---
title: "BYD Battery-Box Premium HVM 22.1 vs FoxESS ECS4300H-H6 - Battery Comparison | ComparePV"
description: "Compare BYD Battery-Box Premium HVM 22.1 vs FoxESS ECS4300H-H6 side by side: shop prices, usable energy, round-trip efficiency, power, cycle life and the full specification."
source: "https://comparepv.com/compare-batteries/byd-battery-box-premium-hvm-22-1/fox-ess-ecs4300h-h6"
updated: 2026-01-11
---

# BYD Battery-Box Premium HVM 22.1 vs FoxESS ECS4300H-H6

Battery-Box Premium HVM 22.1 leads on the differences that matter

The largest is usable energy: 0.31 kWh apart. 3 of 12 comparable parameters are identical, with 21 more left out because at least one datasheet does not publish them.


## The two batteries


| Attribute | A | B |
| --- | --- | --- |
| Battery | [BYD Battery-Box Premium HVM 22.1](https://comparepv.com/battery/byd-battery-box-premium-hvm-22-1) | [FoxESS ECS4300H-H6](https://comparepv.com/battery/fox-ess-ecs4300h-h6) |
| Manufacturer | BYD | FoxESS |
| Usable energy | 22.08 kWh | 22.39 kWh |
| Cells and voltage | LFP HV | LFP HV |


## Price offers


| Shop | Country | Battery-Box Premium HVM 22.1 | ECS4300H-H6 |
| --- | --- | --- | --- |
| www.solar-outlet.nl | Netherlands | 8 177.95 € |  |

[See 121 BYD offers](https://comparepv.com/offers?manufacturer=byd&product_type=battery)

[See 21 FoxESS offers](https://comparepv.com/offers?manufacturer=foxess&product_type=battery)


## Where they differ

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


| Parameter | Battery-Box Premium HVM 22.1 | ECS4300H-H6 | Difference |
| --- | --- | --- | --- |
| Usable energy | 22.08 kWh | 22.39 kWh | 0.31 kWh apart |
| Max system capacity | 66.2 kWh | 29.0 kWh | +37.3 kWh for Battery-Box Premium HVM 22.1 |
| Round-trip efficiency | 96.0 % | 95.0 % | +1.0 pp for Battery-Box Premium HVM 22.1 |
| Nominal voltage | 410 V | 346 V | 64 V apart |
| Min operating temperature | -10 °C | -20 °C | -10 °C for ECS4300H-H6 |
| Max operating temperature | 50 °C | 55 °C | +5 °C for ECS4300H-H6 |
| Ingress protection | IP55 | IP65 | IP55 vs IP65 |
| Operating voltage | 320-472 V | 291.6-394.2 V | 320-472 V vs 291.6-394.2 V |
| Dimensions | 2160x585x298 mm | 878x570x380 mm | 2160x585x298 mm vs 878x570x380 mm |


## Every compared parameter


| Parameter | Battery-Box Premium HVM 22.1 | ECS4300H-H6 |
| --- | --- | --- |
| Usable energy | 22.08 kWh | 22.39 kWh |
| Nominal energy | - | 24.88 kWh |
| Depth of discharge | - | 90 % |
| Max system capacity | 66.2 kWh | 29.0 kWh |
| Modules per stack | - | 2-7 |
| Continuous discharge power | - | - |
| Continuous charge power | - | - |
| Peak discharge power | - | - |
| Power per kWh | - | - |
| Round-trip efficiency | 96.0 % | 95.0 % |
| Cycle life | - | 6000 cycles |
| Cycle test depth | - | 90 % |
| Capacity at end of life | - | - |
| Self-discharge | - | - |
| Voltage class | High voltage | High voltage |
| Nominal voltage | 410 V | 346 V |
| Operating voltage | 320-472 V | 291.6-394.2 V |
| Cell chemistry | LFP | LFP |
| Active cell balancing | - | - |
| Thermal management | - | - |
| Inverter | None (battery only) | None (battery only) |
| Inverter power | - | - |
| Grid connection | - | - |
| Backup power | - | - |
| Weight | - | 226.5 kg |
| Weight per kWh | - | 10.1 kg/kWh |
| Dimensions | 2160x585x298 mm | 878x570x380 mm |
| Ingress protection | IP55 | IP65 |
| Outdoor-rated | - | Yes |
| Min operating temperature | -10 °C | -20 °C |
| Max operating temperature | 50 °C | 55 °C |
| Warranty | 10 yrs | - |
| Warranted throughput | - | - |


## Related comparisons

- [BYD Battery-Box Premium HVM 22.1 vs Deye GB-L24](https://comparepv.com/compare-batteries/byd-battery-box-premium-hvm-22-1/gb-l24) - 7 differences, the largest is max system capacity
- [BYD Battery-Box Premium HVM 22.1 vs Deye GB-SL-EU (6 modules in series)](https://comparepv.com/compare-batteries/byd-battery-box-premium-hvm-22-1/gb-sl-eu-6-modules-in-series) - 8 differences, the largest is max system capacity
- [BYD Battery-Box Premium HVM 22.1 vs Deye GB-L (6 modules in series)](https://comparepv.com/compare-batteries/byd-battery-box-premium-hvm-22-1/ningbo-deye-ess-technology-co-ltd-gb-l-6-modules-in-series) - 7 differences, the largest is max system capacity
- [FoxESS ECS4300H-H6 vs Pylontech Force H1 (FH48074)](https://comparepv.com/compare-batteries/fox-ess-ecs4300h-h6/pylontech-force-h1-fh48074) - 8 differences, the largest is nominal voltage


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Source: https://comparepv.com/compare-batteries/byd-battery-box-premium-hvm-22-1/fox-ess-ecs4300h-h6

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