Photo Voltaic Power Generation System | Energy Manegement Applications - Relays, Solid State Devices -

Photovoltaic Power Generation System

Recommended products

HE-V

For cutoff of solar strings

Programmable Display

Eco-POWER METER

Current Transformer (CT)

*Measuring and displaying power generated, sold, and purchased

HE-N

HE PV

HE-S

LF-G

• For AC safety cutoff
• For operation in stand alone mode

AQZ

For electrical shock
prevention and bypass
(efciency improvement)

For DC safety cutoff

[Junction box]

Inverter

Power
distributor

Load

Grid

Stand
alone

[Power conditioner]

Storage battery

• Battery charge/discharge switching
• For DC safety cutoff
• ★For inrush current prevention

AQ-A	EP	HE-V

Recommended products (AC side)

HE PV

HE-S ※

LF-G

Programmable Display

Eco-POWER METER

Current Transformer (CT)

Inverter

Power
distributor

Load

Grid

Stand alone

* When using HE-S relay.

*Use one 2a1b type
(creation of contact welding monitoring circuit is possible).

Recommended relay	Max. switching current (AC) 22A-35A
Recommended relay	Max. switching current (AC) 120A

For Safety Cutoff on the AC side: Relays are used for safety cutoff on the grid (power network). The relay must cutoff the circuit to prevent abnormal currents that occur from affecting the commercial power supply. Power relays are required as safety measures to protect the power supply system.

For operation in stand-alone mode: Relay contacts will be ON during a power outage and use of the stand-alone function is possible. The relays are used for stand-alone mode.

Eco-POWER METERs/Programmable Displays: These are used for displaying the amount of sold/purchased power of a photovoltaic power generation system and power generated by a power conditioner. Photovoltaic power generation systems and fuel cell systems linked to storage batteries require surveillance of reverse power (tidal current) to grids. Equipped with a fine current detection function, Eco-POWER METERs are ideal for reverse power (tidal current) surveillance.

Recommended products (DC side)

For Solar strings
For Junction box connectors

Recommended relay	*HE-V (2a 20A 1,000V DC)** High-voltage cutoff relay capable of simultaneously cutting off the positive (+) and negative (-) terminals by serially connecting the 1 Form A contact. Up to 1,000V DC cutoff

*1,000 V DC is the maximum allowable voltage when each 1 Form A contact is connected in series. The rating is 800 V DC.

●When something shades the solar panels or a defect occurs, the total power generation efciency of the system decreases. In such cases, the total power generation efciency can be maintained by bypassing low-efciency panels or cutting off strings using relays.
●In case of a disaster, such as re, system safety can be maintained by shorting each solar panel. (E.g. electrical shock prevention of reghters)
●Remote control is possible for maintenance work, reducing maintenance costs.

Recommended relay	AQZ PhotoMOS（1a 10A 60V DC） PhotoMOS capable of frequent switching, improving system reliability

For Junction boxes and Power conditioners

●In case of a disaster, such as re, system safety can be maintained by cutting off the DC line.
●Remote control is possible for maintenance work, reducing maintenance costs.
●Large current cuttoff possible during malfunction when connecting storage battery. (80 to 300A type)

Recommended relay	*EP (1a 10A∼300A 1,000V DC)** High-voltage cutoff relay with capsule contact construction, which provide high reliability

*1,000 V DC is the maximum allowable voltage. The rating is 400 V DC.

	Title	Language	File size	Update
	PMOS_SSR_Selection Specifications are subject to change without notice.	EN	3.6MB	September 15, 2022

	Title	Language	File size	Update
	Panasonic Industry Products for Energy Management	EN	4.8MB	December 6, 2022