Keeps working at 60 degrees C
Discharge is rated from -20 up to 60 degrees C, five degrees past the common ceiling.

Solar BatteriesModel GB-SL
A high-voltage floor battery of 4.09 kWh GB-LM4.0 modules covering 8.18 to 24.54 kWh, rated to discharge at up to 60 degrees C with Type II surge protection.
Deye battery GB-SL price in the UAE: AED 2,400.
incl. VATIn stock
Our retail price in the UAE: we sell direct and deliver within 3 business days, door to door.
Discharge is rated from -20 up to 60 degrees C, five degrees past the common ceiling.
Two to six modules of 102.4 V each combine into 8.18 to 24.54 kWh of storage.
Overvoltage protection of DC Type II and AC Type II covers both sides of the connection.
Up to 10 stacks parallel for larger homes, over CAN2.0 and RS485.
No fans at all: natural cooling carries the heat while cycle life passes 6,000 cycles.
The lithium charging strategy adapts itself to the BMS without manual profiles.
Where summer heat makes other packs derate, this one keeps working. The Deye GB-SL is rated to discharge from -20 up to 60 degrees C, five degrees beyond the usual ceiling, while its IP65 tower stands outside on 540 x 385 mm of ground, rising 1,980 mm. Inside, GB-LM4.0 modules of 4.09 kWh and 102.4 V each combine in twos through sixes for 8.18 to 24.54 kWh, of which 7.36 to 22.08 kWh is usable at the recommended 90% depth of discharge, across 204.8 to 614.4 V nominal. Ten stacks can be paralleled when one is not enough. Type II overvoltage protection guards both the DC and AC sides against surges, the charging strategy adapts itself to the BMS, and natural cooling means no fans to age or hum. Current runs 40 A continuous with a 50 A peak for 120 seconds, cycle life passes 6,000 cycles to 70% capacity, certification covers CE, IEC 62619, VDE 2510-50 and UN38.3, and the warranty is 10 years. We are an authorised Deye distributor and supply the GB-SL from our own stock, with technical support before and after the sale.
Specifications last updated 10 February 2026
| Energy | 4.09 kWh |
|---|---|
| Usable Energy | 7.36-22.08 kWh |
| Module Energy | 4.09 kWh |
| System Energy | 8.18-24.54 kWh |
| Nominal Voltage | 102.4 V |
| Module Nominal Voltage | 102.4 V |
| System Nominal Voltage | 204.8-614.4 V |
| Operating Voltage | 179.2-691.2 V |
| Rated Capacity | 40 Ah |
| Module Capacity | 40 Ah |
| Cell Chemistry | LiFePO4 |
| Cycle Life | >6000 |
| End-of-Life Capacity | 70 % |
| Recommended Depth of Discharge | 90 % |
|---|---|
| Max. Charge Current | 40 A |
| Max. Discharge Current | 40 A |
| Max. Charge/Discharge Current | 40 A |
| Recommended Charge/Discharge Current | 20 A |
| Peak Discharge Current | 50 (120s) A |
| Modules in Series | 2-6 |
| Min. Battery Module Quantity | 2 |
| Battery Module Models | GB-LM4.0 |
| Parallel Units | 10 |
| Overvoltage Protection | DC Type II, AC Type II |
| Warranty (Years) | 10 |
| Communication Ports | CAN2.0, RS485 |
|---|---|
| Dimensions | 540 x 1980 x 385 mm |
| Additional Notes | Charging Strategy for Li-ion Battery: Self-adaption to BMS |
| Module Dimensions | 540 x 220 x 385 mm |
| Module Weight | 39 kg |
| Weight | 137-293 kg |
| Altitude | <2000 m |
|---|---|
| Charge Temperature | -20 to 55 °C |
| Discharge Temperature | -20 to 60 °C |
| Operating Humidity | 5-85 % |
| Installation Location | Floor-Mounted |
| Enclosure IP Rating | IP65 |
| Storage Temperature | 0-35 °C |
| Cooling Type | Natural Cooling |
| Working Temperature | Charge: -20 to 55 / Discharge: -20 to 60 °C |
Its discharge window extends to 60 degrees C, higher than the 55-degree limit common elsewhere, and natural cooling avoids fan wear in dusty heat.
From 8.18 kWh with two GB-LM4.0 modules to 24.54 kWh with six, of which 7.36 to 22.08 kWh is usable at 90% depth of discharge; ten towers can then be paralleled.
Yes, it integrates Type II overvoltage protection on the DC side and Type II on the AC side.
The lithium charging strategy self-adapts to the BMS; current is 40 A continuous, 20 A recommended, with a 50 A discharge peak lasting 120 seconds.
It measures 540 x 1980 x 385 mm, weighs 137 to 293 kg depending on module count, seals to IP65 and stands on the floor below 2,000 m altitude.