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battery storage for solar systems


Using battery storage for solar systems, like any other kind of battery, will simply hold energy. You’ll have a supply of green energy on hand whenever your home needs it thanks to the fact that you stored solar energy within a solar battery. When your solar panel system isn’t able to produce as much power at night and evening, home battery storage comes in handy. The benefits of residence battery storage are self-evident, but which type of solar battery is appropriate is an important issue.

Battery Lifecycle

The life cycle of a battery is the number of times that it can be completely recharged and depleted. A solar battery, like a phone or computer battery, can only be fully recharged and emptied a specific number of times before it reaches its end. As a result, the larger amount of lifecycles a solar battery can complete is beneficial! Because Solar Panels typically last 15 years, you’ll want an energy storage system that can keep up with them. Many solar battery manufacturers provide warranties that guarantee performance for a set period after a specified amount of cycles.

Depth of Discharge (DOD)

The maximum proportion of a battery’s capacity that can be used without being recharged is referred to as its depth of discharge. Although a battery may claim to have a capacity, you will never be able to utilize it completely. This is due to the fact that fully discharging a battery may damage the cell itself. The Depth of Discharge is there for your convenience, informing you how much of the battery’s total capacity you can trustingly utilize. Some 6.5kWh batteries, for example, have an 94.5% depth of discharge.’ This implies that while the battery has a capacity of 6.5kWh, only 6.14kWh can be utilized before recharging, otherwise the battery will be destroyed. As a result, on the 6.5kWh specifications, the usable capacity is shown as being only 6kWh.

To summarize, the greater the depth of discharge, the more of your battery storage you may utilize on a daily basis.

Charging & Discharging Current

A battery’s charging rate is the speed at which it charges or discharges in Amps. The charge/discharge rate is determined by dividing the battery’s capacity by the number of hours it takes to charge and discharge.

Low-voltage batteries with a 3kW discharge/charge rate are the most frequent among UK and EU homes. Solar batteries with a 5kw charge/discharge are uncommon in houses. A charge/discharge rate of 7kW or higher implies that your solar battery can cope with greater base loads and surges.

The Technology

Many solar batteries, like the technology found in your electric cars, tablets and phones, are based on lithium-ion chemistry. Lithium-ion batteries are recognized for their low cost of ownership and greater efficiency. They’re seen as the battery of the future because to their low lifetime cost and improved efficiency. Lithium ion phosphate (LiFePO4) is the most up-to-date lithium ion technology used in solar batteries (LFP). LiFePO4 batteries have a longer lifespan than lead acid batteries and other lithium cells. They are lightweight yet extremely safe owing to their improved discharge and charge efficacy.

Although lead acid batteries have a lower upfront cost than lithium-ion batteries, they are still popular among individuals seeking to go off-grid.

AC Vs DC Battery systems

The primary difference between a DC and an AC installation system is that the latter links solar panels to a solar battery or energy storage system using alternating current (AC), rather than direct current (DC). The journey taken by electricity in an AC-coupled versus a DC-coupled battery system is the key distinction. A DC battery system converts more sunlight into electricity because it directly connects your PV system to the solar panels. An AC-coupled method, on the other hand, connects your solar panels directly to an inverter. As a result, any power stored in a battery system is inverted three times.

Powercut Supply

Not all solar batteries are created equal, according to popular belief. During a power outage, your solar panels and battery connect directly to the main grid, so your solar inverter will switch off your system automatically. This is because it is safer for engineers to work on the grid if your solar battery has back-up storage functions. If you have back-up storage capacity in your solar battery, you may still receive energy.


Solar batteries with backup capability include an auto transfer relay switch. When your solar panel system detects a drop in grid voltage, your house will automatically be disconnected from the grid. Instead of connecting to the grid, you may use your solar backup supply. This is referred to as islanding. Islanding depends on a hybrid solar solution that offers an Emergency Power Supply (EPS). An EPS is intended to power essential circuits during a power outage and is typically extra. The batteries will still charge when there is no grid supply because to a hybrid solution with EPS.

In summary

We hope that this information has gone some way into helping you to understand solar power batteries and their usage somewhat. If however, you would like to find out more or have any concerns then please do contact us and we will only be too glad to help.

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