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Battery-Box Premium HVS 12.8 vs ECS2900-H5 4 of 19 identical Swap Change batteries

BYD Battery-Box Premium HVS 12.8 vs FoxESS ECS2900-H5

Battery-Box Premium HVS 12.8
12.8 kWh 96.0 % round-trip LFP HV
Open battery page Datasheet PDF
VS
FoxESS ECS2900-H5
ECS2900-H5
12.96 kWh 95.0 % round-trip LFP HV
Open battery page Datasheet PDF
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 differences
How alike are they
4 of 19 comparable
parameters are identical
identical differs not published
01

What actually differs

15 of 19 parameters
Parameter Battery-Box Premium HVS 12.8 ECS2900-H5 Difference
Usable energy 12.80 kWh 12.96 kWh 0.16 kWh apart
Max system capacity 12.8 kWh 20.2 kWh 7.4 kWh more room to expand
Round-trip efficiency 96.0 % 95.0 % 1.0 pp less lost per cycle
Nominal energy 12.80 kWh 14.40 kWh 1.60 kWh apart
Depth of discharge 100 % 90 % 10 pp more of the cells usable
Nominal voltage 512 V 288 V 224 V apart
Weight 205.0 kg 164.3 kg 40.7 kg lighter
Weight per kWh 16.0 kg/kWh 12.7 kg/kWh 3.3 kg/kWh lighter
Min operating temperature -10 °C -20 °C 10 °C more cold tolerant
Cycle test depth 100 % 90 % 10 pp apart
Max operating temperature 50 °C 55 °C 5 °C more heat tolerant
Ingress protection IP55 IP65 IP55 vs IP65
Modules per stack 2-5 2-7 2-5 vs 2-7
Operating voltage 400-600 V 243-328.5 V 400-600 V vs 243-328.5 V
Dimensions 1461x585x298 mm 710x570x380 mm 1461x585x298 mm vs 710x570x380 mm
02

Price offers

1 shop we track
Shop Battery-Box Premium HVS 12.8 ECS2900-H5 At this shop
Solaris Energy Poland 21 370 zł incl. VAT - Only Battery-Box Premium HVS 12.8

All 1 offer for Battery-Box Premium HVS 12.8

Shop prices by brand: See 121 BYD offers · See 21 FoxESS offers

03

Full specification

Parameter Battery-Box Premium HVS 12.8 ECS2900-H5 Difference
Capacity
Usable energy 12.80 kWh 12.96 kWh 0.16 kWh apart
Nominal energy 12.80 kWh 14.40 kWh 1.60 kWh apart
Depth of discharge 100 % 90 % +10 pp for Battery-Box Premium HVS 12.8
Max system capacity 12.8 kWh 20.2 kWh +7.4 kWh for ECS2900-H5
Modules per stack 2-5 2-7 2-5 vs 2-7
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 96.0 % 95.0 % +1.0 pp for Battery-Box Premium HVS 12.8
Cycle life - 6000 cycles Not published by BYD
Cycle test depth 100 % 90 % 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 512 V 288 V 224 V apart
Operating voltage 400-600 V 243-328.5 V 400-600 V vs 243-328.5 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 205.0 kg 164.3 kg -40.7 kg for ECS2900-H5
Weight per kWh 16.0 kg/kWh 12.7 kg/kWh -3.3 kg/kWh for ECS2900-H5
Dimensions 1461x585x298 mm 710x570x380 mm 1461x585x298 mm vs 710x570x380 mm
Ingress protection IP55 IP65 IP55 vs IP65
Outdoor-rated Yes Yes Same
Min operating temperature -10 °C -20 °C -10 °C for ECS2900-H5
Max operating temperature 50 °C 55 °C +5 °C for ECS2900-H5
Warranty
Warranty 10 yrs - Not published by FoxESS
Warranted throughput - - Neither datasheet publishes this
04

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BYD Battery-Box Premium HVS 12.8 vs FoxESS HS12.5
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FoxESS ECS2900-H5 vs BYD Battery-Box Premium HVM 13.8
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05

Written summary

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