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Tower T17 vs ECS2900-H7 5 of 14 identical Swap Change batteries

Dyness Tower T17 vs FoxESS ECS2900-H7

Tower T17
17.76 kWh HV
Open battery page Datasheet PDF
VS
FoxESS ECS2900-H7
ECS2900-H7
18.14 kWh 95.0 % round-trip LFP HV
Open battery page Datasheet PDF
The verdict

ECS2900-H7 leads on the differences that matter

The largest is usable energy: 0.38 kWh apart. 5 of 14 comparable parameters are identical, with 19 more left out because at least one datasheet does not publish them.

See all 9 differences
How alike are they
5 of 14 comparable
parameters are identical
identical differs not published
01

What actually differs

9 of 14 parameters
Parameter Tower T17 ECS2900-H7 Difference
Usable energy 17.76 kWh 18.14 kWh 0.38 kWh apart
Nominal energy 17.76 kWh 20.16 kWh 2.40 kWh apart
Depth of discharge 100 % 90 % 10 pp more of the cells usable
Nominal voltage 480 V 403 V 77 V apart
Min operating temperature -10 °C -20 °C 10 °C more cold tolerant
Max operating temperature 50 °C 55 °C 5 °C more heat tolerant
Ingress protection IP54 IP65 IP54 vs IP65
Modules per stack 2-6 2-7 2-6 vs 2-7
Dimensions 1300x504x380 mm 950x570x380 mm 1300x504x380 mm vs 950x570x380 mm

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02

Full specification

Parameter Tower T17 ECS2900-H7 Difference
Capacity
Usable energy 17.76 kWh 18.14 kWh 0.38 kWh apart
Nominal energy 17.76 kWh 20.16 kWh 2.40 kWh apart
Depth of discharge 100 % 90 % +10 pp for Tower T17
Max system capacity - 20.2 kWh Not published by Dyness
Modules per stack 2-6 2-7 2-6 vs 2-7
Power
Continuous discharge power 10.65 kW - Not published by FoxESS
Continuous charge power 10.65 kW - Not published by FoxESS
Peak discharge power - - Neither datasheet publishes this
Power per kWh 0.60 kW/kWh - Not published by FoxESS
Efficiency and lifetime
Round-trip efficiency - 95.0 % Not published by Dyness
Cycle life 6000 cycles 6000 cycles Same
Cycle test depth - 90 % Not published by Dyness
Capacity at end of life - - Neither datasheet publishes this
Self-discharge - - Neither datasheet publishes this
Electrical
Voltage class High voltage High voltage Same
Nominal voltage 480 V 403 V 77 V apart
Operating voltage - 340.2-459.9 V Not published by Dyness
Cell chemistry - LFP Not published by Dyness
Active cell balancing - - Neither datasheet publishes this
Thermal management - - Neither datasheet publishes this
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 228.3 kg Effectively the same
Weight per kWh 12.8 kg/kWh 12.6 kg/kWh Effectively the same
Dimensions 1300x504x380 mm 950x570x380 mm 1300x504x380 mm vs 950x570x380 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 ECS2900-H7
Max operating temperature 50 °C 55 °C +5 °C for ECS2900-H7
Warranty
Warranty 10 yrs - Not published by FoxESS
Warranted throughput - - Neither datasheet publishes this
03

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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.