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Battery-Box Premium HVS 12.8 vs HS12.5 5 of 14 identical Swap Change batteries

BYD Battery-Box Premium HVS 12.8 vs FoxESS HS12.5

Battery-Box Premium HVS 12.8
12.8 kWh 96.0 % round-trip LFP HV
Open battery page Datasheet PDF
VS
HS12.5
11.91 kWh LFP HV
Open battery page Datasheet PDF
The verdict

HS12.5 leads on the differences that matter

The largest is usable energy: 0.89 kWh apart. 5 of 14 comparable parameters are identical, with 19 more left out because at least one datasheet does not publish them.

See all 9 differences
How alike are they
5 of 14 comparable
parameters are identical
identical differs not published
01

What actually differs

9 of 14 parameters
Parameter Battery-Box Premium HVS 12.8 HS12.5 Difference
Usable energy 12.80 kWh 11.91 kWh 0.89 kWh apart
Max system capacity 12.8 kWh 19.6 kWh 6.8 kWh more room to expand
Nominal energy 12.80 kWh 12.28 kWh 0.52 kWh apart
Nominal voltage 512 V 256 V 256 V apart
Cycle test depth 100 % 80 % 20 pp apart
Max operating temperature 50 °C 55 °C 5 °C more heat tolerant
Ingress protection IP55 IP21 IP55 vs IP21
Modules per stack 2-5 2-8 2-5 vs 2-8
Operating voltage 400-600 V 216-292 V 400-600 V vs 216-292 V
02

Price offers

1 shop we track
Shop Battery-Box Premium HVS 12.8 HS12.5 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 114 BYD offers · See 21 FoxESS offers

03

Full specification

Parameter Battery-Box Premium HVS 12.8 HS12.5 Difference
Capacity
Usable energy 12.80 kWh 11.91 kWh 0.89 kWh apart
Nominal energy 12.80 kWh 12.28 kWh 0.52 kWh apart
Depth of discharge 100 % - Not published by FoxESS
Max system capacity 12.8 kWh 19.6 kWh +6.8 kWh for HS12.5
Modules per stack 2-5 2-8 2-5 vs 2-8
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 % - Not published by FoxESS
Cycle life - 6000 cycles Not published by BYD
Cycle test depth 100 % 80 % 20 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 256 V 256 V apart
Operating voltage 400-600 V 216-292 V 400-600 V vs 216-292 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 - Not published by FoxESS
Weight per kWh 16.0 kg/kWh - Not published by FoxESS
Dimensions 1461x585x298 mm - Not published by FoxESS
Ingress protection IP55 IP21 IP55 vs IP21
Outdoor-rated Yes - Not published by FoxESS
Min operating temperature -10 °C -10 °C Same
Max operating temperature 50 °C 55 °C +5 °C for HS12.5
Warranty
Warranty 10 yrs 10 yrs Same
Warranted throughput - - Neither datasheet publishes this
04

More useful comparisons

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BYD Battery-Box Premium HVS 12.8 vs Pylontech Force H2 (FH9637M)
10 differences, the largest is nominal energy
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BYD Battery-Box Premium HVS 12.8 vs FoxESS ECS2900-H5
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BYD Battery-Box Premium HVS 12.8 vs SMA Home Storage 13.1
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FoxESS HS12.5 vs Solplanet Ai-HB 125A
8 differences, the largest is usable energy
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FoxESS HS12.5 vs FoxESS ECS4300H-H3
9 differences, the largest is usable energy
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FoxESS HS12.5 vs Pylontech Force H1 (5 modules)
7 differences, the largest is usable energy
05

Written summary

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