Stand-alone systems are independent from the utility grid,avoiding the possibility of losing power when the grid goes down.Electricity from stand-alone systems are used on site,such as an RV or cabin.Power that is generated can be stored in batteries and used at night or on sunless days. A generator may also be used for back-up.For PV applications,the size of a stand-alone system is usually up to 50kW.
The system diagram as follow)
System includes:
1. PV Array: A number of PV panels connected in series and/or in parallel giving a DC output out of the incident irradiance. Orientation and tilt of these panels are important design parameters, as well as shading from surrounding obstructions.
2. PV controller:control battery bank charge and discharge reasonable and safety.
3. Inverter: A power converter that inverts the DC power from the panels into AC power.The characteristics of the output signal should match the voltage,frequency and power quality limits in the supply network.
4. Battery bank: can be a single battery or multiple batteries connected together to create essentially one large battery of the required voltage and amp-hour capacity.In some ways the battery configuration and capacity are the most important electrical power decision to make, and a wise choice can help guarantee a steady supply of electrical power as well as a system that is simple to operate and maintain.
5. Loads: Stands for the network connected appliances in the building that are fed from the inverter, or, alternatively, from the grid.
SN5KS~30KS
Highlights:
1.DSP controller
2.Using the fifth generation IPM form MITSUBISHI company as the power compent
3.High efficiency up to 94%
4.A LCD display all system information
5.RS232/485 communication interface
6.Perfect protection function
7.Fault record function
8.Low battery protection
Technical Parameters:
Nominal DC input voltage 24V/48V/110V/220
DC input voltage range 21~32V/42~64V/99~150V/180~300V
Bypass input voltage range 220+/-10%
Nominal Capacity 4KVA~7.5KVA
AC output voltage AC220V+/-3%
AC output Frequency 50+/-0.05HZ
Total Harmonic Distortion(THD) <=4%
Dynamic response 5%,20ms
Power factor 0.8
Overload ability 120%,1min,150%,10s
Crest factor(CF) 3:1
Invert efficiency 94%
Isolate Level 1500VAC,1min
Communication Interfaces RS232/485
Noise level <=40dB
Operation Surroundings Temperature -10~50ˇăC
Operatoin Altitude <=4000m
Size(WxHxD) 400x(750+88)x470mm
400x(1188+88)x470mm
SN1KS~3KS
Highlights:
1.DSP controller
2.Using the fifth generation IPM form MITSUBISHI company as the power compent
3.High efficiency up to 94%
4.A LCD display all system information
5.RS232/485 communication interface
6.Perfect protection function
7.Fault record function
8.Low battery protection
Technical Parameters:
Nominal DC input voltage 24V/48V/110V/220V
DC input voltage range 21~32V/42~64V/99~150V/180~300V
Bypass input voltage range 220+/-10%
Nominal Capacity 1KVA~3KVA
AC output voltage AC220V+/-3%
AC output Frequency 50+/-0.05HZ
Total Harmonic Distortion(THD) <=4%
Dynamic response 5%,20ms
Power factor 0.8
Overload ability 120%,1min,150%,10s
Crest factor(CF) 3:1
Invert efficiency 94%
Isolate Level 1500VAC,1min
Communication Interfaces RS232/485
Noise level <=40DB
Operation Surroundings Temperature -10~50ˇăC
Operatoin Altitude <=4000m
Size(WxHxD) 205x365x425mm(No chainwheel)
482x132.5x450(3U) |
Inverter for stand Alone system