BYD Battery-Box Premium HVM 19.3 vs RCT Power Battery 7.6
Technical comparison · High voltage
Two high-voltage home batteries of different sizes, and a constraint that weighs more than capacity: which inverter they work with. The BYD is in an official list of sixteen brands, while the RCT is declared for the maker's own Storage DC inverters.
| Parameter | ||
|---|---|---|
| In brief | ||
| Usable capacity | 19.32 kWh | 6.91 kWh |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Weight | — | 102 kg |
| Dimensions (W×D×H) | 58.5 × 29.8 × 192.7 cm | 34 × 34 × 106 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 | — | 67.7 Wh/kg |
| Identity | ||
| Use tier | F4 — House-sized (8–20 kWh) | F3 — Flat-sized (3–8 kWh) |
| Category specs | ||
| Depth of discharge | 100 % | 90 % |
| Expandable | Yes | Yes |
| Maximum expanded capacity | — | 15.36 kWh |
| Battery voltage | 358.4 V | 307 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 (307 V nominali, 240-346 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 kWh vs 6.91 kWh → the RCT reaches 15.36 kWh only by adding a second tower.
- Inverters: sixteen brands on the official list vs the RCT Power Storage DC series → it decides which inverter you start from.
- Capacity guaranteed at end of warranty 60% vs 80%, both over 10 years → in theory at least about 11.6 kWh vs about 5.5 kWh are left (manufacturer-declared values).
- Operating temperature −10 to 50 °C vs 5 to 40 °C, IP55 vs IP42 → the RCT needs a room that does not drop below 5 °C.
Which one to choose
Choose BYD Battery-Box Premium HVM 19.3 if…
You have a household with high consumption, or you want to pair the battery with an inverter from one of the sixteen brands on the official list (Fronius, SMA, Sungrow, KOSTAL and others), and you want a system that keeps working without internet and is controllable on the local network. The trade-off is space and handling: it is a tower almost 193 cm tall, and the app is needed for the first start-up.
Choose RCT Power Battery 7.6 if…
You already have, or are choosing, an RCT Power Storage DC inverter and a 6.91 kWh usable size is enough, with room to grow to 15.36 kWh. You give up local control (the listing declares none) and a higher protection rating, and the room has to stay between 5 and 40 °C.
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.