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

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

Deye BOS-A (7 modules in series)
BOS-A (7 modules in series)
48.38 kWh LFP HV
Open battery page Datasheet PDF
VS
Sigenergy SigenStor BAT stack (6 modules)
SigenStor BAT stack (6 modules)
48.36 kWh LFP
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 BOS-A (7 modules in series) SigenStor BAT stack (6 modules) Difference
Max system capacity 176.6 kWh 48.4 kWh 128.3 kWh more room to expand
Nominal energy 53.76 kWh 48.36 kWh 5.40 kWh apart
Weight 538.0 kg 456.0 kg 82.0 kg lighter
Weight per kWh 11.1 kg/kWh 9.4 kg/kWh 1.7 kg/kWh lighter
Ingress protection IP20 IP66 IP20 vs IP66
Modules per stack 7-23 1-6 7-23 vs 1-6
Dimensions 1351x629x605 mm 1990x850x260 mm 1351x629x605 mm vs 1990x850x260 mm

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

02

Full specification

Parameter BOS-A (7 modules in series) SigenStor BAT stack (6 modules) Difference
Capacity
Usable energy 48.38 kWh 48.36 kWh Effectively the same
Nominal energy 53.76 kWh 48.36 kWh 5.40 kWh apart
Depth of discharge 90 % - Not published by Sigenergy
Max system capacity 176.6 kWh 48.4 kWh +128.3 kWh for BOS-A (7 modules in series)
Modules per stack 7-23 1-6 7-23 vs 1-6
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 538.0 kg 456.0 kg -82.0 kg for SigenStor BAT stack (6 modules)
Weight per kWh 11.1 kg/kWh 9.4 kg/kWh -1.7 kg/kWh for SigenStor BAT stack (6 modules)
Dimensions 1351x629x605 mm 1990x850x260 mm 1351x629x605 mm vs 1990x850x260 mm
Ingress protection IP20 IP66 IP20 vs IP66
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 (5 modules)
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04

Written summary

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