--- title: "Dyness Tower T21 vs Huawei LUNA2000-21-S1 - Battery Comparison | ComparePV" description: "Compare Dyness Tower T21 vs Huawei LUNA2000-21-S1 side by side: shop prices, usable energy, round-trip efficiency, power, cycle life and the full specification." source: "https://comparepv.com/compare-batteries/dyness-tower-t21/huawei-luna2000-21-s1" updated: 2026-01-11 --- # Dyness Tower T21 vs Huawei LUNA2000-21-S1 12 differences, and they point both ways The largest is usable energy: 0.61 kWh apart. 3 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 | [Dyness Tower T21](https://comparepv.com/battery/dyness-tower-t21) | [Huawei LUNA2000-21-S1](https://comparepv.com/battery/huawei-luna2000-21-s1) | | Manufacturer | Dyness | Huawei | | Usable energy | 21.31 kWh | 20.7 kWh | | Cells and voltage | HV | LFP HV | ## Price offers | Shop | Country | Tower T21 | LUNA2000-21-S1 | | --- | --- | --- | --- | | Sklep Soltech | Poland | | 31 129.55 zł | | www.pvundsolar.at | Austria | | 9 049.20 € | | www.solar-outlet.nl | Netherlands | | 8 658.95 € | [See 20 Dyness offers](https://comparepv.com/offers?manufacturer=dyness&product_type=battery) [See 69 Huawei offers](https://comparepv.com/offers?manufacturer=huawei&product_type=battery) ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | Tower T21 | LUNA2000-21-S1 | Difference | | --- | --- | --- | --- | | Usable energy | 21.31 kWh | 20.70 kWh | 0.61 kWh apart | | Continuous discharge power | 12.78 kW | 10.50 kW | +2.28 kW for Tower T21 | | Nominal energy | 21.31 kWh | 20.70 kWh | 0.61 kWh apart | | Continuous charge power | 12.78 kW | 10.50 kW | +2.28 kW for Tower T21 | | Weight | 269.0 kg | 216.0 kg | -53.0 kg for LUNA2000-21-S1 | | Weight per kWh | 12.6 kg/kWh | 10.4 kg/kWh | -2.2 kg/kWh for LUNA2000-21-S1 | | Min operating temperature | -10 °C | -20 °C | -10 °C for LUNA2000-21-S1 | | Max operating temperature | 50 °C | 55 °C | +5 °C for LUNA2000-21-S1 | | Power per kWh | 0.60 kW/kWh | 0.51 kW/kWh | +0.09 kW/kWh for Tower T21 | | Ingress protection | IP54 | IP66 | IP54 vs IP66 | | Modules per stack | 2-6 | 1-3 | 2-6 vs 1-3 | | Dimensions | 1500x504x380 mm | 1230x590x255 mm | 1500x504x380 mm vs 1230x590x255 mm | ## Every compared parameter | Parameter | Tower T21 | LUNA2000-21-S1 | | --- | --- | --- | | Usable energy | 21.31 kWh | 20.70 kWh | | Nominal energy | 21.31 kWh | 20.70 kWh | | Depth of discharge | 100 % | 100 % | | Max system capacity | - | 20.7 kWh | | Modules per stack | 2-6 | 1-3 | | Continuous discharge power | 12.78 kW | 10.50 kW | | Continuous charge power | 12.78 kW | 10.50 kW | | Peak discharge power | - | - | | Power per kWh | 0.60 kW/kWh | 0.51 kW/kWh | | Round-trip efficiency | - | - | | Cycle life | 6000 cycles | - | | Cycle test depth | - | 100 % | | Capacity at end of life | - | - | | Self-discharge | - | - | | Voltage class | High voltage | High voltage | | Nominal voltage | 576 V | - | | Operating voltage | - | 350-980 V | | Cell chemistry | - | LFP | | Active cell balancing | - | - | | Thermal management | - | - | | Inverter | None (battery only) | None (battery only) | | Inverter power | - | - | | Grid connection | - | - | | Backup power | - | - | | Weight | 269.0 kg | 216.0 kg | | Weight per kWh | 12.6 kg/kWh | 10.4 kg/kWh | | Dimensions | 1500x504x380 mm | 1230x590x255 mm | | Ingress protection | IP54 | 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 - [Dyness Tower T21 vs Dyness Tower Pro TP23](https://comparepv.com/compare-batteries/dyness-tower-t21/dyness-tower-pro-tp23) - 14 differences, the largest is usable energy - [Dyness Tower T21 vs BYD Battery-Box Premium HVM 22.1](https://comparepv.com/compare-batteries/dyness-tower-t21/byd-battery-box-premium-hvm-22-1) - 4 differences, the largest is usable energy - [Dyness Tower T21 vs Deye GB-L24](https://comparepv.com/compare-batteries/dyness-tower-t21/gb-l24) - 10 differences, the largest is usable energy - [Huawei LUNA2000-21-S1 vs BYD Battery-Box Premium HVM 19.3](https://comparepv.com/compare-batteries/huawei-luna2000-21-s1/byd-battery-box-premium-hvm-19-3) - 7 differences, the largest is usable energy --- Source: https://comparepv.com/compare-batteries/dyness-tower-t21/huawei-luna2000-21-s1 Not in this file, on the page: a written summary generated on request.