powerwall solar battery

Off Grid Solar Combiner is an important piece of equipment in the off-grid solar power system, mainly used to collect and manage the DC output of solar panels. Here's how it works:

Function:
Current pooling: The output current of the PV series composed of multiple solar panels in series can be pooled together, and then connected to the inverter or DC control system, reducing the connection between the solar PV array and the inverter, simplifying wiring and reducing costs.
Short-circuit protection: The DC fuse is usually installed inside, and when a photovoltaic string has a short circuit and other faults, the fuse can cut off the faulty string in time to avoid affecting other normal working strings and protect the PV string and its conductor.
Lightning protection: Generally, it is equipped with a special lightning surge protector for photovoltaic DC, which can quickly discharge excessive electrical energy when lightning strikes, protect the combiner box and subsequent equipment from lightning damage, and ensure the safe operation of the system.
Anti-reverse connection protection: It has the function of anti-reverse access to prevent damage to the equipment due to the positive and negative poles of the photovoltaic series, and the anti-reverse diode in the box can prevent the circulation between the strings.
Condition monitoring: Some combiner boxes are equipped with data acquisition modules, which can sample and monitor the current and other signals of each photovoltaic array, and some can also view the real-time status through the human-machine interface, or realize remote monitoring, so that users can understand the operation of the system.

Structural composition:
Box: Generally made of steel plate spraying, stainless steel or engineering plastics, etc., the protection level usually reaches IP54 or above, with good waterproof and dustproof performance, and can adapt to the harsh outdoor environment.
DC circuit breaker: as the output control device of the combiner box, used for the opening / closing of the line, because the output of the solar module is direct current, it is easy to produce arc when breaking, and it is usually necessary to choose a special DC circuit breaker for photovoltaics.
DC fuse: DC fuse for photovoltaics, rated working voltage up to DC1000V, when abnormal current inflow occurs, the fault string can be quickly withdrawn from the system operation.
Anti-reflection diode: The main function is to prevent the circulation current between strings and ensure the normal operation of the system.
Data acquisition module: Hall current sensor and single-chip microcomputer technology are used to sample the current signal and convert it into digital output, so as to grasp the working status of the power station in real time.
Protection unit: Usually a DC high-voltage surge protection unit, with dual self-protection functions of overheating and overcurrent, which can be replaced with live electricity and has a deterioration display window.

The Core of Household Energy Backup - Off Grid Switch Box 

With our Off Grid Switch Box, you can realize the unlimited potential of the convenient power supply, which will become the center of your home backup system, automatically and intelligently switching the power supply to your home loads, providing uninterrupted power during power outages, intelligent energy management and much more.

Power Outage Automatic Switching

Adapt to all bidirectional portable energy storage systems