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GB-L20 vs Tower T17 5 of 18 identical Swap Change batteries

Deye GB-L20 vs Dyness Tower T17

Deye GB-L20
GB-L20
18.4 kWh LFP HV
Open battery page Datasheet PDF
VS
Tower T17
17.76 kWh HV
Open battery page Datasheet PDF
The verdict

GB-L20 leads on the differences that matter

The largest is usable energy: 0.64 kWh apart. 5 of 18 comparable parameters are identical, with 15 more left out because at least one datasheet does not publish them.

See all 13 differences
How alike are they
5 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

13 of 18 parameters
Parameter GB-L20 Tower T17 Difference
Usable energy 18.40 kWh 17.76 kWh 0.64 kWh apart
Continuous discharge power 20.48 kW 10.65 kW 9.83 kW more power
Nominal energy 20.45 kWh 17.76 kWh 2.69 kWh apart
Depth of discharge 90 % 100 % 10 pp more of the cells usable
Continuous charge power 20.48 kW 10.65 kW 9.83 kW faster charging
Power per kWh 1.11 kW/kWh 0.60 kW/kWh 0.51 kW/kWh more power for its size
Nominal voltage 512 V 480 V 32 V apart
Weight 214.0 kg 228.0 kg 14.0 kg lighter
Weight per kWh 11.6 kg/kWh 12.8 kg/kWh 1.2 kg/kWh lighter
Min operating temperature -20 °C -10 °C 10 °C more cold tolerant
Max operating temperature 60 °C 50 °C 10 °C more heat tolerant
Ingress protection IP65 IP54 IP65 vs IP54
Dimensions 1310x540x385 mm 1300x504x380 mm 1310x540x385 mm vs 1300x504x380 mm

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02

Full specification

Parameter GB-L20 Tower T17 Difference
Capacity
Usable energy 18.40 kWh 17.76 kWh 0.64 kWh apart
Nominal energy 20.45 kWh 17.76 kWh 2.69 kWh apart
Depth of discharge 90 % 100 % +10 pp for Tower T17
Max system capacity 24.5 kWh - Not published by Dyness
Modules per stack 2-6 2-6 Same
Power
Continuous discharge power 20.48 kW 10.65 kW +9.83 kW for GB-L20
Continuous charge power 20.48 kW 10.65 kW +9.83 kW for GB-L20
Peak discharge power 25.60 kW - Not published by Dyness
Power per kWh 1.11 kW/kWh 0.60 kW/kWh +0.51 kW/kWh for GB-L20
Efficiency and lifetime
Round-trip efficiency - - Neither datasheet publishes this
Cycle life 6000 cycles 6000 cycles Same
Cycle test depth - - Neither datasheet publishes this
Capacity at end of life 70 % - Not published by Dyness
Self-discharge - - Neither datasheet publishes this
Electrical
Voltage class High voltage High voltage Same
Nominal voltage 512 V 480 V 32 V apart
Operating voltage 166.4-700 V - Not published by Dyness
Cell chemistry LFP - Not published by Dyness
Active cell balancing - - Neither datasheet publishes this
Thermal management Yes - Not published by Dyness
Built-in inverter
Inverter None (battery only) None (battery only) Same
Inverter power - - Neither datasheet publishes this
Grid connection - - Neither datasheet publishes this
Backup power - - Neither datasheet publishes this
Physical
Weight 214.0 kg 228.0 kg -14.0 kg for GB-L20
Weight per kWh 11.6 kg/kWh 12.8 kg/kWh -1.2 kg/kWh for GB-L20
Dimensions 1310x540x385 mm 1300x504x380 mm 1310x540x385 mm vs 1300x504x380 mm
Ingress protection IP65 IP54 IP65 vs IP54
Outdoor-rated Yes - Not published by Dyness
Min operating temperature -20 °C -10 °C -10 °C for GB-L20
Max operating temperature 60 °C 50 °C +10 °C for GB-L20
Warranty
Warranty 10 yrs 10 yrs Same
Warranted throughput - - Neither datasheet publishes this
03

More useful comparisons

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Dyness Tower T17 vs FoxESS ECS2900-H7
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04

Written summary

Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate.