Skip to main content
Tower T17 vs GB-L20 5 of 18 identical Swap Change batteries

Dyness Tower T17 vs Deye GB-L20

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

Shop prices by brand: See 20 Dyness offers · See 44 Deye offers

02

Full specification

Parameter Tower T17 GB-L20 Difference
Capacity
Usable energy 17.76 kWh 18.40 kWh 0.64 kWh apart
Nominal energy 17.76 kWh 20.45 kWh 2.69 kWh apart
Depth of discharge 100 % 90 % +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 10.65 kW 20.48 kW +9.83 kW for GB-L20
Continuous charge power 10.65 kW 20.48 kW +9.83 kW for GB-L20
Peak discharge power - 25.60 kW Not published by Dyness
Power per kWh 0.60 kW/kWh 1.11 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 480 V 512 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 228.0 kg 214.0 kg -14.0 kg for GB-L20
Weight per kWh 12.8 kg/kWh 11.6 kg/kWh -1.2 kg/kWh for GB-L20
Dimensions 1300x504x380 mm 1310x540x385 mm 1300x504x380 mm vs 1310x540x385 mm
Ingress protection IP54 IP65 IP54 vs IP65
Outdoor-rated - Yes Not published by Dyness
Min operating temperature -10 °C -20 °C -10 °C for GB-L20
Max operating temperature 50 °C 60 °C +10 °C for GB-L20
Warranty
Warranty 10 yrs 10 yrs Same
Warranted throughput - - Neither datasheet publishes this
03

More useful comparisons

Open all batteries
Similar capacity
Dyness Tower T17 vs FoxESS ECS2900-H7
9 differences, the largest is usable energy
Similar capacity
Dyness Tower T17 vs Dyness Tower Pro TP19
14 differences, the largest is usable energy
Similar capacity
Dyness Tower T17 vs Deye GB-SL-EU (5 modules in series)
11 differences, the largest is usable energy
Similar capacity
Deye GB-L20 vs Solplanet Ai-HB 200A
11 differences, the largest is continuous discharge power
Similar capacity
Deye GB-L20 vs Deye BOS-G20
9 differences, the largest is max system capacity
04

Written summary

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