What type of relay should I use?

AQ-A SSR (PhotoMOS), HE-V relay, and 10A and 20A types of EP relays are used for preventing an inrush current into capacitors when charging. We recommend solid state relays for miniaturization and HE-V relay and 10A and 20A types of EP relays for high voltages. Using high-capacity capacitor.

Why do I need a power relay?

Power relays are required as safety measures to protect the power supply system. Power relays are required as safety measures in the event of a defect in or malfunction of the battery or system. AQ-A SSR (PhotoMOS) is used to switch charge and discharge. We recommend solid state relays for applications where there will be frequent ON/OFF switching.

How do I know if my utility needs a relay?

Check your utility’s electrical service requirement (ESR) documentation or interconnection application to see if your utility requires a specific relay type or model. The relay (whether electromechanical or static) will have a default position: normally open and normally closed.

How do you use a solid state relay?

Turn ON both solid state relays for charge and discharge control. Current flows in both directions. In order to prevent over charging, the solid state relay on the charge control side turns OFF. On the discharge side, current will flow because there is a diode.

What happens when a relay is energized or triggered?

When energized (electromechanical) or triggered (static), the relay closes the switch to allow current flow. Normally closed relays are the opposite. When energized (electromechanical) or triggered (static), they open, preventing current flow. Relay switches are shown above in their default “de-energized” position.

Why does a solid state relay turn off?

On the discharge side, current will flow because there is a diode. In order to prevent over discharging, the solid state relay on the discharge control side turns OFF. On the charge side, current will flow because there is a diode. Charge and discharge control is possible by effectively utilizing the internal diodes of the solid state relay.