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Panasonic is one of the world''s largest battery cell manufacturers, and they made their foray into the energy storage industry in 2019 when they launched their residential battery storage product: the EverVolt. A scalable storage system with both AC and DC-coupled configurations, the EverVolt can provide plenty of backup energy for your home in the event of a grid outage, especially when you pair it with a solar panel system. In November 2021, Panasonic announced a new addition to its battery lineup: the EverVolt 2.0. While Panasonic will continue to sell models of the original EverVolt, the EverVolt 2.0 comes with new features, including different lithium-ion battery chemistry, larger available sizes, and an outdoor rating.
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The original Panasonic EverVolt comes in four models: two AC coupled (EVAC-105-4 and EVAC-105-6) and two DC coupled (EVDC-105-4 and EVDC-105-6).
The Standard model of the original EverVolt offers 4.6 kW of power and 11.4 kWh of usable capacity, and the larger Plus model offers 5.5 kW of power and 17.1 kWh of usable capacity.
The Panasonic EverVolt 2.0 comes in two different models: the EVHB-L6 with 17.1 kWh usable capacity and the EVHB-L9 with 25.65 kWh usable capacity.
The EverVolt 2.0 uses lithium iron phosphate (LFP) battery chemistry and can be installed outdoors, while the original Evervolt uses a lithium nickel manganese cobalt oxide (NMC) battery.
Your EverVolt 2.0 storage system can be either AC- or DC-coupled: the system comes with an integrated hybrid inverter.
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The Panasonic EverVolt pairs well with solar panel systems, especially if your utility has reduced or removed net metering, introduced time-of-use rates, or instituted demand charges for residential electricity. Installing a storage solution like the EverVolt or EverVolt 2.0 with a solar energy system allows you to maintain a sustained power supply during both day and night, as long as you store enough power from your solar panels when the sun is shining.
As with many other home battery products, the EverVolt and EverVolt 2.0 are both sized for day-to-day use at your home and are primarily designed to accompany a 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 stored energy in your battery instead of buying it from your utility company.
The EverVolt and Evervolt 2.0 are specifically designed to pair with Panasonic''s premium HIT panels. With the HIT modules'' built-in Enphase microinverters, you can create a complete solar plus storage home setup, all under warranty by the same company.
There are a few key differences between Panasonic''s original EverVolt and the EverVolt 2.0. While we''ll go into more detail in the sections below, the following table summarizes these differences.
The EverVolt is one of a handful of batteries available in almost identical AC and DC versions. It can be just as easily installed alongside a new solar panel system as it can be added as a retrofit to an existing system.
When you''re evaluating the EverVolt and EverVolt 2.0, there are various important metrics and technical specifications to look out for. Among the most important are the size of the battery (power and capacity), its chemistry, depth of discharge, and roundtrip efficiency.
The original Panasonic EverVolt comes in four models: two AC coupled (EVAC-105-4 and EVAC-105-6) and two DC coupled (EVDC-105-4 and EVDC-105-6). The AC and DC coupled models are essentially the same as far as performance metrics, except for roundtrip efficiency. We''ll refer to them both by their designations as "Standard" and "Plus" to include both the AC and DC-coupled versions of the same batteries. The EverVolt 2.0 comes in two different models: EVHB-L6 and EVHB-L9.
Think of your battery like water running through a pipe. The usable 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 once but will burn through its available energy capacity faster.
A battery''s power determines what appliances you can run with it at the same time, 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. In contrast, batteries with a higher usable capacity can store more total energy and thus can run your appliances for longer periods 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 specific to rate arbitrage. The suite of EverVolt products is designed to provide both of these services. In addition, the EverVolt 2.0 offers many different functionalities, depending on what you need from your battery system. You can switch the operating mode of your EverVolt 2.0 from back-up to residential to time-of-use to a custom mode of your choice. Like many other battery companies, Panasonic provides a companion app for their energy products. With their EverVolt software and a solar plus storage system, you can view real-time energy usage and solar electricity generation.
While solar batteries are highly reliable and rarely require maintenance, some are easier to service than others. In general, modular batteries are easier for installers to service in the field – meaning you likely won''t have to ship the whole battery back to the manufacturer for maintenance. The EverVolt and Evervolt 2.0 are modular batteries, and Panasonic states explicitly that it''s designed for field serviceability, giving you peace of mind that your battery can be easily fixed if you experience any issues.
The EverVolt is a lithium nickel manganese cobalt oxide (NMC) battery, while the EverVolt 2.0 is a lithium iron phosphate (LFP) battery, also known as a lithium-ion storage product. LFP batteries are one of the most common lithium-ion battery technologies and for a good reason. LFP batteries are known for their high power rating and safety. To learn more about how different lithium-ion battery chemistries stack up against one another, check out our overview of battery chemistry differences.
If you''re hoping to install your solar battery outside, you''ll need to ensure it''s weatherproof and has an outdoor protection rating. While you can only install the original EverVolt indoors, the EverVolt 2.0 is weatherproof and outdoor-rated.
Inverters are necessary to convert electricity from direct current (DC), which is generated by solar panels and stored in solar batteries, to alternating current (AC), which is used by most household appliances. Storage systems can come with or without an integrated inverter – if your system doesn''t come with an integrated inverter, you''ll have to pair it with a separate, external inverter.
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 manufacturers specify a maximum DoD level for optimal battery performance. Generally, batteries with a higher depth of discharge are considered higher-quality products. The Panasonic EverVolt doesn''t list a depth of discharge on its spec sheet, but the EverVolt 2.0 boasts an impressive DoD of 100 percent.
Roundtrip efficiency is a measure of electrical losses involved with charging and discharging a particular battery. The higher the percentage, the more efficiently the battery can convert incoming electricity into stored electricity and back into usable electricity. Both the EverVolt and EverVolt 2.0 have a roundtrip efficiency of 90 percent; this means that for every 10 kilowatt-hours (kWh) of electricity, you put into the battery, you''ll receive 9 kWh of output.
Warranty period: 10 years
Guaranteed end-of-warranty capacity: 60%
Throughput warranty: 30.2 MWh for the Standard, 45.3 MWh for the Plus (7.56 MWh per battery module)
Warranty period: 10 years
Guaranteed end of warranty capacity: 60%
About Cost of residential battery storage
As the photovoltaic (PV) industry continues to evolve, advancements in Cost of residential battery storage have become critical to optimizing the utilization of renewable energy sources. From innovative battery technologies to intelligent energy management systems, these solutions are transforming the way we store and distribute solar-generated electricity.
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By interacting with our online customer service, you'll gain a deep understanding of the various Cost of residential battery storage featured in our extensive catalog, such as high-efficiency storage batteries and intelligent energy management systems, and how they work together to provide a stable and reliable power supply for your PV projects.
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