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ECS4300H-H7 vs BOS-G25 Pro 8 of 18 identical Swap Change batteries

FoxESS ECS4300H-H7 vs Deye BOS-G25 Pro

FoxESS ECS4300H-H7
ECS4300H-H7
26.13 kWh 95.0 % round-trip LFP HV
Open battery page Datasheet PDF
VS
Deye BOS-G25 Pro
BOS-G25 Pro
23.04 kWh LFP HV
Open battery page Datasheet PDF
The verdict

10 differences, and they point both ways

The largest is usable energy: 3.09 kWh apart. 8 of 18 comparable parameters are identical, with 15 more left out because at least one datasheet does not publish them.

See all 10 differences
How alike are they
8 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

10 of 18 parameters
Parameter ECS4300H-H7 BOS-G25 Pro Difference
Usable energy 26.13 kWh 23.04 kWh 3.09 kWh apart
Max system capacity 29.0 kWh 81.9 kWh 52.9 kWh more room to expand
Nominal energy 29.03 kWh 25.60 kWh 3.43 kWh apart
Nominal voltage 403 V 256 V 147 V apart
Weight 263.5 kg 290.0 kg 26.5 kg lighter
Weight per kWh 10.1 kg/kWh 12.6 kg/kWh 2.5 kg/kWh lighter
Ingress protection IP65 IP20 (battery enclosure) IP65 vs IP20 (battery enclosure)
Modules per stack 2-7 5-16 2-7 vs 5-16
Operating voltage 340.2-459.9 V 220-292 V 340.2-459.9 V vs 220-292 V
Dimensions 1006x570x380 mm 1629x530x602 mm 1006x570x380 mm vs 1629x530x602 mm

Shop prices by brand: See 21 FoxESS offers · See 44 Deye offers

02

Full specification

Parameter ECS4300H-H7 BOS-G25 Pro Difference
Capacity
Usable energy 26.13 kWh 23.04 kWh 3.09 kWh apart
Nominal energy 29.03 kWh 25.60 kWh 3.43 kWh apart
Depth of discharge 90 % 90 % Same
Max system capacity 29.0 kWh 81.9 kWh +52.9 kWh for BOS-G25 Pro
Modules per stack 2-7 5-16 2-7 vs 5-16
Power
Continuous discharge power - 25.60 kW Not published by FoxESS
Continuous charge power - 25.60 kW Not published by FoxESS
Peak discharge power - 32.00 kW Not published by FoxESS
Power per kWh - 1.11 kW/kWh Not published by FoxESS
Efficiency and lifetime
Round-trip efficiency 95.0 % - Not published by Deye
Cycle life 6000 cycles 6000 cycles Same
Cycle test depth 90 % 90 % Same
Capacity at end of life - 70 % Not published by FoxESS
Self-discharge - - Neither datasheet publishes this
Electrical
Voltage class High voltage High voltage Same
Nominal voltage 403 V 256 V 147 V apart
Operating voltage 340.2-459.9 V 220-292 V 340.2-459.9 V vs 220-292 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 263.5 kg 290.0 kg -26.5 kg for ECS4300H-H7
Weight per kWh 10.1 kg/kWh 12.6 kg/kWh -2.5 kg/kWh for ECS4300H-H7
Dimensions 1006x570x380 mm 1629x530x602 mm 1006x570x380 mm vs 1629x530x602 mm
Ingress protection IP65 IP20 (battery enclosure) IP65 vs IP20 (battery enclosure)
Outdoor-rated Yes - Not published by Deye
Min operating temperature -20 °C -20 °C Same
Max operating temperature 55 °C 55 °C Same
Warranty
Warranty - 10 yrs Not published by FoxESS
Warranted throughput - - Neither datasheet publishes this
03

More useful comparisons

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Deye BOS-G25 Pro vs Deye GB-L (6 modules in series)
14 differences, the largest is usable energy
04

Written summary

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