Pytes’ second-generation V5, adding a breaker, Wi-Fi and fire suppression. Worth seeking out for a code-compliant rack system once US stock appears.

A 5 kWh server-rack module with a screen, for owners extending an existing EG4 LL bank. Most new buyers will find it out of stock.
- 5.1 kWhCapacity
- 100 AOutput
- 6,000Cycles
- YesUL 9540A
- 10 yearsWarranty
No store we check sells it online; the maker lists where to buy or who installs it.
- Touch screen shows each module’s charge and cell data without a laptop
- Closed-loop communication with most major 48 V inverters
- Banks of up to 64 modules
- Ten-year warranty
- Hard to find in stock now; EG4’s own store no longer lists it
- No heater, so it cannot charge below freezing
- Its UL 9540 listing covers only one EG4 cabinet setup, not the battery alone
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 | SR-48-100-IN-01 |
|---|---|
| Capacity | |
| Case | Server rack (19-inch) |
| Nominal voltage | 51.2 V |
| Capacity | 100 Ah |
| Energy | 5.1 kWh |
| Chemistry | LiFePO4 |
| Cycle life | 6,000 at 80% depth |
| Power | |
| Continuous discharge | 100 A |
| Max charge current | 100 A |
| Modules in parallel | Up to 64 |
| Safety and communication | |
| UL 1973 | Yes |
| UL 9540A | Yes |
| UL 9540 | No |
| Communication | CAN, RS485 |
| Works with inverters | EG4, Schneider, Sol-Ark, Victron, Growatt, Megarevo, Luxpower, Deye |
| Self-heating | No |
| App | No |
| Build | |
| Display | Yes |
| Built-in breaker | Yes |
| Enclosure | IP20 |
| Dimensions | 6.1 x 17.4 x 19.3 in (155 x 442 x 490 mm) |
| Weight | 99.6 lb |
| Warranty | 10 years |
| Released | 2023-09 |
Alternatives in this case
A cold-tolerant 5 kWh rack module with a screen, for off-grid builds in unheated spaces. Choose the Cubix100 instead if your permit needs a UL listing.
Amazon $1,099.99 ECO-WORTHY $1,099.99A standard 5 kWh server-rack module for EG4 and other 48 V inverter owners building a bank in a cabinet. Buy it only if you can find it in stock; EG4 itself is selling WallMount batteries instead.
Compare
Compare the EG4 LL-S 48V 100Ah with any other 48V solar battery →
More from EG4 Electronics: every EG4 Electronics product ranked.