What is interver?
Main Contents
An inverter is an electronic device that converts DC power (such as the DC power generated by solar panels) into AC power (such as the power used by household electrical grids). Inverters play an important role in renewable energy systems, particularly in solar and wind energy systems.Thus inverters have a wide range of applications and can be used in various transportation vehicles. They also play an irreplaceable role in the field of solar and wind power generation. Previously, lead-acid batteries were used in the internal batteries of inverters. Can inverters use lithium batteries?
Functions of Interver?
Conversion of current type: Inverters convert DC power into AC power. As most modern electronic devices and home appliances require AC power to function properly, inverters allow solar or other DC power sources to supply these devices.
Output voltage control: Inverters are capable of monitoring and adjusting the output AC voltage to ensure it meets the required standards. This can ensure that devices connected to the inverter can operate properly and protect them from the effects of overvoltage or undervoltage.
Intelligent management and protection functions: Some advanced inverters have intelligent management and protection functions that can monitor and optimize the efficiency of energy usage. They can detect and adapt to different load conditions to provide the best power conversion effect and protect against faults such as overload, short circuit, and voltage fluctuations through circuit protection.
Network connection and monitoring: Some inverters have network connection capabilities that allow them to be connected to a monitoring system via the Internet for remote monitoring and management. Such functions enable users to monitor real-time electricity production, fault status, and performance parameters, etc., in order to take necessary maintenance measures in a timely manner.
Can intervers use lithium batteries?
Yes. As we all known that, lead-acid batteries have many advantages such as stable voltage, low price, simple maintenance, stable quality, and high reliability, so lead-acid batteries have long occupied the battery selection of products that require high-capacity batteries before lithium batteries came out. However, lead-acid batteries also have disadvantages such as low energy density, short service life, frequent maintenance, and high risk of internal material leakage, which gradually lead to their replacement by lithium batteries as lithium batteries were developed.
As a product that also uses lead-acid batteries as internal batteries, can inverters have their internal lead-acid batteries replaced by lithium battery packs?
Currently, there are still many inverters equipped with lead-acid batteries. The main reason for equipping lead-acid batteries is their stability and low cost. Businesses want to make money, and some consumers also want to buy inverters that can meet basic requirements at a lower price. Therefore, there is still a market for lead-acid inverters.
As a product that also uses lead-acid batteries as internal batteries, can inverters have their internal lead-acid batteries replaced by lithium battery packs?
Currently, there are still many inverters equipped with lead-acid batteries. The main reason for equipping lead-acid batteries is their stability and low cost. Businesses want to make money, and some consumers also want to buy inverters that can meet basic requirements at a lower price. Therefore, there is still a market for lead-acid inverters.
Three main functions of energy storage inverters:
Energy storage inverters have three main functions, including peak shaving, backup power, and independent power supply. From a regional perspective, peak shaving is in demand in Europe. Taking Germany as an example, in 2019, the electricity price in Germany has reached 2.3 yuan/kWh, ranking first in the world.
In recent years, the electricity price in Germany has continued to rise. In 2021, the residential electricity price in Germany has reached 34 euro cents/kWh, while the LCOE of PV/PV with storage is only 9.3/14.1 euro cents per kWh, which is 73%/59% lower than the residential electricity price. The difference between the residential electricity price and the cost of electricity generated by PV with storage will continue to widen. Household PV with storage systems can reduce electricity costs, so users in high electricity price areas are motivated to install household energy storage systems.
Backup power supplies are needed by the United States and Japan, while independent power supplies are in demand in markets such as South Africa. According to EIA, the average power outage time in the United States exceeded 8 hours in 2020, mainly due to the dispersed residence of US residents, aging of some power grids, and natural disasters.
The application of household photovoltaic energy storage systems can reduce reliance on the grid and increase the reliability of power supply on the user side. The photovoltaic energy storage system in the United States is relatively large and equipped with many batteries because it needs to store electricity to cope with natural disasters. Independent power supplies are in demand in markets such as South Africa, Pakistan, Lebanon, the Philippines, and Vietnam, where the country’s infrastructure is insufficient to support people’s electricity use in the context of a tight global supply chain. Therefore, users need to equip themselves with household photovoltaic energy storage systems.
How to Configure Intercer with lithium battery?
1.Choose a lithium battery with the same input voltage as the inverter battery terminal.
2.Configure battery capacity according to customer’s backup power requirements.
Example
If the customer selects a 10 kW, 48 V battery voltage input inverter, and needs 2 hours of backup power, we recommend a 48 V lithium battery to the customer. The total energy required for 2 hours of backup power is 10 kW * 2 hours = 20 kW (20 kWh). We can recommend 5 parallel 48 V 100 Ah 1C discharge lithium batteries to the customer, with each individual battery providing energy of battery discharge voltage * battery discharge current = 48 V * 100 A = 4800 W. 4800 W * 5 = 24000 W = 24 kWh (we can configure a slightly higher capacity to avoid the battery being discharged too low and improve its lifespan).
3.Consider whether the maximum discharge power of the battery matches the power of the inverter.
Example: The customer selects a 10KW inverter and wants to configure a battery with a nominal voltage of 51.2V, 100AH, and 1C discharge. The discharge power of the battery with a nominal voltage of 51.2V, 100AH, and 1C discharge is 5120W. If the provided energy cannot fully load the inverter (loading 10KW on a 10KW inverter is considered full load), the battery can only provide 5120W power to the inverter, which means the inverter cannot run at full load. It is recommended that the customer configure at least two 51.2V, 100AH lithium batteries or more.
