--- title: "BYD Battery-Box Premium HVS 7.7 vs Deye GB-L8 - Battery Comparison | ComparePV" description: "Compare BYD Battery-Box Premium HVS 7.7 vs Deye GB-L8 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/gb-l8" updated: 2026-01-11 --- # BYD Battery-Box Premium HVS 7.7 vs Deye GB-L8 GB-L8 leads on the differences that matter The largest is usable energy: 0.32 kWh apart. 5 of 22 comparable parameters are identical, with 11 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) | [Deye GB-L8](https://comparepv.com/battery/gb-l8) | | Manufacturer | BYD | Deye | | Usable energy | 7.68 kWh | 7.36 kWh | | Cells and voltage | LFP HV | LFP HV | ## Price offers | Shop | Country | Battery-Box Premium HVS 7.7 | GB-L8 | | --- | --- | --- | --- | | Solaris Energy | Poland | 13 720 zł | | | Consor Energia | Poland | 31 000 zł | | | www.solar-outlet.nl | Netherlands | 3 298.95 € | | [See 113 BYD offers](https://comparepv.com/offers?manufacturer=byd&product_type=battery) [See 38 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 | Battery-Box Premium HVS 7.7 | GB-L8 | Difference | | --- | --- | --- | --- | | Usable energy | 7.68 kWh | 7.36 kWh | 0.32 kWh apart | | Continuous discharge power | 7.68 kW | 8.19 kW | +0.51 kW for GB-L8 | | Max system capacity | 12.8 kWh | 24.5 kWh | +11.7 kWh for GB-L8 | | Nominal energy | 7.68 kWh | 8.18 kWh | 0.50 kWh apart | | Depth of discharge | 100 % | 90 % | +10 pp for Battery-Box Premium HVS 7.7 | | Continuous charge power | 7.68 kW | 8.19 kW | +0.51 kW for GB-L8 | | Peak discharge power | 15.36 kW | 10.24 kW | +5.12 kW for Battery-Box Premium HVS 7.7 | | Nominal voltage | 307 V | 205 V | 102 V apart | | Weight | 129.0 kg | 97.0 kg | -32.0 kg for GB-L8 | | Weight per kWh | 16.8 kg/kWh | 13.2 kg/kWh | -3.6 kg/kWh for GB-L8 | | Min operating temperature | -10 °C | -20 °C | -10 °C for GB-L8 | | Power per kWh | 1.00 kW/kWh | 1.11 kW/kWh | +0.11 kW/kWh for GB-L8 | | Max operating temperature | 50 °C | 60 °C | +10 °C for GB-L8 | | Ingress protection | IP55 | IP65 | IP55 vs IP65 | | Modules per stack | 2-5 | 2-6 | 2-5 vs 2-6 | | Operating voltage | 240-360 V | 166.4-700 V | 240-360 V vs 166.4-700 V | | Dimensions | 995x585x298 mm | 650x540x385 mm | 995x585x298 mm vs 650x540x385 mm | ## Every compared parameter | Parameter | Battery-Box Premium HVS 7.7 | GB-L8 | | --- | --- | --- | | Usable energy | 7.68 kWh | 7.36 kWh | | Nominal energy | 7.68 kWh | 8.18 kWh | | Depth of discharge | 100 % | 90 % | | Max system capacity | 12.8 kWh | 24.5 kWh | | Modules per stack | 2-5 | 2-6 | | Continuous discharge power | 7.68 kW | 8.19 kW | | Continuous charge power | 7.68 kW | 8.19 kW | | Peak discharge power | 15.36 kW | 10.24 kW | | Power per kWh | 1.00 kW/kWh | 1.11 kW/kWh | | Round-trip efficiency | 96.0 % | - | | Cycle life | - | 6000 cycles | | Cycle test depth | 100 % | - | | Capacity at end of life | - | 70 % | | Self-discharge | - | - | | Voltage class | High voltage | High voltage | | Nominal voltage | 307 V | 205 V | | Operating voltage | 240-360 V | 166.4-700 V | | Cell chemistry | LFP | LFP | | Active cell balancing | - | - | | Thermal management | - | Yes | | Inverter | None (battery only) | None (battery only) | | Inverter power | - | - | | Grid connection | - | - | | Backup power | - | - | | Weight | 129.0 kg | 97.0 kg | | Weight per kWh | 16.8 kg/kWh | 13.2 kg/kWh | | Dimensions | 995x585x298 mm | 650x540x385 mm | | Ingress protection | IP55 | IP65 | | Outdoor-rated | Yes | Yes | | Min operating temperature | -10 °C | -20 °C | | Max operating temperature | 50 °C | 60 °C | | Warranty | 10 yrs | 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 Sigenergy SigenStor BAT 8.0](https://comparepv.com/compare-batteries/byd-battery-box-premium-hvs-7-7/sigenergy-sigenstor-bat-8-0) - 16 differences, the largest is continuous discharge power - [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 - [Deye GB-L8 vs Deye GB-SL-EU (2 modules in series)](https://comparepv.com/compare-batteries/gb-l8/gb-sl-eu-2-modules-in-series) - 5 differences, the largest is weight - [Deye GB-L8 vs Dyness Tower Pro TP7](https://comparepv.com/compare-batteries/gb-l8/dyness-tower-pro-tp7) - 16 differences, the largest is continuous discharge power - [Deye GB-L8 vs FoxESS HS7.5](https://comparepv.com/compare-batteries/gb-l8/foxess-hs7-5) - 9 differences, the largest is usable energy --- Source: https://comparepv.com/compare-batteries/byd-battery-box-premium-hvs-7-7/gb-l8 Not in this file, on the page: a written summary generated on request.