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BOS-G40 Pro vs SigenStor BAT 8.0 system (5 modules) 3 of 16 identical Swap Change batteries

Deye BOS-G40 Pro vs Sigenergy SigenStor BAT 8.0 system (5 modules)

Deye BOS-G40 Pro
BOS-G40 Pro
36.86 kWh LFP HV
Open battery page Datasheet PDF
VS
Sigenergy SigenStor BAT 8.0 system (5 modules)
SigenStor BAT 8.0 system (5 modules)
39 kWh LFP
Open battery page Datasheet PDF
The verdict

BOS-G40 Pro leads on the differences that matter

The largest is usable energy: 2.14 kWh apart. 3 of 16 comparable parameters are identical, with 17 more left out because at least one datasheet does not publish them.

See all 13 differences
How alike are they
3 of 16 comparable
parameters are identical
identical differs not published
01

What actually differs

13 of 16 parameters
Parameter BOS-G40 Pro SigenStor BAT 8.0 system (5 modules) Difference
Usable energy 36.86 kWh 39.00 kWh 2.14 kWh apart
Continuous discharge power 40.96 kW 20.00 kW 20.96 kW more power
Max system capacity 81.9 kWh 48.4 kWh 33.6 kWh more room to expand
Nominal energy 40.96 kWh 40.30 kWh 0.66 kWh apart
Continuous charge power 40.96 kW 20.00 kW 20.96 kW faster charging
Peak discharge power 51.20 kW 30.00 kW 21.20 kW more surge
Power per kWh 1.11 kW/kWh 0.51 kW/kWh 0.60 kW/kWh more power for its size
Weight 428.0 kg 383.0 kg 45.0 kg lighter
Weight per kWh 11.6 kg/kWh 9.8 kg/kWh 1.8 kg/kWh lighter
Inverter None (battery only) Built in (all-in-one) None (battery only) vs Built in (all-in-one)
Ingress protection IP20 (battery enclosure) IP66 IP20 (battery enclosure) vs IP66
Modules per stack 5-16 1-6 5-16 vs 1-6
Dimensions 1629x530x602 mm 1720x850x260 mm 1629x530x602 mm vs 1720x850x260 mm

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

02

Full specification

Parameter BOS-G40 Pro SigenStor BAT 8.0 system (5 modules) Difference
Capacity
Usable energy 36.86 kWh 39.00 kWh 2.14 kWh apart
Nominal energy 40.96 kWh 40.30 kWh 0.66 kWh apart
Depth of discharge 90 % - Not published by Sigenergy
Max system capacity 81.9 kWh 48.4 kWh +33.6 kWh for BOS-G40 Pro
Modules per stack 5-16 1-6 5-16 vs 1-6
Power
Continuous discharge power 40.96 kW 20.00 kW +20.96 kW for BOS-G40 Pro
Continuous charge power 40.96 kW 20.00 kW +20.96 kW for BOS-G40 Pro
Peak discharge power 51.20 kW 30.00 kW +21.20 kW for BOS-G40 Pro
Power per kWh 1.11 kW/kWh 0.51 kW/kWh +0.60 kW/kWh for BOS-G40 Pro
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 410 V - Not published by Sigenergy
Operating voltage 352-467.2 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) Built in (all-in-one) None (battery only) vs Built in (all-in-one)
Inverter power - - Neither datasheet publishes this
Grid connection - - Neither datasheet publishes this
Backup power - - Neither datasheet publishes this
Physical
Weight 428.0 kg 383.0 kg -45.0 kg for SigenStor BAT 8.0 system (5 modules)
Weight per kWh 11.6 kg/kWh 9.8 kg/kWh -1.8 kg/kWh for SigenStor BAT 8.0 system (5 modules)
Dimensions 1629x530x602 mm 1720x850x260 mm 1629x530x602 mm vs 1720x850x260 mm
Ingress protection IP20 (battery enclosure) IP66 IP20 (battery enclosure) 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

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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.