FoxESS ECS2900-H6 vs BYD Battery-Box Premium HVM 16.6
VS
The verdict
Battery-Box Premium HVM 16.6 leads on the differences that matter
The largest is usable energy: 1.01 kWh apart. 3 of 12 comparable parameters are identical, with 21 more left out because at least one datasheet does not publish them.
See all 9 differencesHow alike are they
3
of 12 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
9 of 12 parameters
What actually differs
Parameter
ECS2900-H6
Battery-Box Premium HVM 16.6
Difference
Usable energy
15.55 kWh
16.56 kWh
1.01 kWh apart
Max system capacity
20.2 kWh
49.7 kWh
29.5 kWh more room to expand
Round-trip efficiency
95.0 %
96.0 %
1.0 pp less lost per cycle
Nominal voltage
346 V
307 V
38 V apart
Min operating temperature
-20 °C
-10 °C
10 °C more cold tolerant
Max operating temperature
55 °C
50 °C
5 °C more heat tolerant
Ingress protection
IP65
IP55
IP65 vs IP55
Operating voltage
291.6-394.2 V
240-354 V
291.6-394.2 V vs 240-354 V
Dimensions
830x570x380 mm
1694x585x298 mm
830x570x380 mm vs 1694x585x298 mm
02
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ECS2900-H6
Battery-Box Premium HVM 16.6
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Shop prices by brand: See 21 FoxESS offers · See 121 BYD offers
03
Full specification
Parameter
ECS2900-H6
Battery-Box Premium HVM 16.6
Difference
Capacity
Usable energy
15.55 kWh
16.56 kWh
1.01 kWh apart
Nominal energy
17.28 kWh
-
Not published by BYD
Depth of discharge
90 %
-
Not published by BYD
Max system capacity
20.2 kWh
49.7 kWh
+29.5 kWh for Battery-Box Premium HVM 16.6
Modules per stack
2-7
-
Not published by BYD
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 %
96.0 %
+1.0 pp for Battery-Box Premium HVM 16.6
Cycle life
6000 cycles
-
Not published by BYD
Cycle test depth
90 %
-
Not published by BYD
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
307 V
38 V apart
Operating voltage
291.6-394.2 V
240-354 V
291.6-394.2 V vs 240-354 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
-
Not published by BYD
Weight per kWh
12.6 kg/kWh
-
Not published by BYD
Dimensions
830x570x380 mm
1694x585x298 mm
830x570x380 mm vs 1694x585x298 mm
Ingress protection
IP65
IP55
IP65 vs IP55
Outdoor-rated
Yes
-
Not published by BYD
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.