogram shows 100% at five stars.
Comments
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