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SigenStor BAT stack (6 modules) vs BOS-A (7 modules in series) 5 of 12 identical Swap Change batteries

Sigenergy SigenStor BAT stack (6 modules) vs Deye BOS-A (7 modules in series)

Sigenergy SigenStor BAT stack (6 modules)
SigenStor BAT stack (6 modules)
48.36 kWh LFP
Open battery page Datasheet PDF
VS
Deye BOS-A (7 modules in series)
BOS-A (7 modules in series)
48.38 kWh LFP HV
Open battery page Datasheet PDF
The verdict

7 differences, and they point both ways

The largest is max system capacity: 128.3 kWh more room to expand. 5 of 12 comparable parameters are identical, with 21 more left out because at least one datasheet does not publish them.

See all 7 differences
How alike are they
5 of 12 comparable
parameters are identical
identical differs not published
01

What actually differs

7 of 12 parameters
Parameter SigenStor BAT stack (6 modules) BOS-A (7 modules in series) Difference
Max system capacity 48.4 kWh 176.6 kWh 128.3 kWh more room to expand
Nominal energy 48.36 kWh 53.76 kWh 5.40 kWh apart
Weight 456.0 kg 538.0 kg 82.0 kg lighter
Weight per kWh 9.4 kg/kWh 11.1 kg/kWh 1.7 kg/kWh lighter
Ingress protection IP66 IP20 IP66 vs IP20
Modules per stack 1-6 7-23 1-6 vs 7-23
Dimensions 1990x850x260 mm 1351x629x605 mm 1990x850x260 mm vs 1351x629x605 mm

Shop prices by brand: See 15 Sigenergy offers · See 44 Deye offers

02

Full specification

Parameter SigenStor BAT stack (6 modules) BOS-A (7 modules in series) Difference
Capacity
Usable energy 48.36 kWh 48.38 kWh Effectively the same
Nominal energy 48.36 kWh 53.76 kWh 5.40 kWh apart
Depth of discharge - 90 % Not published by Sigenergy
Max system capacity 48.4 kWh 176.6 kWh +128.3 kWh for BOS-A (7 modules in series)
Modules per stack 1-6 7-23 1-6 vs 7-23
Power
Continuous discharge power 24.00 kW - Not published by Deye
Continuous charge power 24.00 kW - Not published by Deye
Peak discharge power 36.00 kW - Not published by Deye
Power per kWh 0.50 kW/kWh - Not published by Deye
Efficiency and lifetime
Round-trip efficiency - - Neither datasheet publishes this
Cycle life - 6000 cycles Not published by Sigenergy
Cycle test depth - 90 % Not published by Sigenergy
Capacity at end of life - 70 % Not published by Sigenergy
Self-discharge - - Neither datasheet publishes this
Electrical
Voltage class - High voltage Not published by Sigenergy
Nominal voltage - 269 V Not published by Sigenergy
Operating voltage - 235.2-302.4 V Not published by Sigenergy
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 456.0 kg 538.0 kg -82.0 kg for SigenStor BAT stack (6 modules)
Weight per kWh 9.4 kg/kWh 11.1 kg/kWh -1.7 kg/kWh for SigenStor BAT stack (6 modules)
Dimensions 1990x850x260 mm 1351x629x605 mm 1990x850x260 mm vs 1351x629x605 mm
Ingress protection IP66 IP20 IP66 vs IP20
Outdoor-rated - - Neither datasheet publishes this
Min operating temperature -20 °C -20 °C Same
Max operating temperature 55 °C 55 °C Same
Warranty
Warranty - 10 yrs Not published by Sigenergy
Warranted throughput - - Neither datasheet publishes this
03

More useful comparisons

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Sigenergy SigenStor BAT stack (6 modules) vs Sigenergy SigenStor BAT 8.0 system (6 modules)
3 differences, the largest is usable energy
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Sigenergy SigenStor BAT stack (6 modules) vs Sigenergy SigenStor BAT stack (5 modules)
7 differences, the largest is usable energy
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Sigenergy SigenStor BAT stack (6 modules) vs Sigenergy SigenStor BAT 8.0 system (5 modules)
9 differences, the largest is usable energy
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Deye BOS-A (7 modules in series) vs Deye BOS-G50
9 differences, the largest is usable energy
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Deye BOS-A (7 modules in series) vs Deye BOS-G55
9 differences, the largest is usable energy
Similar capacity
Deye BOS-A (7 modules in series) vs Deye BOS-G45
9 differences, the largest is usable energy
04

Written summary

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