---
title: "Deye BOS-G35 vs Deye BOS-G40 - Battery Comparison | ComparePV"
description: "Compare Deye BOS-G35 vs Deye BOS-G40 side by side: usable energy, round-trip efficiency, power, cycle life and the full specification."
source: "https://comparepv.com/compare-batteries/bos-g35/bos-g40"
updated: 2026-01-10
---

# Deye BOS-G35 vs Deye BOS-G40

G40 leads on the differences that matter

The largest is usable energy: 4.61 kWh apart. 15 of 20 comparable parameters are identical, with 13 more left out because at least one datasheet does not publish them.


## The two batteries


| Attribute | A | B |
| --- | --- | --- |
| Battery | [Deye BOS-G35](https://comparepv.com/battery/bos-g35) | [Deye BOS-G40](https://comparepv.com/battery/bos-g40) |
| Manufacturer | Deye | Deye |
| Usable energy | 32.25 kWh | 36.86 kWh |
| Cells and voltage | LFP HV | LFP HV |

[See 44 Deye offers](https://comparepv.com/offers?manufacturer=deye&product_type=battery)


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | G35 | G40 | Difference |
| --- | --- | --- | --- |
| Usable energy | 32.25 kWh | 36.86 kWh | 4.61 kWh apart |
| Nominal energy | 35.84 kWh | 40.96 kWh | 5.12 kWh apart |
| Nominal voltage | 358 V | 410 V | 51 V apart |
| Weight per kWh | 13.0 kg/kWh | 11.4 kg/kWh | -1.6 kg/kWh for G40 |
| Operating voltage | 291.2-408.8 V | 332.8-467.2 V | 291.2-408.8 V vs 332.8-467.2 V |


## Every compared parameter


| Parameter | G35 | G40 |
| --- | --- | --- |
| Usable energy | 32.25 kWh | 36.86 kWh |
| Nominal energy | 35.84 kWh | 40.96 kWh |
| Depth of discharge | 90 % | 90 % |
| Max system capacity | 61.4 kWh | 61.4 kWh |
| Modules per stack | 3-12 | 3-12 |
| Continuous discharge power | - | - |
| Continuous charge power | - | - |
| Peak discharge power | - | - |
| Power per kWh | - | - |
| Round-trip efficiency | - | - |
| Cycle life | 6000 cycles | 6000 cycles |
| Cycle test depth | 90 % | 90 % |
| Capacity at end of life | 70 % | 70 % |
| Self-discharge | - | - |
| Voltage class | High voltage | High voltage |
| Nominal voltage | 358 V | 410 V |
| Operating voltage | 291.2-408.8 V | 332.8-467.2 V |
| Cell chemistry | LFP | LFP |
| Active cell balancing | - | - |
| Thermal management | - | - |
| Inverter | None (battery only) | None (battery only) |
| Inverter power | - | - |
| Grid connection | - | - |
| Backup power | - | - |
| Weight | 420.0 kg | 420.0 kg |
| Weight per kWh | 13.0 kg/kWh | 11.4 kg/kWh |
| Dimensions | 1629x530x602 mm | 1629x530x602 mm |
| Ingress protection | IP20 | IP20 |
| Outdoor-rated | - | - |
| Min operating temperature | -20 °C | -20 °C |
| Max operating temperature | 55 °C | 55 °C |
| Warranty | 10 yrs | 10 yrs |
| Warranted throughput | - | - |


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Source: https://comparepv.com/compare-batteries/bos-g35/bos-g40

Not in this file, on the page: a written summary generated on request.