--- title: "Deye BOS-A (7 modules in series) vs Sigenergy SigenStor BAT stack (6 modules) - Battery Comparison | ComparePV" description: "Compare Deye BOS-A (7 modules in series) vs Sigenergy SigenStor BAT stack (6 modules) side by side: usable energy, round-trip efficiency, power, cycle life and the full specification." source: "https://comparepv.com/compare-batteries/bos-a-7-modules-in-series/sigenergy-sigenstor-bat-stack-6-modules" updated: 2026-01-11 --- # Deye BOS-A (7 modules in series) vs Sigenergy SigenStor BAT stack (6 modules) 7 differences, and they point both ways The largest is max system capacity: 128.3 kWh more room to expand. 5 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 | [Deye BOS-A (7 modules in series)](https://comparepv.com/battery/bos-a-7-modules-in-series) | [Sigenergy SigenStor BAT stack (6 modules)](https://comparepv.com/battery/sigenergy-sigenstor-bat-stack-6-modules) | | Manufacturer | Deye | Sigenergy | | Usable energy | 48.38 kWh | 48.36 kWh | | Cells and voltage | LFP HV | LFP | [See 44 Deye offers](https://comparepv.com/offers?manufacturer=deye&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 | BOS-A (7 modules in series) | SigenStor BAT stack (6 modules) | Difference | | --- | --- | --- | --- | | Max system capacity | 176.6 kWh | 48.4 kWh | +128.3 kWh for BOS-A (7 modules in series) | | Nominal energy | 53.76 kWh | 48.36 kWh | 5.40 kWh apart | | Weight | 538.0 kg | 456.0 kg | -82.0 kg for SigenStor BAT stack (6 modules) | | Weight per kWh | 11.1 kg/kWh | 9.4 kg/kWh | -1.7 kg/kWh for SigenStor BAT stack (6 modules) | | Ingress protection | IP20 | IP66 | IP20 vs IP66 | | Modules per stack | 7-23 | 1-6 | 7-23 vs 1-6 | | Dimensions | 1351x629x605 mm | 1990x850x260 mm | 1351x629x605 mm vs 1990x850x260 mm | ## Every compared parameter | Parameter | BOS-A (7 modules in series) | SigenStor BAT stack (6 modules) | | --- | --- | --- | | Usable energy | 48.38 kWh | 48.36 kWh | | Nominal energy | 53.76 kWh | 48.36 kWh | | Depth of discharge | 90 % | - | | Max system capacity | 176.6 kWh | 48.4 kWh | | Modules per stack | 7-23 | 1-6 | | Continuous discharge power | - | 24.00 kW | | Continuous charge power | - | 24.00 kW | | Peak discharge power | - | 36.00 kW | | Power per kWh | - | 0.50 kW/kWh | | Round-trip efficiency | - | - | | Cycle life | 6000 cycles | - | | Cycle test depth | 90 % | - | | Capacity at end of life | 70 % | - | | Self-discharge | - | - | | Voltage class | High voltage | - | | Nominal voltage | 269 V | - | | Operating voltage | 235.2-302.4 V | - | | Cell chemistry | LFP | LFP | | Active cell balancing | - | - | | Thermal management | - | - | | Inverter | None (battery only) | None (battery only) | | Inverter power | - | - | | Grid connection | - | - | | Backup power | - | - | | Weight | 538.0 kg | 456.0 kg | | Weight per kWh | 11.1 kg/kWh | 9.4 kg/kWh | | Dimensions | 1351x629x605 mm | 1990x850x260 mm | | Ingress protection | IP20 | IP66 | | Outdoor-rated | - | - | | Min operating temperature | -20 °C | -20 °C | | Max operating temperature | 55 °C | 55 °C | | Warranty | 10 yrs | - | | Warranted throughput | - | - | ## Related comparisons - [Deye BOS-A (7 modules in series) vs Deye BOS-G50](https://comparepv.com/compare-batteries/bos-a-7-modules-in-series/bos-g50) - 9 differences, the largest is usable energy - [Deye BOS-A (7 modules in series) vs Deye BOS-G55](https://comparepv.com/compare-batteries/bos-a-7-modules-in-series/bos-g55) - 9 differences, the largest is usable energy - [Deye BOS-A (7 modules in series) vs Deye BOS-G45](https://comparepv.com/compare-batteries/bos-a-7-modules-in-series/bos-g45) - 9 differences, the largest is usable energy - [Sigenergy SigenStor BAT stack (6 modules) vs Sigenergy SigenStor BAT 8.0 system (6 modules)](https://comparepv.com/compare-batteries/sigenergy-sigenstor-bat-stack-6-modules/sigenergy-sigenstor-bat-8-0-system-6-modules) - 3 differences, the largest is usable energy - [Sigenergy SigenStor BAT stack (6 modules) vs Sigenergy SigenStor BAT stack (5 modules)](https://comparepv.com/compare-batteries/sigenergy-sigenstor-bat-stack-6-modules/sigenergy-sigenstor-bat-stack-5-modules) - 7 differences, the largest is usable energy - [Sigenergy SigenStor BAT stack (6 modules) vs Sigenergy SigenStor BAT 8.0 system (5 modules)](https://comparepv.com/compare-batteries/sigenergy-sigenstor-bat-stack-6-modules/sigenergy-sigenstor-bat-8-0-system-5-modules) - 9 differences, the largest is usable energy --- Source: https://comparepv.com/compare-batteries/bos-a-7-modules-in-series/sigenergy-sigenstor-bat-stack-6-modules Not in this file, on the page: a written summary generated on request.