BYD Battery-Box Premium HVM 19.3 vs RCT Power Battery 9.6
Technical comparison · High voltage
Two high-voltage LFP home batteries, both expandable: the choice comes down to the inverter they connect to, then to capacity and the room they will sit in. Manufacturer-declared values.
| Parameter | ||
|---|---|---|
| In brief | ||
| Usable capacity | 19.32 kWh | 8.64 kWh |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Weight | — | 126 kg |
| Dimensions (W×D×H) | 58.5 × 29.8 × 192.7 cm | 34 × 34 × 129 cm |
| How long it lasts | ||
| Battery life cycles | 3094 cicli | 3650 cicli |
| The limit that runs out first | energia garantita | anni di garanzia |
| Rated cycles | 3650 cicli | — |
| Warranty | 10 anni | 10 anni |
| Guaranteed throughput | 59.77 MWh | — |
| Guaranteed remaining capacity | 60 % | 80 % |
| The numbers | ||
| Energy density | — | 68.6 Wh/kg |
| Identity | ||
| Use tier | F4 — House-sized (8–20 kWh) | F4 — House-sized (8–20 kWh) |
| Category specs | ||
| Depth of discharge | 100 % | 90 % |
| Expandable | Yes | Yes |
| Maximum expanded capacity | — | 19.2 kWh |
| Battery voltage | 358.4 V | 384 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. | RCT Power Storage DC (6.0/8.0/10.0 LAN, 12.0): intervallo di tensione lato batteria 120-600 V dichiarato dall'inverter, entro cui rientra questa taglia (384 V nominali, 300-432 V di range). |
| Round-trip efficiency | 96 % | — |
| Standby consumption | — | 5 W |
| Ingress protection | IP55 | ip42 |
| Mounting | Floor standing | Floor standing |
| Minimum temperature | -10 °C | 5 °C |
| Maximum temperature | 50 °C | 40 °C |
| Works without internet | Fully | — |
| Local control | Local network | None |
| Open protocols | CAN bus | — |
| App required for setup | Yes | — |
| Declared standards | CE, UN 38.3, IEC 62619, VDE 2510-50 | CE, UN 38.3, IEC 62619 |
The differences that matter
- Usable capacity, 19.32 vs 8.64 kWh → the first covers on its own what the second reaches only by expanding to 19.2 kWh.
- Compatible inverters → BYD publishes an official list of sixteen brands; RCT declares the RCT Power Storage DC series: with any other inverter, check before buying.
- Operating temperature, −10 to 50 vs 5 to 40 °C → in an unheated garage the RCT has less margin in winter.
- IP55 vs IP42 → BYD is more tolerant of dust and splashes, so of a less sheltered room.
Which one to choose
Choose BYD Battery-Box Premium HVM 19.3 if…
A home with high consumption, or with an inverter from one of the sixteen brands on BYD's official list (including Fronius, SMA, Sungrow and KOSTAL): 19.32 kWh usable in a single cabinet. It works fully without internet and offers local-network control. The trade-off is the 192.7 cm height to plan for in the technical room.
Choose RCT Power Battery 9.6 if…
A home with an inverter from the RCT Power Storage DC series, starting at 8.64 kWh usable and expandable to 19.2 kWh; the column is 129 cm tall. You accept IP42, an operating range of 5 to 40 °C and no local control: it needs an indoor, sheltered room.
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.