---
title: "FoxESS ECS2900-H2 vs Sigenergy SigenStor BAT 5.0 - Battery Comparison | ComparePV"
description: "Compare FoxESS ECS2900-H2 vs Sigenergy SigenStor BAT 5.0 side by side: shop prices, usable energy, round-trip efficiency, power, cycle life and the full specification."
source: "https://comparepv.com/compare-batteries/fox-ess-ecs2900-h2/sigenergy-sigenstor-bat-5-0"
updated: 2026-01-11
---

# FoxESS ECS2900-H2 vs Sigenergy SigenStor BAT 5.0

SigenStor BAT 5.0 leads on the differences that matter

The largest is max system capacity: 28.2 kWh more room to expand. 6 of 15 comparable parameters are identical, with 18 more left out because at least one datasheet does not publish them.


## The two batteries


| Attribute | A | B |
| --- | --- | --- |
| Battery | [FoxESS ECS2900-H2](https://comparepv.com/battery/fox-ess-ecs2900-h2) | [Sigenergy SigenStor BAT 5.0](https://comparepv.com/battery/sigenergy-sigenstor-bat-5-0) |
| Manufacturer | FoxESS | Sigenergy |
| Usable energy | 5.18 kWh | 5.2 kWh |
| Cells and voltage | LFP HV | LFP HV |


## Price offers


| Shop | Country | ECS2900-H2 | SigenStor BAT 5.0 |
| --- | --- | --- | --- |
| www.solar-outlet.nl | Netherlands |  | 2 389.95 € |

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

[See 15 Sigenergy offers](https://comparepv.com/offers?manufacturer=sigenergy&product_type=battery)


## Where they differ

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


| Parameter | ECS2900-H2 | SigenStor BAT 5.0 | Difference |
| --- | --- | --- | --- |
| Max system capacity | 20.2 kWh | 48.4 kWh | +28.2 kWh for SigenStor BAT 5.0 |
| Nominal energy | 5.76 kWh | 5.38 kWh | 0.38 kWh apart |
| Weight | 68.3 kg | 57.0 kg | -11.3 kg for SigenStor BAT 5.0 |
| Weight per kWh | 13.2 kg/kWh | 11.0 kg/kWh | -2.2 kg/kWh for SigenStor BAT 5.0 |
| Cycle test depth | 90 % | 100 % | 10 pp apart |
| Ingress protection | IP65 | IP66 | IP65 vs IP66 |
| Modules per stack | 2-7 | 1-6 | 2-7 vs 1-6 |
| Operating voltage | 97.2-131.4 V | 300-600 V | 97.2-131.4 V vs 300-600 V |
| Dimensions | 380x570x380 mm | 270x767x260 mm | 380x570x380 mm vs 270x767x260 mm |


## Every compared parameter


| Parameter | ECS2900-H2 | SigenStor BAT 5.0 |
| --- | --- | --- |
| Usable energy | 5.18 kWh | 5.20 kWh |
| Nominal energy | 5.76 kWh | 5.38 kWh |
| Depth of discharge | 90 % | - |
| Max system capacity | 20.2 kWh | 48.4 kWh |
| Modules per stack | 2-7 | 1-6 |
| Continuous discharge power | - | 2.50 kW |
| Continuous charge power | - | 2.50 kW |
| Peak discharge power | - | 3.75 kW |
| Power per kWh | - | 0.48 kW/kWh |
| Round-trip efficiency | 95.0 % | - |
| Cycle life | 6000 cycles | - |
| Cycle test depth | 90 % | 100 % |
| Capacity at end of life | - | - |
| Self-discharge | - | - |
| Voltage class | High voltage | High voltage |
| Nominal voltage | 115 V | - |
| Operating voltage | 97.2-131.4 V | 300-600 V |
| Cell chemistry | LFP | LFP |
| Active cell balancing | - | - |
| Thermal management | - | - |
| Inverter | None (battery only) | None (battery only) |
| Inverter power | - | - |
| Grid connection | - | - |
| Backup power | - | - |
| Weight | 68.3 kg | 57.0 kg |
| Weight per kWh | 13.2 kg/kWh | 11.0 kg/kWh |
| Dimensions | 380x570x380 mm | 270x767x260 mm |
| Ingress protection | IP65 | IP66 |
| Outdoor-rated | Yes | - |
| Min operating temperature | -20 °C | -20 °C |
| Max operating temperature | 55 °C | 55 °C |
| Warranty | - | - |
| Warranted throughput | - | - |


## Related comparisons

- [FoxESS ECS2900-H2 vs BYD Battery-Box Premium HVS 5.1](https://comparepv.com/compare-batteries/fox-ess-ecs2900-h2/byd-battery-box-premium-hvs-5-1) - 15 differences, the largest is max system capacity
- [FoxESS ECS2900-H2 vs Huawei LUNA2000-5-S0](https://comparepv.com/compare-batteries/fox-ess-ecs2900-h2/huawei-luna2000-5-s0) - 11 differences, the largest is usable energy
- [FoxESS ECS2900-H2 vs GoodWe Lynx D LX D5.0-10](https://comparepv.com/compare-batteries/fox-ess-ecs2900-h2/goodwe-lynx-d-lx-d5-0-10) - 9 differences, the largest is usable energy


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Source: https://comparepv.com/compare-batteries/fox-ess-ecs2900-h2/sigenergy-sigenstor-bat-5-0

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