We specialize in providing comprehensive solutions from consulting, surveying, designing, supplying equipment and materials to construction and installation, warranty and maintenance for solar projects in Vietnam.

Solar Project in Dak Lak

Installing the panels Grid-connected solar power system solution
  1.1. The operating principle of the system– Solar battery system will receive solar radiation and convert into a direct current (DC). DC will be converted by an inverter and become alternating current (AC) and join the power grid to supply the load.- Grid-connected inverter has built-in maximum power point detector (MPPT) to make the most of the electricity generated from solar panels. In addition, the grid inverter also has a current detector, voltage and phase of the grid to synchronize solar power with the power grid.

   The system works in three cases as follows:
• Case 1: When the generated capacity is larger than the consumed load capacity, the power will be return to the grid by the system. On the other hand, if the generated capacity is less than the demand then the grid will automatically compensate to supply the demand load.
• Case 2: when it is sunny and the power is out, the system will also stop working to ensure safety (Islanding protect function).
• Case 3: The system only works during the day (when there’s sunshine) so at night the system will hibernate and automatically restart again the next morning.   

        1.2. Surveillance communication
All power generated data and operating status of the system will be transferred by WIFI200 communication device (for wireless network), ENET200 (for wired network), GPRS200 (for transmission via mobile network data) are  exchanged and transfer to Cloud for storage daily, monthly and yearly.
Communication solutions can help operators monitor the system by phone, computer and tablet … through the internet.Communication solutions will also help suppliers to monitor the system and support the customers at the right time.

   2.  Installing the panels.                                                               Analysis of roof surface

     2.1. Frame construction
– Roof area 1, 2, 3 with frame constructed from aluminum rail, installed close to the roof with a tilt of 90 0- The battery platform is installed with a specialized aluminum frame with the following equipment:
+ Aluminum rail (4) and connecting devices (1)+ Middle Pad (2) and End Pad (3).
+ L-shaped support linked leg and purlin with Rail (5).                                                                            Details of SOLAR sheet and roof

      3. Power system solution
– Construction of R&D factory electrical system: Inverter and electrical cabinets are installed on the wall in R&D workshop. The DC cable that goes from the battery platform to the inverter is protected in an iron cable tray.

– Construction of KTCLSP factory electrical system: Inverter and electrical cabinets are installed on the wall in the factory. The DC cable that goes from the battery platform to the inverter is protected in an iron cable tray.

– Construction of Military Medical electrical system: Inverter and electrical cabinets are installed on the wall of Military Medical building. The DC cable that goes from the battery platform to the inverter is protected in an iron cable tray.

– Construction of electrical systems of executive buildings: Electrical cabinets and inverters are installed on the rooftop. The AC cable connects follows the available cable tray and connect to the main floor switchboard.

4. Specifications of equipment used in the system
4.1. Solar panels

	Electrical part specifications
	CapacityMax (Pmax):	385Wp
	Operating voltage (Vmpp):	37.8 V
	Operating current (Impp):	9.13A
	Open circuit voltage (Voc):	46 V
	Operating current (Isc):	9.69A
	Efficiency module:	17.74%
	Parameters affected by temperature
	Power attenuation factor:	-0.39%/0C
	Voltage attenuation coefficient:	-0.29%/0C
	Current attenuation coefficient:	0.005%/0C
	Mechanical specifications
	Cell type:	Poly-Percium
	Number of cell:	72
	Number of bypass diode:	3
The panels are designed and tested according to international standards for quality (IEC 61215) and safety standards (IEC 61730, UL 1730).	Size:	1960x992x35 mm
	Mass:	22.4
	Tempered glass thickness:	3.2mm
	Connection port	T4

    4.2. Grid inverter

	DC power input
	Capacity max (W):	26000
	Voltage max (V):	1000
	Starting voltage (V):	220
	Operating voltage range (V)	180 – 800/610
	Optimal operating voltage range (V):	400 – 800
	The number of MPPT	2
	Current per MPPT (A)	30
	AC power output
	Output power (W):	25000
	Max current (A)::	40
	Operating voltage range (V):	230/400
	Operating frequency range (Hz):	50Hz – 60Hz
	Harmonic distortion	<3%
	Power factor	98.3%
The inverter is designed and tested according to international standards such as operating environment conditions (IECu 60068), performance testing (IEC 61683), Grid connection standard (IEC 61727), level test electromagnetic compatibility (IEC 61000), Compliance with safety and protection standards (IEC 62109, IEC 62116: 2014).	System parameters
	Maximum performance	98.3%
	Efficiency MPPT	99.9%
	Cooling	Fan speed regulator
	Standard protection	IP65
	Working temperature	-250C ~ +600C
	Noise level	<50dB
	Size	480x610x204

	DC power input
	Max power (W):	54300
	Max voltage (V):	1100
	Starting voltage (V):	200
	Operating voltage range (V)	280 ~ 850/610
	Optimal operating voltage range (V):	550 ~ 850
	The number of MPPT	2
	Current per MPPT (A)	75
	AC power output
	Output power (W):	50000
	Max current (A):	72.5
	Operating voltage range (V):	310 ~ 480V
	Operating frequency range (Hz):	50Hz – 60Hz
	Harmonic distortion	<3%
	Power factor	-0.8~+0.8
The inverter is designed and tested according to international standards such as operating environment conditions (IEC 60068), performance tests (IEC 61683),	System parameters
	Maximum performance	98.9%
	MPPT performance	99.9%
Grid connection standards (IEC 61727), level test electromagnetic compatibility (IEC 61000), Compliance with safety and protection standards (IEC 62109, IEC 62116: 2014).	Cooling	Quạt điều tốc
	Standard protection	IP65
	Working temperature	-250C ~ +600C
	Noise level	<50dB
	Size (HxWxD)	810x645x235

4.3 Electrical cabinet

4.4. Wire

PV-1F cable::	Manufacturer: Baohing (China) Protective shell: XLPE, Insulation class: XLPE Standard: TUV 2 PfG 1169/082017, UL4703 Operating voltage: 1000VDC Working temperature: 900C
Cable CXV:	Manufacturer: Lion (Korea) Protective shell: PVC, Insulation: XLPE Standard: IEC 60502 Operating voltage: 600 / 1000VAC Working temperature: 900C