| Low voltage LV (48 V) | High voltage HV | |
|---|---|---|
| Usually fits | Homes and villas with moderate backup loads | Large villas and facilities with bigger loads and capacity |
| Current | High, needing larger cables and protection | Lower at the same power |
| Safety | Lower touch voltage risk | Needs qualified technicians and dedicated isolation and safety means |
| Compatibility | Wide options. Inverter to battery communication is checked | Follow the manufacturer compatibility list |
In our calculator HV is suggested when current exceeds 200 A on a 48 V bus, or capacity exceeds 30 kWh. This is an estimating rule. The final decision belongs to an engineer after reviewing datasheets.
Questions that set the size
- Which circuits must run during an outage? Do they include AC units?
- How many backup hours do you actually need?
- Will the battery cycle daily? Cycling uses battery life, so compare it against the night tariff.
Start with numbers
Enter consumption, loads and backup hours to see panel, inverter and battery capacity with a suggested voltage.
Hybrid calculator