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Checking the health of solar batter can also be described as the state of health (SoH) of a solar battery can be said to be the condition of a battery, compared to its ideal condition at the time of purchase.the unit for the state of health (SoH) is measured in percentage. Typically, a battery’s (SoH) should be 100% at the time of purchase and its expected to decrease over time and usage

Lots of questions have been asked about what health of the solar battery is all about, these questions include:
how do I test the health of my solar battery?
What is the life expectancy of a solar battery?
What is the best brand when choosing a solar battery for your home?
how long should a good solar battery last before discharge?

how do I test the health of my solar battery?

Well maintained solar battery can last for a long time if you keep in mind a couple of maintenance instructions. below is a summary of step by step methods to check the health of your solar battery. but first, make sure you observe the safety rules by wearing safety hand gloves, eye-protective devices and taking the battery out to a well-ventilated environment.

Simple steps to check the health of your solar battery

Using a high-quality battery hydrometer, though some hygrometer is made from plastic and have a float with various specific gravity and/or state of charge readings shown on them.
1) Remove the battery vent caps according to the manufacturer’s recommendations.
2) Insert the hydrometer into one of the battery’s cells and draw in some electrolyte, then inject it back into the cell to mix the electrolyte so you can get a good reading.

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3) Draw in electrolyte again and allow a few seconds for the float to settle so that it can give a stable reading.
4) Write down the reading indicated on the hydrometer float. Readings should be corrected for temperature using the following correction factors:
a) Add 0.004 for each 10°F above 80°F; add 0.005 for each 7°C above 27°C
b) Subtract 0.004 for each 10°F below 80°F; subtract 0.005 for each 7°C below 27°C
c) Some hydrometers automatically correct for temperature and do not require correction.
5) Repeat the procedure on each of the batteries and write down the readings.
6) Incase an electrolyte has dripped or spilled onto the battery, carefully wipe with a paper towel.
7) Return the vent caps onto the battery.
8) Check the manufacturer’s specifications on the particular battery you’re using to determine the fully charged specific gravity reading.

The manufacturer’s specifications for battery open-circuit voltage (OCV) vs state of charge (SOC) are listed by battery voltage and also show specific gravity (SG) vs state of charge. This information can be seen on the manufacturer’s manual found inside the battery carton.

What is the life expectancy of a healthy solar battery?

The life expectancy of a healthy solar battery is directly dependent on its usage cycles, which is the number of times a battery goes through a full charge and discharge. There are different factors that affect the lifespan of a solar battery, also their life expectancy depends on the type of battery and some factors which affect them which includes:
The Cyclic Life
The lifespan of a healthy solar battery can easily be checked through its cyclic life or the number of use cycles it has. For example, a lead-acid battery that is flooded is expected to provide 300 to 700 cycles and Lithium batteries are capable of offering 2000 cycles.

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Depth of Discharge (DoD)
The depth of discharge refers to the extent to which a solar battery can be used relatively to its total capacity. Batteries go down as they are discharged or charged. This, therefore, lowers their ability to store more energy. A battery that comes alongside a nominal capacity of 100 kWh at 60 % DoD will have a remaining charge of 40 kWh

The location of your battery is another critical factor in determining how long it lasts. A battery attains higher chemical activity when kept under high temperatures. This makes the solar batteries less efficient in colder climates. However, the cyclic life of a battery decreases with the increase in temperature.
The application also affects the lifespan of a solar battery. When a battery is used wrongly it affects its performance and lifespan too. Also when a battery is not properly maintained it affects its lifespan as well.

what is the best brand when choosing a solar battery for your home?

Before choosing the best brand for your solar battery, there are some factors to be considered such as: how much power does my home consume, how long am I going to use it per day. What are the available battery in the market? How much they cost and how long do each of these battery last.here are a list of the available batteries in the market:

lead-acid battery:
ead-acid batteries remain the best solar battery that has been used in off-grid energy systems for years. Healthy lead-acid batteries have a short life and lower DoD than other battery types, they are also one of the least expensive options currently on the market and also the best in terms of home energy.

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lead-acid battery
Healthy lead-acid batteries have a short life and lower DoD

lithium-ion battery:
The majority of new home energy storage technologies, such as the, use of some form of lithium-ion chemical composition. The energy density of lithium-ion is typically twice that of the standard nickel-cadmium. They also have a higher DoD and longer lifespan when compared to lead-acid batteries. However, lithium-ion batteries are more expensive than their lead-acid counterparts. lithium-ion battery causes little harm when disposed of.

lithium-ion battery
lithium-ion battery causes little harm when disposed of.

Salt-water battery:
The new salt-water technology makes energy storage safe and sustainable. Very high cycle life at 100% depth of discharge makes this ideal for long-duration solar applications. This non-toxic off-grid solar battery that can last a household over 10 years and can handle up to 3,000 full cycles, or 3,000 days and nights. They are also non-flammable, non-hazardous, and non-explosive. Considering this option for your solar battery is more than a good idea.

Salt-water battery
salt water battery are also non-flammable, non-hazardous, and non-explosive

How long should a good solar battery last before discharge?

The question of how long a solar battery lasts is directly related to its usage hours and discharge rate. for instance, Two houses A & B with a solar battery which produces 100killowatts of electricity respectively. House A consumes 20kw/h and House B consumes 10kw/h, house A solar battery will only last for (5)days while house B solar battery will last for (10)days. Thus, how long a solar battery should last depends on the rate at which it’s used. for more info on how to install solar power and price for your solar installation . check EnergySage

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