FoxESS ECS2900-H5 vs BYD Battery-Box Premium HVS 12.8
VS
The verdict
ECS2900-H5 leads on the differences that matter
The largest is usable energy: 0.16 kWh apart. 4 of 19 comparable parameters are identical, with 14 more left out because at least one datasheet does not publish them.
See all 15 differencesHow alike are they
4
of 19 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
15 of 19 parameters
What actually differs
Parameter
ECS2900-H5
Battery-Box Premium HVS 12.8
Difference
Usable energy
12.96 kWh
12.80 kWh
0.16 kWh apart
Max system capacity
20.2 kWh
12.8 kWh
7.4 kWh more room to expand
Round-trip efficiency
95.0 %
96.0 %
1.0 pp less lost per cycle
Nominal energy
14.40 kWh
12.80 kWh
1.60 kWh apart
Depth of discharge
90 %
100 %
10 pp more of the cells usable
Nominal voltage
288 V
512 V
224 V apart
Weight
164.3 kg
205.0 kg
40.7 kg lighter
Weight per kWh
12.7 kg/kWh
16.0 kg/kWh
3.3 kg/kWh lighter
Min operating temperature
-20 °C
-10 °C
10 °C more cold tolerant
Cycle test depth
90 %
100 %
10 pp apart
Max operating temperature
55 °C
50 °C
5 °C more heat tolerant
Ingress protection
IP65
IP55
IP65 vs IP55
Modules per stack
2-7
2-5
2-7 vs 2-5
Operating voltage
243-328.5 V
400-600 V
243-328.5 V vs 400-600 V
Dimensions
710x570x380 mm
1461x585x298 mm
710x570x380 mm vs 1461x585x298 mm
02
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Price offers
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ECS2900-H5
Battery-Box Premium HVS 12.8
At this shop
Shop prices by brand: See 21 FoxESS offers · See 121 BYD offers
03
Full specification
Parameter
ECS2900-H5
Battery-Box Premium HVS 12.8
Difference
Capacity
Usable energy
12.96 kWh
12.80 kWh
0.16 kWh apart
Nominal energy
14.40 kWh
12.80 kWh
1.60 kWh apart
Depth of discharge
90 %
100 %
+10 pp for Battery-Box Premium HVS 12.8
Max system capacity
20.2 kWh
12.8 kWh
+7.4 kWh for ECS2900-H5
Modules per stack
2-7
2-5
2-7 vs 2-5
Power
Continuous discharge power
-
12.80 kW
Not published by FoxESS
Continuous charge power
-
12.80 kW
Not published by FoxESS
Peak discharge power
-
25.60 kW
Not published by FoxESS
Power per kWh
-
1.00 kW/kWh
Not published by FoxESS
Efficiency and lifetime
Round-trip efficiency
95.0 %
96.0 %
+1.0 pp for Battery-Box Premium HVS 12.8
Cycle life
6000 cycles
-
Not published by BYD
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
288 V
512 V
224 V apart
Operating voltage
243-328.5 V
400-600 V
243-328.5 V vs 400-600 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
164.3 kg
205.0 kg
-40.7 kg for ECS2900-H5
Weight per kWh
12.7 kg/kWh
16.0 kg/kWh
-3.3 kg/kWh for ECS2900-H5
Dimensions
710x570x380 mm
1461x585x298 mm
710x570x380 mm vs 1461x585x298 mm
Ingress protection
IP65
IP55
IP65 vs IP55
Outdoor-rated
Yes
Yes
Same
Min operating temperature
-20 °C
-10 °C
-10 °C for ECS2900-H5
Max operating temperature
55 °C
50 °C
+5 °C for ECS2900-H5
Warranty
Warranty
-
10 yrs
Not published by FoxESS
Warranted throughput
-
-
Neither datasheet publishes this
04
Open all batteries
More useful comparisons
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FoxESS ECS2900-H5 vs BYD Battery-Box Premium HVM 13.8
9 differences, the largest is usable energy
Similar capacity
BYD Battery-Box Premium HVS 12.8 vs FoxESS HS12.5
9 differences, the largest is usable energy
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.