Direct answer
A DC isolator switch provides manual disconnection for PV DC circuits. It is selected by voltage, current, pole configuration, enclosure rating and installation position.
Isolator requirements vary by market and project practice, so the quote should state whether the device is loose, enclosed or built into a combiner box.
Core procurement parameters
| Voltage class | 1000V / 1500V DC options |
|---|---|
| Current rating | Project-specific according to string or output current |
| Mounting | Loose device, IP enclosure, or combiner assembly |
| Use position | Inverter input, combiner input/output, DC distribution |
Applications
- PV inverter isolation
- Combiner box switching
- Rooftop DC disconnects
- C&I maintenance isolation
Available options
- Enclosed isolator
- Panel-mounted switch
- Integrated combiner switch
- Custom labels
QC points before shipment
Check DC rating
Inspect enclosure IP rating
Confirm handle operation
Review terminal and gland layout
FAQ
Is a DC isolator the same as a breaker?
No. An isolator is mainly for manual disconnection. Breaker protection depends on the device type and rating.
Can the isolator be built into a combiner box?
Yes. It is often integrated with fuses, SPD and output protection.