How do you choose home backup power solutions?
Introduction:
No matter how big or small your house is, the key depends on whether you have calculated the daily electricity demand for your house in the past and thought about how to meet the daily energy demand in advance. For example, is there a power grid in the area? If not, obviously you need to consider solar panels for free electricity. When you consider these all, you can save a lot of money on your future electricity bills, which also gives you more flexibility to optimize your power distribution scheme. Especially when you decide to live in an environment without a grid power supply, you need to consider a pure off-grid power supply. In this case, it is very necessary to use solar photovoltaic panels to store excess power during the day for use at night.
If there is a power grid in your place, you will have more choices. For example, you can sell your electricity when the electricity price is high (peak electricity consumption) and then obtain additional income. Some data show that reasonable planning is hoped that the cost paid for the daily electricity consumption and the configuration of the corresponding photovoltaic energy storage system will be fully recovered within 6-8 years, and a steady income stream will be created in the following time. So in the long run, a well-planned on-grid/off-grid power system can save you thousands of dollars annually. At present, more and more people realize the significance of doing this, and this has become a popular trend.
Maybe many people are already conscious of building their power supply system, but they don’t know how to start. Today’s article is to help you sort out this problem. Today, we will discuss the following 4 aspects:
- View local guidelines and refer to local State Electricity Guidance documents
- Consider saving energy and reducing consumption from the level of the equipment itself
- Calculation of daily and monthly electricity needs
- How to configure the appropriate number of photovoltaic panels and energy storage battery packs
1. View local guidelines and refer to local State Electricity Guidance documents
If you plan to purchase a set of solar power supply devices and energy storage systems, please be sure to first consult the local power bureau or relevant departments for relevant policy documents. Some countries and regions have clear regulations that all grid-connected systems must sell their electricity. The power grid has precise time, certificates, and equipment security requirements, which must be judged according to local guidance documents. At the same time, it is recommended to consult an experienced electrician to conduct a rational analysis of the power supply system designed for you to avoid irreparable fire or short-circuit hazards caused by erroneous views, or consult our online experts.
2. Consider saving energy and reducing consumption from the level of the equipment itself
When your house is completely dependent on off-grid power, the power you can get every day is limited. If your configuration cannot meet your daily needs, there will be insufficient power, and you will not be able to get additional supplements. In this case, if you have no plans to upgrade your solar panels or add additional energy storage batteries, the best way is to save energy. For example, replace the light bulbs in your home with energy-saving lamps and use induction cookers or microwave ovens instead of using high-power electric ovens. Set the opening time of the air conditioner and close the doors and windows instead of letting the air conditioner run at full power 24 hours a day. Or the simplest is to turn off the lights and unnecessary electrical equipment, which is easy for us to do.
3. Calculation of daily and monthly electricity needs
This question is very simple. Unfortunately, many people may be intimidated by the calculation concept because they don’t know where to start. For example, the electrical equipment in their home is too complicated to calculate accurately. We can calculate the device with the highest power consumption first and then slowly add other devices, which can keep our minds clear. Common reference power includes air conditioners generally 800w-1300w. Household refrigerators are generally 65w-130w, rice cookers are generally 500w, electric irons are generally 750w, fans 66w, microwave ovens 1000w, water heaters generally 1200w, and electric heaters Generally 1200w-1000w. For details, please refer to the actual product manual you purchased. The above powers are constant power; multiply them by time, and you can get the required power consumption. For example, a 1000w device needs 1000wh of electricity to run for 1 hour, which is 1kWh. Concerning this algorithm, we can calculate the daily power consumption of each device based on the approximate running time of different devices every day. Then we can add up the electricity, which is our total electricity consumption for a day.
It is worth noting that some devices do not always run stably at their rated power. For example, the power of an air conditioner is generally about 1000w, but it does not always work at 1000w. When it is just started or is running at high power, the real-time power consumed by the air conditioner may be 1300w, but when it is running stably, it may only be 600w. Therefore, this is not a constant value, so we must take this factor into account when calculating to avoid the result being much larger than the actual value. If you are confused about the calculation, please do not hesitate to contact our online experts to assist you in the calculation.
4. How to configure the appropriate number of photovoltaic panels and energy storage battery packs
After the calculation, we will get an approximate daily electricity consumption. For example, through calculation, you find that you need to use 10kwh of electricity every day. Then you can further analyze, of the 10kwh, 4kwh is used during the day, and 6kwh is used at night. There is no sun at night, so the solar panels will not work at night so you can use 6kwh at night. You need a battery to power you; this is the simplest logic. But in reality, we may need to think more.
