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ECS2900-H3 vs ECS4300H-H2 12 of 20 identical Swap Change batteries

FoxESS ECS2900-H3 vs FoxESS ECS4300H-H2

FoxESS ECS2900-H3
ECS2900-H3
7.78 kWh 95.0 % round-trip LFP HV
Open battery page Datasheet PDF
VS
FoxESS ECS4300H-H2
ECS4300H-H2
7.46 kWh 95.0 % round-trip LFP HV
Open battery page Datasheet PDF
The verdict

ECS4300H-H2 leads on the differences that matter

The largest is usable energy: 0.32 kWh apart. 12 of 20 comparable parameters are identical, with 13 more left out because at least one datasheet does not publish them.

See all 8 differences
How alike are they
12 of 20 comparable
parameters are identical
identical differs not published
01

What actually differs

8 of 20 parameters
Parameter ECS2900-H3 ECS4300H-H2 Difference
Usable energy 7.78 kWh 7.46 kWh 0.32 kWh apart
Max system capacity 20.2 kWh 29.0 kWh 8.8 kWh more room to expand
Nominal energy 8.64 kWh 8.29 kWh 0.35 kWh apart
Nominal voltage 173 V 115 V 58 V apart
Weight 100.3 kg 78.5 kg 21.8 kg lighter
Weight per kWh 12.9 kg/kWh 10.5 kg/kWh 2.4 kg/kWh lighter
Operating voltage 145.8-197.1 V 97.2-131.4 V 145.8-197.1 V vs 97.2-131.4 V
Dimensions 470x570x380 mm 366x570x380 mm 470x570x380 mm vs 366x570x380 mm

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02

Full specification

Parameter ECS2900-H3 ECS4300H-H2 Difference
Capacity
Usable energy 7.78 kWh 7.46 kWh 0.32 kWh apart
Nominal energy 8.64 kWh 8.29 kWh 0.35 kWh apart
Depth of discharge 90 % 90 % Same
Max system capacity 20.2 kWh 29.0 kWh +8.8 kWh for ECS4300H-H2
Modules per stack 2-7 2-7 Same
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 % 95.0 % Same
Cycle life 6000 cycles 6000 cycles Same
Cycle test depth 90 % 90 % Same
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 173 V 115 V 58 V apart
Operating voltage 145.8-197.1 V 97.2-131.4 V 145.8-197.1 V vs 97.2-131.4 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 100.3 kg 78.5 kg -21.8 kg for ECS4300H-H2
Weight per kWh 12.9 kg/kWh 10.5 kg/kWh -2.4 kg/kWh for ECS4300H-H2
Dimensions 470x570x380 mm 366x570x380 mm 470x570x380 mm vs 366x570x380 mm
Ingress protection IP65 IP65 Same
Outdoor-rated Yes Yes Same
Min operating temperature -20 °C -20 °C Same
Max operating temperature 55 °C 55 °C Same
Warranty
Warranty - - Neither datasheet publishes this
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.