How to choose home solar lithium battery?

Views: 889     Author: Site Editor     Publish Time: 2022-04-14      Origin: Site


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Home solar batteries are undergoing a revolution and more and more lithium battery manufacturers are entering the field, which means that there are a very large number of lithium-ion solar batteries on the market for you to choose from, and if you want to increase your PV for your own use, then home lithium batteries must be one of the indispensable modules.

Lithium solar batteries are power sotorage devices that allow you to accumulate the energy produced by your solar panels when you are not consuming it. They create a "solar backup power supply" that you can draw on in those moments when your photovoltaic installation is not producing enough (for example, on cloudy days) or simply when there is no sunlight. Therefore, the use of lithium solar batteries allows you to achieve greater savings on your electricity bill.

Home solar lithium battery

Although lithium solar battery are the most expensive type of battery on the market, they offer great advantages over conventional batteries, such as: greater storage capacity; high energy density, which reduces the weight and size of the battery, so they are smaller and lighter; and a longer service life. They support deep discharge and can utilize maximum capacity; have a longer shelf life; very low self-discharge, 3% per month. They require no maintenance; there is no discharge memory effect. They do not emit polluting gases; they are safer and more reliable.

At BSLBATT, we have over 18 years of experience as a professional lithium-ion battery manufacturer, including R&d and OEM services. And last year we sold more than 8MWh of Li-ion solar batteries for home use. We want to share this experience with you so that you have the necessary information to make the best choice when purchasing lithium ion solar batteries. If you would like to learn more, you can refer to the Home Battery Purchase Tips, or contact us directly.

In this article, we have provided you with a series of key questions that we hope you can consider when choosing to purchase a lithium-ion solar battery for your home.

What you Should Know When Choose A Home Solar Lithium Battery?

Lithium solar batteries are not simple building blocks, he are very complex Electrochemical components, however, the technical details and relationships can sometimes be difficult to understand - especially if you are not particularly tech-savvy, let alone well versed in the field of physics and chemistry. To help you find your way through the jungle of technical jargon, we've listed some basic features of lithium solar batteries that you need to consider.

C-rate Power Factor

The C-rate reflects the discharge capacity and maximum charge capacity of the home backup battery. In other words, it indicates how quickly a home battery can be discharged and recharged relative to its capacity. a factor of 1C means that a lithium solar battery can be fully charged or discharged in less than an hour. A lower C-rate represents a longer duration. If the C factor is greater than 1, a lithium solar battery will take less than an hour. With this information, you can compare home battery solar systems and reliably plan for peak loads. BSLBATT can offer both 0.5/1C options.

Battery Capacity

Measured in kWh (kilowatt hours), it is simply the amount of electricity the device can store. You find solar lithium battery packs for home energy storage on the product page of BSLBATT, we have individual packs from 2.5 to 20 kWh. Note that most batteries are scalable; that is, you can expand your storage capacity as your energy needs increase.

Battery Power

This refers to the amount of electricity it can provide at any given time and is measured in kW (kilowatts). It is important to differentiate between capacity (kWh) and power (kW). The former refers to the amount of energy that you can accumulate and, therefore, to the hours that you will be able to have electricity when your solar panels are not producing. The second indicates the number of electrical appliances that can be connected at the same time, according to their power. Hence, if you have a high-powered but low-capacity battery, it will discharge faster.

Battery DOD

This value describes the depth of discharge (also called the degree of discharge) of your home lithium battery. Lithium batteries usually have between 80% and 100% depth of discharge compared to lead-acid batteries, for example, which are usually between 50% and 70%. This means that if you have a 10 kWh battery you will be able to use between 8 and 10 kWh of electricity. A DoD value of 100 % means that the lithium solar home battery pack is completely empty. On the other hand, 0 % means that the lithium solar battery is full.

Battery Efficiency

In the process of transforming and storing energy in your lithium battery, a series of useful energy losses occur when charging and discharging the device. The lower the losses, the higher the efficiency of your battery. Lithium batteries typically have between 90% and 97% efficiency, which reduces the percentage of losses to between 10% and 3%.

Size and Weight

Although the weight and size of lithium batteries are much smaller than lead-acid batteries, but you also need to give them enough space for installation, especially the larger the capacity, the size and weight of the face will also increase, which requires you to consider which type of battery to choose for installation, whether to choose a stacked battery pack, or choose solar wall battery for wall mounting, of course, you can also choose for series battery Storage cabinets for modules.

Lithium Battery Life

Lithium batteries, especially lithium iron phosphate batteries, the most significant feature is to have a long service life. The lifetime of a battery is measured in cycles that include three phases: discharge, recharge and standby. Hence, the more cycles a battery offers, the longer its life will be. But now more and more battery manufacturers will falsely advertise their cycle life, leading consumers to make the wrong choice, so try to get their solar lithium battery cycle life test chart, in order to more accurately determine the true life of the battery.

Note: BSLBATT has been professionally tested and found that LiFePo4 loses approximately 3% of its capacity per 500 cycles.

Compatibility with inverters

A fundamental element to remember when choosing your lithium battery is that not all of them are compatible with all solar inverters. So, when you go for a certain brand of inverter, to a certain extent, you are also tying yourself to some specific battery brands. BSLBATT home lithium batteries are currently available for use with Victron, Studer, SMA, Growatt, Goodwe, Deye, LuxPower and many other inverters.

Consider the Usage

Perhaps many people assume that a longer cycle life and use use is the right solar lithium battery for them, but this is not an absolute argument. If you intend to buy home lithium batteries to improve the utilization of photovoltaic solar panels, and solar energy as your main source of electricity, then you need to buy longer life lithium battery pack, so as to achieve a state of near off-grid living; on the contrary, if you only need to use solar lithium batteries as a home uninterrupted power supply, only in special circumstances such as large-scale power outages on the grid, or the impact of natural disasters severe time to use, if this is your case, you can bet on one with less cycles, which will be cheaper.

Choosing A Low-voltage (LV) or High-voltage (HV) Battery

Home lithium batteries can be classified according to their voltage, so we distinguish between low-voltage (LV) and high-voltage (HV) batteries. High-voltage batteries guarantee higher conversion efficiency and increase your grid independence, allowing more flexibility to meet your energy needs now or in the future, with a larger voltage range and three-phase connection. Low voltage systems have higher current strength than high voltage battery systems, and because of the lower voltage, these systems tend to be safer to use and more easily scalable.

Learn about BSLBATT's high-voltage battery system with backup hybrid inverter: High-Voltage Battery System BSL-BOX-HV

Learn about BSLBATT's low-voltage home lithium batteries compatible with other inverter brands: BSLBATT Lithium Emerges as Stealth Winner for Home Batteries

If you need more information about solar lithium batteries, please contact us. At BSLBATT, we are experts in the manufacture of lithium batteries for energy storage; we are with you every step of the way: from initial research, design and manufacturing. Show us your latest ideas for solar lithium batteries and we'll be happy to help you.