--- title: "BYD Battery-Box Premium HVS 7.7 vs Sigenergy SigenStor BAT 8.0 - Battery Comparison | ComparePV" description: "Compare BYD Battery-Box Premium HVS 7.7 vs Sigenergy SigenStor BAT 8.0 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-hvs-7-7/sigenergy-sigenstor-bat-8-0" updated: 2026-01-11 --- # BYD Battery-Box Premium HVS 7.7 vs Sigenergy SigenStor BAT 8.0 16 differences, and they point both ways The largest is continuous discharge power: 3.68 kW more power. 3 of 19 comparable parameters are identical, with 14 more left out because at least one datasheet does not publish them. ## The two batteries | Attribute | A | B | | --- | --- | --- | | Battery | [BYD Battery-Box Premium HVS 7.7](https://comparepv.com/battery/byd-battery-box-premium-hvs-7-7) | [Sigenergy SigenStor BAT 8.0](https://comparepv.com/battery/sigenergy-sigenstor-bat-8-0) | | Manufacturer | BYD | Sigenergy | | Usable energy | 7.68 kWh | 7.8 kWh | | Cells and voltage | LFP HV | LFP HV | ## Price offers | Shop | Country | Battery-Box Premium HVS 7.7 | SigenStor BAT 8.0 | | --- | --- | --- | --- | | Solaris Energy | Poland | 13 720 zł | | | solarbatterysupermarket.com.au | Australia | | 3 895 A$ | | Consor Energia | Poland | 31 000 zł | | | www.solar-outlet.nl | Netherlands | 3 298.95 € | | [See 119 BYD offers](https://comparepv.com/offers?manufacturer=byd&product_type=battery) [See 11 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 | Battery-Box Premium HVS 7.7 | SigenStor BAT 8.0 | Difference | | --- | --- | --- | --- | | Continuous discharge power | 7.68 kW | 4.00 kW | +3.68 kW for Battery-Box Premium HVS 7.7 | | Usable energy | 7.68 kWh | 7.80 kWh | 0.12 kWh apart | | Max system capacity | 12.8 kWh | 48.4 kWh | +35.6 kWh for SigenStor BAT 8.0 | | Nominal energy | 7.68 kWh | 8.06 kWh | 0.38 kWh apart | | Continuous charge power | 7.68 kW | 4.00 kW | +3.68 kW for Battery-Box Premium HVS 7.7 | | Peak discharge power | 15.36 kW | 6.00 kW | +9.36 kW for Battery-Box Premium HVS 7.7 | | Power per kWh | 1.00 kW/kWh | 0.51 kW/kWh | +0.49 kW/kWh for Battery-Box Premium HVS 7.7 | | Weight | 129.0 kg | 73.0 kg | -56.0 kg for SigenStor BAT 8.0 | | Weight per kWh | 16.8 kg/kWh | 9.4 kg/kWh | -7.4 kg/kWh for SigenStor BAT 8.0 | | Min operating temperature | -10 °C | -20 °C | -10 °C for SigenStor BAT 8.0 | | Max operating temperature | 50 °C | 55 °C | +5 °C for SigenStor BAT 8.0 | | Inverter | None (battery only) | Built in (all-in-one) | None (battery only) vs Built in (all-in-one) | | Ingress protection | IP55 | IP66 | IP55 vs IP66 | | Modules per stack | 2-5 | 1-6 | 2-5 vs 1-6 | | Operating voltage | 240-360 V | 300-600 V | 240-360 V vs 300-600 V | | Dimensions | 995x585x298 mm | 270x767x260 mm | 995x585x298 mm vs 270x767x260 mm | ## Every compared parameter | Parameter | Battery-Box Premium HVS 7.7 | SigenStor BAT 8.0 | | --- | --- | --- | | Usable energy | 7.68 kWh | 7.80 kWh | | Nominal energy | 7.68 kWh | 8.06 kWh | | Depth of discharge | 100 % | - | | Max system capacity | 12.8 kWh | 48.4 kWh | | Modules per stack | 2-5 | 1-6 | | Continuous discharge power | 7.68 kW | 4.00 kW | | Continuous charge power | 7.68 kW | 4.00 kW | | Peak discharge power | 15.36 kW | 6.00 kW | | Power per kWh | 1.00 kW/kWh | 0.51 kW/kWh | | Round-trip efficiency | 96.0 % | - | | Cycle life | - | - | | Cycle test depth | 100 % | 100 % | | Capacity at end of life | - | - | | Self-discharge | - | - | | Voltage class | High voltage | High voltage | | Nominal voltage | 307 V | - | | Operating voltage | 240-360 V | 300-600 V | | Cell chemistry | LFP | LFP | | Active cell balancing | - | - | | Thermal management | - | - | | Inverter | None (battery only) | Built in (all-in-one) | | Inverter power | - | - | | Grid connection | - | - | | Backup power | - | - | | Weight | 129.0 kg | 73.0 kg | | Weight per kWh | 16.8 kg/kWh | 9.4 kg/kWh | | Dimensions | 995x585x298 mm | 270x767x260 mm | | Ingress protection | IP55 | IP66 | | 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 HVS 7.7 vs FoxESS ECS2900-H3](https://comparepv.com/compare-batteries/byd-battery-box-premium-hvs-7-7/fox-ess-ecs2900-h3) - 15 differences, the largest is max system capacity - [BYD Battery-Box Premium HVS 7.7 vs FoxESS ECS4300H-H2](https://comparepv.com/compare-batteries/byd-battery-box-premium-hvs-7-7/fox-ess-ecs4300h-h2) - 15 differences, the largest is usable energy - [BYD Battery-Box Premium HVS 7.7 vs Deye GB-L8](https://comparepv.com/compare-batteries/byd-battery-box-premium-hvs-7-7/gb-l8) - 17 differences, the largest is usable energy --- Source: https://comparepv.com/compare-batteries/byd-battery-box-premium-hvs-7-7/sigenergy-sigenstor-bat-8-0 Not in this file, on the page: a written summary generated on request.