SunGoldPower CoreX 5 Pro
#13 in Server rackFull review
A well-equipped 5 kWh rack module with a screen and app, for indoor off-grid and backup banks that don’t need a UL listing.
Amazon $1,150$1,150
3.7/5
An older UL-listed rack module whose 50 A limit means you need several for a typical inverter. Buy the V5 instead unless you find a clearance deal.
- 5.1 kWhCapacity
- 50 AOutput
- 6,000Cycles
- YesUL 9540A
- 10 yearsWarranty
Check price at Inverters R Us
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Newer model: the Pytes V5 replaces this one (rated 4.4, #6 server rack). See every Pytes generation.
Discontinued: no longer sold new; the links below may show remaining or used stock.
Pros
- UL 9540, UL 9540A and UL 1973 listed
- Works closed-loop with older off-grid inverters such as OutBack, Magnum and Schneider
- 10-year warranty
Cons
- 50 A limit means a single module delivers only about 2.5 kW
- No heater, so no charging below freezing
- Hard to find in stock now that the V5 has replaced it
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its case. How we rank explains each one.
Specifications
| Model number | E-Box 48100R |
|---|---|
| Capacity | |
| Case | Server rack (19-inch) |
| Nominal voltage | 51.2 V |
| Capacity | 100 Ah |
| Energy | 5.1 kWh |
| Chemistry | LiFePO4 |
| Cycle life | 6,000 |
| Power | |
| Continuous discharge | 50 A |
| Peak discharge | 102 A |
| Max charge current | 50 A |
| Modules in parallel | Up to 96 |
| Safety and communication | |
| UL 1973 | Yes |
| UL 9540A | Yes |
| UL 9540 | Yes |
| Communication | CAN, RS485 |
| Works with inverters | Victron, Sol-Ark, EG4, Schneider, OutBack, Magnum, MidNite, Growatt, LuxPower, Studer, MPP, SRNE |
| Self-heating | No |
| App | No |
| Build | |
| Dimensions | 17.3 x 24.4 x 4.6 in (2.6U) |
| Weight | 112.5 lb |
| Warranty | 10 years |
| Released | 2022-08 |
Alternatives in this case
SOK SK48V100N
#14 in Server rackFull review
A heated, app-connected 5 kWh rack module for off-grid builders who charge in the cold. Look elsewhere if your permit needs a UL listing.
Amazon $1,199$1,199
LiTime 48V 100Ah ComFlex
#15 in Server rackFull review
A touchscreen rack module from a well-known battery brand, for indoor off-grid systems. UL-listed rivals with longer warranties cost less.
LiTime $1,099.99$1,099.99
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