- 4kwh during the day can be powered by photovoltaic panels, and 6kwh at night is powered by batteries. Therefore, the power of photovoltaic panels must be large enough, so what kind of power is enough? At this time, you need to calculate. We can start with the local daylight hours. For example, you can check on Google how long the average sunshine time is in your area, such as 4 hours, which means you must complete 10kwh charging within 4 hours during the day. In other words, the power of your solar panel must be at least greater than 2.5kw so that you can charge 2.5kwh per hour, 4 hours to produce 10kwh of electricity.
- Considering that photovoltaic panels are also efficient, we can generally calculate according to the efficiency of 90%. Solar panels themselves also have different powers. Of course, they are limited by materials and processes. Solar panels with different powers have different prices, sizes, and weights. Let’s take the common 260w solar panel as an example. If multiplied by 90% efficiency, the actual power is 234w. If we need a 2.5kw solar panel, we need at least 2500w/234w=10.6, which is 11 solar panels according to the integer calculation. This is how solar panels are calculated.
- Battery usage is also tricky. If we always use the battery according to the maximum design capacity, the life of the battery will decay quickly, so we recommend keeping the depth of discharge for daily use below 80% DoD. That is, we use up to 80% of the 100Ah power for daily use, and the remaining 20% can be used to maintain the battery pack. Considering this idea, if we need to prepare a 6kwh battery pack, we recommend preparing a 6kwh/80%=7.5kwh battery pack.
- Sometimes, we may encounter cloudy days, but the solar panels hardly work on cloudy days. To avoid such unexpected situations, we can reserve 1-2 more days of power to face this situation calmly.
All in all, when we consider the power supply system, we need to consider prolonging the overall life of the power supply system as much as possible so that we can save costs as much as possible and obtain the best benefits. Fortunately, lithium batteries are the proven choice to provide the best performance and longest life. Justlithiumbattery offers a series of battery packs for home energy storage, including wall-mounted battery packs, stackable battery packs, and cabinet batteries. Group, etc. These battery packs can be flexibly expanded according to the power you need. Contact our experts now to provide you with professional guidance and advice.
Author Profile
Thomas Chen
Thomas Chen is a seasoned expert in the new energy industry, with a focus on lithium battery technology. A Shenzhen University alumnus, class of 2010, Thomas has cultivated a wealth of experience through pivotal roles at EVE and BYD. Renowned for his profound insights into the sector, he possesses a unique aptitude for identifying market trends and understanding customer needs. His articles offer a distinctive perspective, drawn from a rich background in the field.
Introduction:
No matter how big or small your house is, the key depends on whether you have calculated the daily electricity demand for your house in the past and thought about how to meet the daily energy demand in advance. For example, is there a power grid in the area? If not, obviously you need to consider solar panels for free electricity. When you consider these all, you can save a lot of money on your future electricity bills, which also gives you more flexibility to optimize your power distribution scheme. Especially when you decide to live in an environment without a grid power supply, you need to consider a pure off-grid power supply. In this case, it is very necessary to use solar photovoltaic panels to store excess power during the day for use at night.
If there is a power grid in your place, you will have more choices. For example, you can sell your electricity when the electricity price is high (peak electricity consumption) and then obtain additional income. Some data show that reasonable planning is hoped that the cost paid for the daily electricity consumption and the configuration of the corresponding photovoltaic energy storage system will be fully recovered within 6-8 years, and a steady income stream will be created in the following time. So in the long run, a well-planned on-grid/off-grid power system can save you thousands of dollars annually. At present, more and more people realize the significance of doing this, and this has become a popular trend.
Maybe many people are already conscious of building their power supply system, but they don’t know how to start. Today’s article is to help you sort out this problem. Today, we will discuss the following 4 aspects:
- View local guidelines and refer to local State Electricity Guidance documents
- Consider saving energy and reducing consumption from the level of the equipment itself
- Calculation of daily and monthly electricity needs
- How to configure the appropriate number of photovoltaic panels and energy storage battery packs
1. View local guidelines and refer to local State Electricity Guidance documents
If you plan to purchase a set of solar power supply devices and energy storage systems, please be sure to first consult the local power bureau or relevant departments for relevant policy documents. Some countries and regions have clear regulations that all grid-connected systems must sell their electricity. The power grid has precise time, certificates, and equipment security requirements, which must be judged according to local guidance documents. At the same time, it is recommended to consult an experienced electrician to conduct a rational analysis of the power supply system designed for you to avoid irreparable fire or short-circuit hazards caused by erroneous views, or consult our online experts.
