---
title: "Dyness Tower T21 vs Deye GB-L24 - Battery Comparison | ComparePV"
description: "Compare Dyness Tower T21 vs Deye GB-L24 side by side: usable energy, round-trip efficiency, power, cycle life and the full specification."
source: "https://comparepv.com/compare-batteries/dyness-tower-t21/gb-l24"
updated: 2026-01-11
---

# Dyness Tower T21 vs Deye GB-L24

GB-L24 leads on the differences that matter

The largest is usable energy: 0.77 kWh apart. 5 of 15 comparable parameters are identical, with 18 more left out because at least one datasheet does not publish them.


## The two batteries


| Attribute | A | B |
| --- | --- | --- |
| Battery | [Dyness Tower T21](https://comparepv.com/battery/dyness-tower-t21) | [Deye GB-L24](https://comparepv.com/battery/gb-l24) |
| Manufacturer | Dyness | Deye |
| Usable energy | 21.31 kWh | 22.08 kWh |
| Cells and voltage | HV | LFP HV |

[See 26 Dyness offers](https://comparepv.com/offers?manufacturer=dyness&product_type=battery)

[See 44 Deye offers](https://comparepv.com/offers?manufacturer=deye&product_type=battery)


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | Tower T21 | GB-L24 | Difference |
| --- | --- | --- | --- |
| Usable energy | 21.31 kWh | 22.08 kWh | 0.77 kWh apart |
| Nominal energy | 21.31 kWh | 24.54 kWh | 3.23 kWh apart |
| Depth of discharge | 100 % | 90 % | +10 pp for Tower T21 |
| Nominal voltage | 576 V | 614 V | 38 V apart |
| Weight | 269.0 kg | 253.0 kg | -16.0 kg for GB-L24 |
| Min operating temperature | -10 °C | -20 °C | -10 °C for GB-L24 |
| Weight per kWh | 12.6 kg/kWh | 11.5 kg/kWh | -1.2 kg/kWh for GB-L24 |
| Max operating temperature | 50 °C | 60 °C | +10 °C for GB-L24 |
| Ingress protection | IP54 | IP65 | IP54 vs IP65 |
| Dimensions | 1500x504x380 mm | 1530x540x385 mm | 1500x504x380 mm vs 1530x540x385 mm |


## Every compared parameter


| Parameter | Tower T21 | GB-L24 |
| --- | --- | --- |
| Usable energy | 21.31 kWh | 22.08 kWh |
| Nominal energy | 21.31 kWh | 24.54 kWh |
| Depth of discharge | 100 % | 90 % |
| Max system capacity | - | 24.5 kWh |
| Modules per stack | 2-6 | 2-6 |
| Continuous discharge power | 12.78 kW | - |
| Continuous charge power | 12.78 kW | - |
| Peak discharge power | - | - |
| Power per kWh | 0.60 kW/kWh | - |
| Round-trip efficiency | - | - |
| Cycle life | 6000 cycles | 6000 cycles |
| Cycle test depth | - | - |
| Capacity at end of life | - | 70 % |
| Self-discharge | - | - |
| Voltage class | High voltage | High voltage |
| Nominal voltage | 576 V | 614 V |
| Operating voltage | - | 166.4-700 V |
| Cell chemistry | - | LFP |
| Active cell balancing | - | - |
| Thermal management | - | Yes |
| Inverter | None (battery only) | None (battery only) |
| Inverter power | - | - |
| Grid connection | - | - |
| Backup power | - | - |
| Weight | 269.0 kg | 253.0 kg |
| Weight per kWh | 12.6 kg/kWh | 11.5 kg/kWh |
| Dimensions | 1500x504x380 mm | 1530x540x385 mm |
| Ingress protection | IP54 | IP65 |
| Outdoor-rated | - | - |
| Min operating temperature | -10 °C | -20 °C |
| Max operating temperature | 50 °C | 60 °C |
| Warranty | 10 yrs | 10 yrs |
| Warranted throughput | - | - |


## Related comparisons

- [Dyness Tower T21 vs Dyness Tower Pro TP23](https://comparepv.com/compare-batteries/dyness-tower-t21/dyness-tower-pro-tp23) - 14 differences, the largest is usable energy
- [Dyness Tower T21 vs Huawei LUNA2000-21-S1](https://comparepv.com/compare-batteries/dyness-tower-t21/huawei-luna2000-21-s1) - 12 differences, the largest is usable energy
- [Dyness Tower T21 vs BYD Battery-Box Premium HVM 22.1](https://comparepv.com/compare-batteries/dyness-tower-t21/byd-battery-box-premium-hvm-22-1) - 4 differences, the largest is usable energy
- [Deye GB-L24 vs Deye GB-SL-EU (6 modules in series)](https://comparepv.com/compare-batteries/gb-l24/gb-sl-eu-6-modules-in-series) - 5 differences, the largest is weight
- [Deye GB-L24 vs Deye GB-L (6 modules in series)](https://comparepv.com/compare-batteries/gb-l24/ningbo-deye-ess-technology-co-ltd-gb-l-6-modules-in-series) - The same specification on paper


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Source: https://comparepv.com/compare-batteries/dyness-tower-t21/gb-l24

Not in this file, on the page: a written summary generated on request.