Why DC Combiner Box Is Essential for PV Systems
If you're a solar system buyer, installer, or project manager, let's get straight to the point—you're here because you need a definitive answer: Does your solar system really need a DC combiner box? A

• With two-station design (commonly used for A and standby for B), suitable for AC systems with AC 50-6ohz and rated current 6A-63A.
• Switch is when the main power (common power supply A) fails, the ATS will automatically switch to the backup power (Backup powersupply B) to continue working (switching speed <50 milliseconds).
• The temperature range of the operating environment is -5°C~+40°C,and theaverage temperature within 24 hours shalbe lower than +35°C.



| Parameter | ||
| Case grade | 63 | |
| Rated operating current le(A) | 6A/10A/16A/20A/25A/32A/40A/50A/63A | |
| Rated insulation voltage UL | 690V | |
| Rated impulse withstand voltage Uimp | 8kV | |
| Rated working voltage Ue | AC220V/AC110V | |
| Rated working voltage Ue | 50/60Hz | |
| Class | PC class: can be switched onand loaded without generatingshort-circuit current | |
| Pole number | 2P | 4P |
| Rated short-circuit current Iq | 50kA | |
| Short circuit protection device (fuse) | RT16-00-63A | |
| Rated impulse withstand voltage | 8kV | |
| Control circuit | Rated control voltage Us:AC220V,50Hz Normal working conditions:85%Us-110%Us | |
| Auxiliary circuit | AC220V/110V 50Hz Le=5A | |
| Contactor change-over time | <50ms | |
| Operation change-over time | <50ms | |
| Return change-over time | <50ms | |
| Power off time | <50ms | |
| Change-over operation time | <50ms | |
| Mechanical life | >8000times | |
| Electrical life | >1500 times | |
| Usage category | AC-31B | |


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