Installing Off-Grid Solar Power System at office Da Nang.
Introduce
Solar power is an inexhaustible source of renewable energy that nature offers us. Along with other renewable energy, solar power will be an additional generation of electricity, to replacing traditional energy that is exhausted in the future, contributing to limiting the impact on the environment as well as contributing to ensuring energy security and sustainable development in the future.
The main components of a solar power system photovoltaics (PV) panels that are connected together to form a system, the solar panels convert sunlight into electric energy, which is Direct Current (DC) This current is then sent to an inverter. The solar inverter then converts the DC to Alternating Current (AC), thus making it power the electrical items. This electricity is then routed to the grid ( On-grid system ) or storage on batteries ( Off-grid system ). In addition, it is possible to combine the above two systems (Hybrid system).
Vietnam is considered a country with great potential for solar energy, the average solar radiation intensity during the year about 4.6 kWh/m2/day. Solar energy in Vietnam is available all year round, is quite stable, and widely distributed in different regions. Average hours of sunshine per year range from 1,800 to 2,600 hours.
Solution
From the above advantages, as well as the need to save power consumption, ensure stable power supply, backup in case of power off. ARV (ASTI Research & Development Vietnam) has recently completed the design and installation of solar power system for the company’s office with a test power of 2kWp.
The list of equipment using solar power:
|
No |
Equipment | Quantity |
|
1 |
Dell laptop |
10 |
|
2 |
PC monitor |
10 |
| 3 | Server |
01 |
The project uses solar panels of Jinko Solar. This is the leading brand of solar cells today, standing at number 1 in the Tier-1 rankings for many years. The inverter uses an off-grid Voltronic inverter, use 4 12V-100Ah batteries for storage. Daily electricity generated is 5.5 – 7.2 kW on sunny days, and 2-3.3 kW on cloudy and rainy days. The system monitored and controlled by the internet.
The main components of a solar power system:
|
No |
Name | Maker |
Quantity |
|
01 |
Jinko Solar Panel poly ( 330Wp, PERC, Half-cut cells ) | Jinko Solar | 06 pcs |
|
02 |
Off-Grid Voltronic Inverter ( Axpert VM II 3kW-24V ) | Voltronic | 01 pcs |
|
03 |
Schneider AC MCB ( 2P 25A, 32A 6kA ) | Schneider | 02 pcs |
|
04 |
FEEO DC MCB ( 4P 63A 1000VDC) | FEEO | 01 pcs |
|
05 |
Lovato DC MCB ( 2P 32A 1000VDC ) | Lovato | 01 pcs |
|
06 |
Lovato DC SPD ( 20kA 1500VDC ) | Lovato | 01 pcs |
|
07 |
Cadivi Solar Cable 4mm2 – 1000V | Cadivi | 20 m |
|
08 |
Cadivi Electrical Wire ( 2×3.0) | Cadivi | 10 m |
|
09 |
Electrical Enclosure Box 12 Ways | Hensel | 01 pcs |
|
10 |
MC4 – 1500V Connecter | LEADER | 10 pcs |
|
11 |
Iron Frame | Vietnam | 06 pcs |
Utility provides power to the loads only when any one condition happens:
– Solar energy is not available
– Battery voltage drops to low-level warning voltage or the setting point.
Solar power system capacity depends on office opening hours, if the office works early, the output of electricity will be more. Especially after cleaning the solar panels and after it rains, more electricity is produced.
