Solar energy systems are necessary for areas that are always prone to power outages and power restrictions during peak hours.
However, there are a lot of sizes of solar energy storage products.
What’s the best solar power system for me? How do you choose the most suitable product for yourself?
What size solar energy system do I need?
Based on the situation on the user demand side and the manufacturer supply side, the general size of 10KW is enough for ordinary families.
It can keep the following household loads (electrical appliances) away from high electricity bills or operate normally in power-deficient areas:
| 10000 watt solar wind generator Load Reference | |||
| Load Name | Load Rated Power | QTY | Total Rated Power |
| lights | 11W | 20 | 220 |
| Fan | 80W | 4 | 320 |
| Computer(LCD display) | 150W | 2 | 300 |
| Fax machine | 150W | 1 | 150 |
| refrigerator(200L) | 120W | 1 | 720 |
| Washing machine | 300W | 1 | 300 |
| Electric cooker | 300W | 1 | 300 |
| Air conditioner(1HP) | 750W | 3 | 6750 |
| Satellite TV receiver/VCD | 25W | 1 | 25 |
| Color TV(32 inch) | 150W | 1 | 150 |
| Water pump | 100W | 1 | 400 |
| Total | 9635W | ||
| Remark: The refrigerator, air conditioner and water pump are inductive loads, start working power is 3-6 times more than normal power, in the process of use, turn on the inductive load first | |||
However, household electricity consumption is not static. So if you are sure to install a household solar energy storage system, it is best to choose a “modular” product.
This will make the entire system more flexible and convenient for installation and maintenance.
For example, PVMars’s power storage treasure can stack 1-9 batteries in order according to the power demand of users at different stages.
Each battery stores 5.12kWh of electricity, with a cycle life of more than 10,000 times, providing more than 10 years of service.
Also, you can read “How many solar panels will I need” for different types of electricity usage scenarios.
How long does it take for a home solar system to pay back?
How long it takes to pay back depends on the cost of the products you purchase and your electricity bills, so we can only build a preliminary model to calculate it for reference only.
PVMars conservatively calculates based on 5KW home solar energy storage systems, choosing a high-end model with an initial cost of $3,000, and calculating based on the city electricity price of USD 1.5/kWh and the cost of $3,000.
Power generation of 5KW high-end model = 5600W × 4H (average sunshine time) × 360 days = 8064kWh/year
Electricity price of public utility grid = 8064kWh × USD 1.5/kWh = USD 12,096/year
Then, annualized return on investment = 12,096 ÷ 3000 = 4.032
In other words, under the premise of proper use and operation of the solar energy storage system, it can be paid back in about 4 years.
According to the life of the equipment, it can basically be guaranteed to be around 25 years, that is, the net profit cycle is around 20 years, which is quite cost-effective.
However, it should be noted that the electricity price is not uniform but will be affected by multiple factors.
Electricity prices differ mainly because of
Regional differences: Electricity prices vary greatly in different states, cities, and even different regions of the same state. It’s usually more expensive to get electricity in Hawaii than in Nebraska, for instance.
Seasonal changes: Electricity demand fluctuates in different seasons, so electricity prices will also adjust accordingly. Generally speaking, electricity prices will be slightly higher during the peak period of summer electricity consumption.
Electricity consumption: Most power companies will adopt a tiered electricity price, that is, the greater the electricity consumption, the higher the price per kilowatt-hour.
Electricity source: The different costs of different electricity sources (such as hydropower, nuclear power, coal-fired power generation, etc.) will also affect the final electricity price.
Government subsidies and taxes: The government’s subsidy policy and local taxes will also have a certain impact on electricity prices.
Different users have different budgets for purchasing solar products, so there will be differences in the results of the calculation. The specific return on investment should be calculated based on the actual situation.
If you need a customized solar energy storage solution, please send an email to [email protected] or WA: +86 13006765367.
Provide your electricity usage and specific budget, and you can get a PV energy storage solution worth US$200 for free.
Only by designing the residential/industrial and commercial solar energy storage system in advance. You will achieve independent electricity use and a sustainable and healthy life as soon as possible!
