Project Example
Located in Germany, the roof of a villa with solar panels covers an area of 80 square meters, and a family of three people live.
1. Power Analysis
Before installing a photovoltaic system, list the power and quantity of all the loads in the home
|
LOAD |
POWER(KW) |
QUANTITY |
TOTAL POWER(KW) |
|
Light A |
0.06 |
2 |
0.12 |
|
Light B |
0.03 |
2 |
0.06 |
|
Refrigerator |
0.15 |
1 |
0.15 |
|
Air conditioning |
2 |
1 |
2 |
|
washing machine |
0.5 |
1 |
0.5 |
|
TV |
0.08 |
1 |
0.08 |
|
Dishwasher |
1.5 |
1 |
1.5 |
|
Induction cooker |
1.5 |
1 |
1.5 |
|
TOTAL POWER |
5.91 |
||
2. Electricity Consumption Analysis
The daily working time and total power consumption of each load determine the battery capacity that needs to be matched.
The capacity selection is based on the household electricity consumption, and the battery can also be configured according to their own electricity consumption at night, which can maximize the separation from the grid, save electricity bills, and improve the economic benefits of photovoltaic
|
LOAD |
POWER(KW) |
QUANTITY |
Working Time-H |
Daily electricity consumption(KWh) |
|
Light A |
0.06 |
2 |
6 |
0.72 |
|
Light B |
0.03 |
2 |
6 |
0.36 |
|
Refrigerator |
0.15 |
1 |
24 |
3.6 |
|
Air conditioning |
2 |
1 |
3 |
6 |
|
washing machine |
0.5 |
1 |
1 |
0.5 |
|
TV |
0.08 |
1 |
5 |
0.4 |
|
Dishwasher |
1.5 |
1 |
1 |
1.5 |
|
Induction cooker |
1.5 |
1 |
1 |
1.5 |
|
TOTAL POWER |
14.58 |
|||
3. Photovoltaic Panel Selection
The area of the roof, the orientation of the roof, and the total power of the photovoltaic panel can be matched by the inverter.
4. Energy Storage Inverter Selection
Newly installed solar system, select hybrid inverter
Grid-connected system transformation wants to match energy storage batteries. The first uses the AC coupled scheme, and the second directly replaces the inverter.
5. Energy Storage Battery Selection
The selection process of the battery needs to take into account the theoretical and actual power of the battery, and the battery will have a SOC protection value to avoid excessive discharge of the battery to the battery damage. We need to pay attention to the DOD parameters of the battery in the process of purchasing the battery.
Summarize
Photovoltaic capacity according to the roof area and the inverter allowed power configuration. The inverter needs to consider whether the off-grid or hybrid type, the load of the home is single-phase or three-phase. Batteries need to be combined with household electricity consumption. If you start to consider a low-cost purchase system, you can buy a small-capacity battery, and according to your own situation, you can increase the battery capacity in the later stage.