FoxESS ECS4300H-H7 vs Deye AI-W5.1-B (6 modules)
VS
The verdict
ECS4300H-H7 leads on the differences that matter
The largest is usable energy: 1.47 kWh apart. 7 of 18 comparable parameters are identical, with 15 more left out because at least one datasheet does not publish them.
See all 11 differencesHow alike are they
7
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
11 of 18 parameters
What actually differs
Parameter
ECS4300H-H7
AI-W5.1-B (6 modules)
Difference
Usable energy
26.13 kWh
27.60 kWh
1.47 kWh apart
Max system capacity
29.0 kWh
30.7 kWh
1.7 kWh more room to expand
Nominal energy
29.03 kWh
30.72 kWh
1.69 kWh apart
Nominal voltage
403 V
51 V
352 V apart
Weight
263.5 kg
339.5 kg
76.0 kg lighter
Weight per kWh
10.1 kg/kWh
12.3 kg/kWh
2.2 kg/kWh lighter
Voltage class
High voltage
Low voltage
High voltage vs Low voltage
Ingress protection
IP65
IP65 (after stacking)
IP65 vs IP65 (after stacking)
Modules per stack
2-7
1-6
2-7 vs 1-6
Operating voltage
340.2-459.9 V
43.2-57.6 V
340.2-459.9 V vs 43.2-57.6 V
Dimensions
1006x570x380 mm
1974x720x255 mm
1006x570x380 mm vs 1974x720x255 mm
Shop prices by brand: See 31 FoxESS offers · See 44 Deye offers
02
Full specification
Parameter
ECS4300H-H7
AI-W5.1-B (6 modules)
Difference
Capacity
Usable energy
26.13 kWh
27.60 kWh
1.47 kWh apart
Nominal energy
29.03 kWh
30.72 kWh
1.69 kWh apart
Depth of discharge
90 %
90 %
Same
Max system capacity
29.0 kWh
30.7 kWh
+1.7 kWh for AI-W5.1-B (6 modules)
Modules per stack
2-7
1-6
2-7 vs 1-6
Power
Continuous discharge power
-
12.80 kW
Not published by FoxESS
Continuous charge power
-
12.80 kW
Not published by FoxESS
Peak discharge power
-
18.43 kW
Not published by FoxESS
Power per kWh
-
0.46 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
Low voltage
High voltage vs Low voltage
Nominal voltage
403 V
51 V
352 V apart
Operating voltage
340.2-459.9 V
43.2-57.6 V
340.2-459.9 V vs 43.2-57.6 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
339.5 kg
-76.0 kg for ECS4300H-H7
Weight per kWh
10.1 kg/kWh
12.3 kg/kWh
-2.2 kg/kWh for ECS4300H-H7
Dimensions
1006x570x380 mm
1974x720x255 mm
1006x570x380 mm vs 1974x720x255 mm
Ingress protection
IP65
IP65 (after stacking)
IP65 vs IP65 (after stacking)
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
-
16.0 MWh
Not published by FoxESS
03
Open all batteries
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04
Written summary
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Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate.