BYD Battery-Box Premium HVS 10.2 vs SMA Home Storage 6.5
Technical comparison · High voltage
The inverter decides here: the BYD works with sixteen brands on its official list, the SMA only with the two Smart Energy hybrid inverters of its own range. If the inverter is already installed, the choice is often made for you. Warranty and guaranteed energy are manufacturer-declared values.
| Parameter | ||
|---|---|---|
| In brief | ||
| Usable capacity | 10.24 kWh | 6.56 kWh |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Weight | 167 kg | 76 kg |
| Dimensions (W×D×H) | 58.5 × 29.8 × 122.8 cm | 61 × 21.46 × 96.9 cm |
| How long it lasts | ||
| Battery life cycles | 3010 cicli | 730 cicli |
| The limit that runs out first | energia garantita | anni di garanzia |
| Rated cycles | 3650 cicli | 8000 cicli |
| Capacity at end of cycle life | — | 60 % |
| Warranty | 10 anni | 2 anni |
| Guaranteed throughput | 30.82 MWh | 47.232 MWh |
| Guaranteed remaining capacity | 60 % | 60 % |
| The numbers | ||
| Energy density | 61.3 Wh/kg | 86.3 Wh/kg |
| Identity | ||
| Use tier | F4 — House-sized (8–20 kWh) | F3 — Flat-sized (3–8 kWh) |
| Category specs | ||
| Depth of discharge | 100 % | 100 % |
| Expandable | Yes | Yes |
| Maximum expanded capacity | 38.4 kWh | 16.4 kWh |
| Battery voltage | 409.6 V | 192 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. | Compatibile con entrambi gli inverter ibridi della gamma Smart Energy di SMA: il monofase Sunny Boy Smart Energy (da 1 a 4 moduli) e il trifase Sunny Tripower Smart Energy (da 2 a 5 moduli). È la prima taglia della gamma che può scegliere fra i due. Non retrofittabile sui vecchi Sunny Boy Storage (SBS2.5-1VL-10, SBS3.7-10-SBS6.0-10) né con inverter di altri marchi. |
| Round-trip efficiency | 96 % | 94.5 % |
| Standby consumption | — | 4 W |
| SPI index (HTW Berlin) | — | 92.8 % |
| HTW test power class | — | 5 kW class |
| HTW test edition | — | Stromspeicher-Inspektion 2026 |
| Ingress protection | IP55 | IP65 |
| Mounting | Floor standing | Wall mounted |
| Minimum temperature | -10 °C | -10 °C |
| Maximum temperature | 50 °C | 50 °C |
| Works without internet | Fully | — |
| Local control | Local network | — |
| Open protocols | CAN bus | — |
| Remote updates | Can be disabled | Can be disabled |
| App required for setup | Yes | — |
| Declared standards | CE, UN 38.3, IEC 62619, VDE 2510-50 | CE, UN 38.3, IEC 62619, IEC 62477, VDE 2510-50 |
The differences that matter
- Inverters: sixteen brands vs the two SMA Smart Energy hybrids → if you already own an inverter, the choice is often settled.
- Warranty: 10 years vs 2; guaranteed energy: 30.82 vs 47.232 MWh → the SMA declares more energy overall, but the BYD stays covered for much longer.
- Installation: 167 kg floor-standing vs 76 kg wall-mounted → it changes where in the house it fits.
- Usable capacity: 10.24 vs 6.56 kWh, up to 38.4 vs 16.4 kWh expanded → how much room you have to grow.
Which one to choose
Choose BYD Battery-Box Premium HVS 10.2 if…
you already have an inverter from another brand (the official list includes Fronius, SMA, Kostal, Sungrow, Deye and others), or you want to start at 10.24 kWh usable and grow to 38.4 kWh. You accept 167 kg standing on the floor and IP55; the declared warranty is 10 years.
Choose SMA Home Storage 6.5 if…
you have picked an SMA Smart Energy hybrid inverter, single- or three-phase, and want a 6.56 kWh store that hangs on the wall, 76 kg, IP65, expandable to 16.4 kWh. It does not pair with other brands' inverters or with the older Sunny Boy Storage, and the declared warranty is 2 years.
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.