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

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

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

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02

Full specification

Parameter BOS-G25 AI-W5.1-B (5 modules) Difference
Capacity
Usable energy 23.04 kWh 23.00 kWh Effectively the same
Nominal energy 25.60 kWh 25.60 kWh Same
Depth of discharge 90 % 90 % Same
Max system capacity 61.4 kWh 30.7 kWh +30.7 kWh for BOS-G25
Modules per stack 3-12 1-6 3-12 vs 1-6
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 High voltage Low voltage High voltage vs Low voltage
Nominal voltage 256 V 51 V 205 V apart
Operating voltage 208-292 V 43.2-57.6 V 208-292 V vs 43.2-57.6 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 420.0 kg 286.5 kg -133.5 kg for AI-W5.1-B (5 modules)
Weight per kWh 18.2 kg/kWh 12.5 kg/kWh -5.8 kg/kWh for AI-W5.1-B (5 modules)
Dimensions 1629x530x602 mm 1693x720x255 mm 1629x530x602 mm vs 1693x720x255 mm
Ingress protection IP20 IP65 (after stacking) IP20 vs IP65 (after stacking)
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

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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.