This report updates those cost projections with data published in 2021, 2022, and … Contact online >>
This report updates those cost projections with data published in 2021, 2022, and
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LG is a leader in the home electronics industry. LG''s battery subsidiary, LG Chem, produces one of the most popular batteries in the U.S. market: the LG Chem RESU 10H battery. One of LG''s new models, the RESU Prime, is a fully integrated energy storage system that includes an inverter and smart energy management software at a more compact size than the original. If you have solar on your property and install a home battery like the LG RESU or RESU Prime, you can store excess solar electricity to use later in the day or during power outages. As a result, properties with solar-plus-storage can increase their total monthly savings in certain markets.
This is an unbiased review: EnergySage is not paid to review brands or products, nor do we earn money from affiliate advertising in this article. The content of this blog is based on research and information available at the time of writing. Learn more about our mission and how we make money as a company.
The LG Chem RESU 10H costs between $9,500 and $13,000 with a full system installation.
The LG Chem RESU 16H Prime costs between $11,000 and $15,000 with a full system installation.
A qualified EnergySage-approved installer can give you the best information about the RESU and RESU Prime home battery system and other energy storage options available to homeowners today.
The LG Chem RESU and RESU Prime pair well with solar panel systems, especially if your utility has reduced or removed net metering, time-of-use rates, or demand charges. Installing a storage solution like the LG Chem RESU or RESU Prime with a solar energy system allows you to maintain a sustained power supply during the day or night as long as you store enough power from your panels when the sun is shining.
As with many other home battery products, these batteries are sized for day-to-day use at your home and are often paired with a home solar panel system. When your solar panels produce more electricity than you can use in your home, you can store the excess electricity in the battery system instead of sending it back into the grid. Later, when your panels aren''t producing enough electricity to meet your home''s needs, you can use the electricity stored in your battery instead of having to buy it from your utility company.
When you''re evaluating solar batteries, you''ll want to keep in mind various important metrics and technical specifications. Among the most important are the size of the battery (power and capacity), its chemistry, depth of discharge, and roundtrip efficiency.
Two of the most important metrics are power and usable capacity. Power (measured in kilowatts, or kW) determines the maximum amount of electricity that a battery can output at a single time, while usable capacity (measured in kilowatt-hours, or kWh) is a measure of the maximum amount of electricity from your battery on a full charge. The LG Chem RESU 10H boasts a maximum power rating of 5.0 kW to go along with 9.3 kWh of usable capacity.
The RESU Prime comes in two sizes – the RESU 10H Prime and the RESU16H Prime. The RESU Prime boasts a maximum continuous power rating of 7 kW to go along with 16 kWh of usable capacity in their 16H model. In comparison, the 10H model offers 5 kW of maximum power along with 9.6 kWh of storage capacity. The RESU systems are also, to an extent, modular, meaning you can add multiple battery products to your storage setup. You might want to install multiple RESU or RESU Prime batteries for a home with high energy demands, although LG Chem recommends no more than 2 RESU or RESU Prime batteries wired together in parallel.
Think of your battery like water running through a pipe. Energy capacity is the amount of water available to push through the pipe, while power is the size of the pipe itself. Larger pipes allow more water to flow through at once, which depletes the water faster. Similarly, a battery with a high power rating can deliver more electricity at one time but will burn through its available energy capacity faster too.
A battery''s power determines what appliances you can run with at once, while usable capacity determines how long those appliances can be run. Batteries with a higher power rating are capable of powering more robust appliances or many appliances at once, while batteries with a higher usable capacity can store more total energy and thus can run your appliances for longer periods of time without needing to recharge.
The functionality of one solar battery next to another can vary; some batteries have excellent off-grid capabilities, while others offer software solutions for rate arbitrage. Here the important qualities of the LG Chem RESU:
LG Chem has made a concerted effort to ensure their battery is compatible with most common brands and types of off-grid and hybrid inverters. This means that as long as your installer installs the correct components, your LG Chem battery will be able to provide backup power for your home when the grid goes down.
The LG Chem RESU is a lithium-ion storage product; specifically, it is a lithium nickel manganese cobalt oxide (NMC) battery. This is one of the most common lithium-ion battery technologies, and for a good reason: relative to other types of batteries, NMC batteries are known for their high energy density (the amount of energy they can store relative to the physical space they take up) and increased safety. To learn more about how different lithium-ion battery chemistries stack up against one another, check out our overview of battery chemistry differences.
Two key ways to evaluate the performance of a solar battery are its depth of discharge and roundtrip efficiency.
Depth of discharge (DoD) indicates the percentage of a battery''s energy that has been discharged relative to the overall capacity of the battery. Because the useful life of a battery decreases each time you charge, discharge, and re-charge it, many battery manufacturers specify a maximum DoD level for optimal battery performance. In general, batteries with a higher depth of discharge are considered better quality products. The LG Chem RESU boasts a depth of discharge of 95 percent across all battery sizes, reflective of its safe and advanced NMC battery chemistry. The RESU Prime boasts an excellent depth of discharge of 100%.
Roundtrip efficiency is a measure of electrical losses involved with charging and discharging a battery. The higher the efficiency percentage, the more efficiently the battery is able to convert incoming electricity into stored electricity and then back into usable electricity. The LG Chem RESU line has a high roundtrip efficiency of 94.5 percent; this means that for every 10 kilowatt-hours (kWh) of electricity you put into the battery, you''ll receive 9.45 kWh of output. The RESU Prime has a roundtrip efficiency of over 90 percent; this means that for every 10 kilowatt-hours (kWh) of electricity you put into the battery, you''ll receive about 9 kWh of output.
LG Chem RESU performance metrics
LG Chem RESU and RESU Prime model comparison
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