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

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

HS12.5
11.91 kWh LFP HV
Open battery page Datasheet PDF
VS
Battery-Box Premium HVS 12.8
12.8 kWh 96.0 % round-trip 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 HS12.5 Battery-Box Premium HVS 12.8 Difference
Usable energy 11.91 kWh 12.80 kWh 0.89 kWh apart
Max system capacity 19.6 kWh 12.8 kWh 6.8 kWh more room to expand
Nominal energy 12.28 kWh 12.80 kWh 0.52 kWh apart
Nominal voltage 256 V 512 V 256 V apart
Cycle test depth 80 % 100 % 20 pp apart
Max operating temperature 55 °C 50 °C 5 °C more heat tolerant
Ingress protection IP21 IP55 IP21 vs IP55
Modules per stack 2-8 2-5 2-8 vs 2-5
Operating voltage 216-292 V 400-600 V 216-292 V vs 400-600 V
02

Price offers

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

03

Full specification

Parameter HS12.5 Battery-Box Premium HVS 12.8 Difference
Capacity
Usable energy 11.91 kWh 12.80 kWh 0.89 kWh apart
Nominal energy 12.28 kWh 12.80 kWh 0.52 kWh apart
Depth of discharge - 100 % Not published by FoxESS
Max system capacity 19.6 kWh 12.8 kWh +6.8 kWh for HS12.5
Modules per stack 2-8 2-5 2-8 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 - 96.0 % Not published by FoxESS
Cycle life 6000 cycles - Not published by BYD
Cycle test depth 80 % 100 % 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 256 V 512 V 256 V apart
Operating voltage 216-292 V 400-600 V 216-292 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 - 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 IP21 IP55 IP21 vs IP55
Outdoor-rated - Yes Not published by FoxESS
Min operating temperature -10 °C -10 °C Same
Max operating temperature 55 °C 50 °C +5 °C for HS12.5
Warranty
Warranty 10 yrs 10 yrs Same
Warranted throughput - - Neither datasheet publishes this
04

More useful comparisons

Open all batteries
Similar capacity
FoxESS HS12.5 vs Solplanet Ai-HB 125A
8 differences, the largest is usable energy
Similar capacity
FoxESS HS12.5 vs FoxESS ECS4300H-H3
9 differences, the largest is usable energy
Similar capacity
FoxESS HS12.5 vs Pylontech Force H1 (5 modules)
7 differences, the largest is usable energy
Similar capacity
BYD Battery-Box Premium HVS 12.8 vs Pylontech Force H2 (FH9637M)
10 differences, the largest is nominal energy
Similar capacity
BYD Battery-Box Premium HVS 12.8 vs FoxESS ECS2900-H5
15 differences, the largest is usable energy
Similar capacity
BYD Battery-Box Premium HVS 12.8 vs SMA Home Storage 13.1
13 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.