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AI-W5.1-B (5 modules) vs BOS-G25 11 of 20 identical Swap Change batteries

Deye AI-W5.1-B (5 modules) vs Deye BOS-G25

AI-W5.1-B (5 modules)
23 kWh LFP LV
Open battery page Datasheet PDF
VS
Deye BOS-G25
BOS-G25
23.04 kWh LFP HV
Open battery page Datasheet PDF
The verdict

9 differences, and they point both ways

The largest is max system capacity: 30.7 kWh more room to expand. 11 of 20 comparable parameters are identical, with 13 more left out because at least one datasheet does not publish them.

See all 9 differences
How alike are they
11 of 20 comparable
parameters are identical
identical differs not published
01

What actually differs

9 of 20 parameters
Parameter AI-W5.1-B (5 modules) BOS-G25 Difference
Max system capacity 30.7 kWh 61.4 kWh 30.7 kWh more room to expand
Nominal voltage 51 V 256 V 205 V apart
Weight 286.5 kg 420.0 kg 133.5 kg lighter
Weight per kWh 12.5 kg/kWh 18.2 kg/kWh 5.8 kg/kWh lighter
Voltage class Low voltage High voltage Low voltage vs High voltage
Ingress protection IP65 (after stacking) IP20 IP65 (after stacking) vs IP20
Modules per stack 1-6 3-12 1-6 vs 3-12
Operating voltage 43.2-57.6 V 208-292 V 43.2-57.6 V vs 208-292 V
Dimensions 1693x720x255 mm 1629x530x602 mm 1693x720x255 mm vs 1629x530x602 mm

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02

Full specification

Parameter AI-W5.1-B (5 modules) BOS-G25 Difference
Capacity
Usable energy 23.00 kWh 23.04 kWh Effectively the same
Nominal energy 25.60 kWh 25.60 kWh Same
Depth of discharge 90 % 90 % Same
Max system capacity 30.7 kWh 61.4 kWh +30.7 kWh for BOS-G25
Modules per stack 1-6 3-12 1-6 vs 3-12
Power
Continuous discharge power 12.80 kW - Not published by Deye
Continuous charge power 12.80 kW - Not published by Deye
Peak discharge power 18.43 kW - Not published by Deye
Power per kWh 0.56 kW/kWh - Not published by Deye
Efficiency and lifetime
Round-trip efficiency - - Neither datasheet publishes this
Cycle life 6000 cycles 6000 cycles Same
Cycle test depth 90 % 90 % Same
Capacity at end of life 70 % 70 % Same
Self-discharge - - Neither datasheet publishes this
Electrical
Voltage class Low voltage High voltage Low voltage vs High voltage
Nominal voltage 51 V 256 V 205 V apart
Operating voltage 43.2-57.6 V 208-292 V 43.2-57.6 V vs 208-292 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 286.5 kg 420.0 kg -133.5 kg for AI-W5.1-B (5 modules)
Weight per kWh 12.5 kg/kWh 18.2 kg/kWh -5.8 kg/kWh for AI-W5.1-B (5 modules)
Dimensions 1693x720x255 mm 1629x530x602 mm 1693x720x255 mm vs 1629x530x602 mm
Ingress protection IP65 (after stacking) IP20 IP65 (after stacking) 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 10 yrs Same
Warranted throughput 16.0 MWh - Not published by Deye
03

More useful comparisons

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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.