2. Consider saving energy and reducing consumption from the level of the equipment itself
When your house is completely dependent on off-grid power, the power you can get every day is limited. If your configuration cannot meet your daily needs, there will be insufficient power, and you will not be able to get additional supplements. In this case, if you have no plans to upgrade your solar panels or add additional energy storage batteries, the best way is to save energy. For example, replace the light bulbs in your home with energy-saving lamps and use induction cookers or microwave ovens instead of using high-power electric ovens. Set the opening time of the air conditioner and close the doors and windows instead of letting the air conditioner run at full power 24 hours a day. Or the simplest is to turn off the lights and unnecessary electrical equipment, which is easy for us to do.
3. Calculation of daily and monthly electricity needs
This question is very simple. Unfortunately, many people may be intimidated by the calculation concept because they don’t know where to start. For example, the electrical equipment in their home is too complicated to calculate accurately. We can calculate the device with the highest power consumption first and then slowly add other devices, which can keep our minds clear. Common reference power includes air conditioners generally 800w-1300w. Household refrigerators are generally 65w-130w, rice cookers are generally 500w, electric irons are generally 750w, fans 66w, microwave ovens 1000w, water heaters generally 1200w, and electric heaters Generally 1200w-1000w. For details, please refer to the actual product manual you purchased. The above powers are constant power; multiply them by time, and you can get the required power consumption. For example, a 1000w device needs 1000wh of electricity to run for 1 hour, which is 1kWh. Concerning this algorithm, we can calculate the daily power consumption of each device based on the approximate running time of different devices every day. Then we can add up the electricity, which is our total electricity consumption for a day.
It is worth noting that some devices do not always run stably at their rated power. For example, the power of an air conditioner is generally about 1000w, but it does not always work at 1000w. When it is just started or is running at high power, the real-time power consumed by the air conditioner may be 1300w, but when it is running stably, it may only be 600w. Therefore, this is not a constant value, so we must take this factor into account when calculating to avoid the result being much larger than the actual value. If you are confused about the calculation, please do not hesitate to contact our online experts to assist you in the calculation.
4. How to configure the appropriate number of photovoltaic panels and energy storage battery packs
After the calculation, we will get an approximate daily electricity consumption. For example, through calculation, you find that you need to use 10kwh of electricity every day. Then you can further analyze, of the 10kwh, 4kwh is used during the day, and 6kwh is used at night. There is no sun at night, so the solar panels will not work at night so you can use 6kwh at night. You need a battery to power you; this is the simplest logic. But in reality, we may need to think more.
- 4kwh during the day can be powered by photovoltaic panels, and 6kwh at night is powered by batteries. Therefore, the power of photovoltaic panels must be large enough, so what kind of power is enough? At this time, you need to calculate. We can start with the local daylight hours. For example, you can check on Google how long the average sunshine time is in your area, such as 4 hours, which means you must complete 10kwh charging within 4 hours during the day. In other words, the power of your solar panel must be at least greater than 2.5kw so that you can charge 2.5kwh per hour, 4 hours to produce 10kwh of electricity.
- Considering that photovoltaic panels are also efficient, we can generally calculate according to the efficiency of 90%. Solar panels themselves also have different powers. Of course, they are limited by materials and processes. Solar panels with different powers have different prices, sizes, and weights. Let’s take the common 260w solar panel as an example. If multiplied by 90% efficiency, the actual power is 234w. If we need a 2.5kw solar panel, we need at least 2500w/234w=10.6, which is 11 solar panels according to the integer calculation. This is how solar panels are calculated.
- Battery usage is also tricky. If we always use the battery according to the maximum design capacity, the life of the battery will decay quickly, so we recommend keeping the depth of discharge for daily use below 80% DoD. That is, we use up to 80% of the 100Ah power for daily use, and the remaining 20% can be used to maintain the battery pack. Considering this idea, if we need to prepare a 6kwh battery pack, we recommend preparing a 6kwh/80%=7.5kwh battery pack.
- Sometimes, we may encounter cloudy days, but the solar panels hardly work on cloudy days. To avoid such unexpected situations, we can reserve 1-2 more days of power to face this situation calmly.
All in all, when we consider the power supply system, we need to consider prolonging the overall life of the power supply system as much as possible so that we can save costs as much as possible and obtain the best benefits. Fortunately, lithium batteries are the proven choice to provide the best performance and longest life. Justlithiumbattery offers a series of battery packs for home energy storage, including wall-mounted battery packs, stackable battery packs, and cabinet batteries. Group, etc. These battery packs can be flexibly expanded according to the power you need. Contact our experts now to provide you with professional guidance and advice.
Author Profile
Thomas Chen
Thomas Chen is a seasoned expert in the new energy industry, with a focus on lithium battery technology. A Shenzhen University alumnus, class of 2010, Thomas has cultivated a wealth of experience through pivotal roles at EVE and BYD. Renowned for his profound insights into the sector, he possesses a unique aptitude for identifying market trends and understanding customer needs. His articles offer a distinctive perspective, drawn from a rich background in the field.
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