BYD Battery-Box Premium HVM 8.3 vs Huawei LUNA2000-21-S1
Technical comparison · High voltage
The sizes are far apart here: 8.28 against 20.7 kWh usable. The Huawei LUNA2000-21-S1 also brings the inverter constraint, since it must be a Huawei, while BYD lists sixteen brands.
| Parameter | ||
|---|---|---|
| In brief | ||
| Usable capacity | 8.28 kWh | 20.7 kWh |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | — | 386.47 €/kWh |
| List price | — | 8000 € |
| Weight | — | 216 kg |
| Dimensions (W×D×H) | 58.5 × 29.8 × 99.5 cm | 59 × 25.5 × 123 cm |
| How long it lasts | ||
| Battery life cycles | 3094 cicli | 1393 cicli |
| The limit that runs out first | energia garantita | energia garantita |
| Rated cycles | 3650 cicli | 5000 cicli |
| Capacity at end of cycle life | — | 80 % |
| Warranty | 10 anni | 5 anni |
| Guaranteed throughput | 25.62 MWh | 28.84 MWh |
| Guaranteed remaining capacity | 60 % | 60 % |
| The numbers | ||
| Cost of stored energy | — | 0.277 €/kWh |
| Energy density | — | 95.8 Wh/kg |
| Identity | ||
| Use tier | F4 — House-sized (8–20 kWh) | F5 — Large-house-sized (over 20 kWh) |
| Price | ||
| Price | — | ~5000–11000 € |
| Category specs | ||
| Depth of discharge | 100 % | 100 % |
| Expandable | Yes | Yes |
| Battery voltage | 153.6 V | — |
| Declared compatible inverters | Sedici marchi nell'elenco ufficiale: Fronius, GoodWe, Viessmann, KOSTAL, SMA, Sungrow, GE, KACO, KACO NH, Ingeteam, Solis, Canadian Solar, Deye, Solplanet, Western CO, Sosen. Per ciascun modello l'elenco dà il numero di moduli ammessi e la versione minima del firmware. | Solo inverter Huawei — SUN2000-2/3/3.68/4/4.6/5/6KTL-L1, SUN2000-3/3.68/4/4.6/5/6K-LB0, SUN2000-8/10K-LC0, SUN2000-3/4/5/6/8/10KTL-M1, SUN2000-5/6/8/10/12K-MAP0, SUN2000-12/15/17/20/25K-MB0, SUN5000-3/6K-LB0, SUN5000-8/12K-MAP0, SUN5000-17/25K-MB0 |
| Maximum charge power | — | 10.5 kW |
| Grid charging | — | Yes |
| Round-trip efficiency | 96 % | — |
| Ingress protection | IP55 | IP66 |
| Mounting | Floor standing | Floor standing |
| Minimum temperature | -10 °C | -20 °C |
| Maximum temperature | 50 °C | 55 °C |
| Noise level | — | 29 dB |
| Works without internet | Fully | With limitations |
| Local control | Local network | — |
| Open protocols | CAN bus | — |
| App required for setup | Yes | Yes |
| Declared standards | CE, UN 38.3, IEC 62619, VDE 2510-50 | CE, UN 38.3, IEC 62619 |
The differences that matter
- Inverters: sixteen brands in the official list vs Huawei inverters only → with an inverter from another maker the LUNA2000 is ruled out.
- Usable capacity: 8.28 vs 20.7 kWh → over 12 kWh more to carry into the evening.
- Guaranteed energy: 25.62 vs 28.84 MWh, which looks close → Huawei spreads it over 20.7 kWh, so the cap is reached after about 1393 cycles, under four years at one a day; BYD's after about 3094 cycles, around eight and a half years.
- Operating conditions: IP66 and −20 to 55 °C vs IP55 and −10 to 50 °C; without internet Huawei works in a reduced mode, BYD fully → the LUNA2000 suits harsher spots, the BYD a house with an unreliable connection. Figures as declared by the manufacturers.
Which one to choose
Choose BYD Battery-Box Premium HVM 8.3 if…
A house with a non-Huawei inverter that moves around 8 kWh and wants that energy guaranteed for ten years. It works fully without internet and can be read over the local network. You accept far less capacity: a little over 8 kWh against more than 20.
Choose Huawei LUNA2000-21-S1 if…
A house with a Huawei inverter that has to move around 20 kWh from day to evening, charging also from the grid at up to 10.5 kW and operating from −20 to 55 °C. You accept that the guaranteed energy runs out early: at one cycle a day, 28.84 MWh is used up in about 1393 days, before the 5-year warranty ends, and without internet it works in a reduced mode.
Where to buy
The purchase links are the same as on the two product pages and don't influence the verdict. The product pages have the complete data.