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HS12.5 vs ECS4300H-H3 5 of 14 identical Swap Change batteries

FoxESS HS12.5 vs FoxESS ECS4300H-H3

HS12.5
11.91 kWh LFP HV
Open battery page Datasheet PDF
VS
FoxESS ECS4300H-H3
ECS4300H-H3
11.2 kWh 95.0 % round-trip LFP HV
Open battery page Datasheet PDF
The verdict

ECS4300H-H3 leads on the differences that matter

The largest is usable energy: 0.71 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 HS12.5 ECS4300H-H3 Difference
Usable energy 11.91 kWh 11.20 kWh 0.71 kWh apart
Max system capacity 19.6 kWh 29.0 kWh 9.4 kWh more room to expand
Nominal voltage 256 V 173 V 83 V apart
Min operating temperature -10 °C -20 °C 10 °C more cold tolerant
Nominal energy 12.28 kWh 12.44 kWh 0.16 kWh apart
Cycle test depth 80 % 90 % 10 pp apart
Ingress protection IP21 IP65 IP21 vs IP65
Modules per stack 2-8 2-7 2-8 vs 2-7
Operating voltage 216-292 V 145.8-197.1 V 216-292 V vs 145.8-197.1 V

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02

Full specification

Parameter HS12.5 ECS4300H-H3 Difference
Capacity
Usable energy 11.91 kWh 11.20 kWh 0.71 kWh apart
Nominal energy 12.28 kWh 12.44 kWh 0.16 kWh apart
Depth of discharge - 90 % Not published by FoxESS
Max system capacity 19.6 kWh 29.0 kWh +9.4 kWh for ECS4300H-H3
Modules per stack 2-8 2-7 2-8 vs 2-7
Power
Continuous discharge power - - Neither datasheet publishes this
Continuous charge power - - Neither datasheet publishes this
Peak discharge power - - Neither datasheet publishes this
Power per kWh - - Neither datasheet publishes this
Efficiency and lifetime
Round-trip efficiency - 95.0 % Not published by FoxESS
Cycle life 6000 cycles 6000 cycles Same
Cycle test depth 80 % 90 % 10 pp apart
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 256 V 173 V 83 V apart
Operating voltage 216-292 V 145.8-197.1 V 216-292 V vs 145.8-197.1 V
Cell chemistry LFP LFP Same
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 - 115.5 kg Not published by FoxESS
Weight per kWh - 10.3 kg/kWh Not published by FoxESS
Dimensions - 494x570x380 mm Not published by FoxESS
Ingress protection IP21 IP65 IP21 vs IP65
Outdoor-rated - Yes Not published by FoxESS
Min operating temperature -10 °C -20 °C -10 °C for ECS4300H-H3
Max operating temperature 55 °C 55 °C Same
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.