FoxESS ECS2900-H6 vs SMA Home Storage 16.4
VS
The verdict
14 differences, and they point both ways
The largest is usable energy: 0.85 kWh apart. 5 of 19 comparable parameters are identical, with 14 more left out because at least one datasheet does not publish them.
See all 14 differencesHow alike are they
5
of 19 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
14 of 19 parameters
What actually differs
Parameter
ECS2900-H6
SMA Home Storage 16.4
Difference
Usable energy
15.55 kWh
16.40 kWh
0.85 kWh apart
Cycle life
6000 cycles
8000 cycles
2000 cycles more
Max system capacity
20.2 kWh
16.4 kWh
3.8 kWh more room to expand
Nominal energy
17.28 kWh
16.40 kWh
0.88 kWh apart
Depth of discharge
90 %
100 %
10 pp more of the cells usable
Nominal voltage
346 V
480 V
134 V apart
Weight
196.3 kg
190.0 kg
6.3 kg lighter
Min operating temperature
-20 °C
-10 °C
10 °C more cold tolerant
Weight per kWh
12.6 kg/kWh
11.6 kg/kWh
1.0 kg/kWh lighter
Round-trip efficiency
95.0 %
94.5 %
0.5 pp less lost per cycle
Cycle test depth
90 %
100 %
10 pp apart
Max operating temperature
55 °C
50 °C
5 °C more heat tolerant
Modules per stack
2-7
1-5
2-7 vs 1-5
Operating voltage
291.6-394.2 V
450-540 V
291.6-394.2 V vs 450-540 V
02
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ECS2900-H6
SMA Home Storage 16.4
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03
Full specification
Parameter
ECS2900-H6
SMA Home Storage 16.4
Difference
Capacity
Usable energy
15.55 kWh
16.40 kWh
0.85 kWh apart
Nominal energy
17.28 kWh
16.40 kWh
0.88 kWh apart
Depth of discharge
90 %
100 %
+10 pp for SMA Home Storage 16.4
Max system capacity
20.2 kWh
16.4 kWh
+3.8 kWh for ECS2900-H6
Modules per stack
2-7
1-5
2-7 vs 1-5
Power
Continuous discharge power
-
17.28 kW
Not published by FoxESS
Continuous charge power
-
17.28 kW
Not published by FoxESS
Peak discharge power
-
-
Neither datasheet publishes this
Power per kWh
-
1.05 kW/kWh
Not published by FoxESS
Efficiency and lifetime
Round-trip efficiency
95.0 %
94.5 %
+0.5 pp for ECS2900-H6
Cycle life
6000 cycles
8000 cycles
+2000 cycles for SMA Home Storage 16.4
Cycle test depth
90 %
100 %
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
346 V
480 V
134 V apart
Operating voltage
291.6-394.2 V
450-540 V
291.6-394.2 V vs 450-540 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
196.3 kg
190.0 kg
-6.3 kg for SMA Home Storage 16.4
Weight per kWh
12.6 kg/kWh
11.6 kg/kWh
-1.0 kg/kWh for SMA Home Storage 16.4
Dimensions
830x570x380 mm
-
Not published by SMA Solar
Ingress protection
IP65
IP65
Same
Outdoor-rated
Yes
Yes
Same
Min operating temperature
-20 °C
-10 °C
-10 °C for ECS2900-H6
Max operating temperature
55 °C
50 °C
+5 °C for ECS2900-H6
Warranty
Warranty
-
10 yrs
Not published by FoxESS
Warranted throughput
-
-
Neither datasheet publishes this
04
Open all batteries
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05
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.