In 1600, when William Gilbert, an English physicist, made an extensive study of electricity and magnetism, separating static electricity from the lodestone effect, electricity was transformed from an abstract curiosity into thorough research.

2 What is a solar Battery 

In this article, we will talk about an important matter related to solar batteries and the date of manufacture.
The date of manufacture is very important and is something that the buyer must know if the matter is related to the batteries. As for whether the matter is related to the solar panel or the inverter, it does not matter.

The solar battery, like other batteries, is affected by time, and here we mean the ampere in addition to the battery, affected by the subject of storage, which must have certain conditions such as temperature and many who face a problem when he buys the battery, he is surprised after a while that the battery is over And she was out of service.

The question then is, does the solar battery have a certain expiration date like other products such as food, and how long is the battery life?.
The answer, of course, is yes, the battery has an expiration date that must be taken into consideration before purchasing the battery and for a limited life.

You must know that the solar battery must have a production date of no more than a year, and the battery cannot be stored for more than The reason is chemical reactions that occur inside the solar battery even if it is in the storage period.
The problem with the battery is self-storage. When you buy a battery that has a large stored period, you find that it has completely discharged and is practically empty.

The expiry date will have expired, so you should pay attention to this matter, which is the date the battery was produced before you buy it.

One of the main reasons for battery damage is the expiration date (production date) and there are other reasons that we will talk about later.

4 How to know the date of manufacture? 

                    

NUMBER is the last digit of the year.

 

Example:

 

• A battery with “G5” on the negative.
• “G4” means that it was shipped around July of 2015.

Where can you find this code?

Trojan always puts the date on the negative electrode of the battery, above the electrode, not specifically on the top of the battery. So when you look at the negative electrode, you find the code written with a letter and a number as shown in the picture

 

Varta batteries

 

For German Varta batteries, two numbers are written on the negative electrode, one from the top and the other from the bottom. The number from the top represents the week, as shown in the picture. The bottom represents the year.

4. Batteries are the heart of an Off-grid system 

Not All solar systems requires batteries, if your system is an on-grid system you don t need to store your energy because you can use it directly and you can bank the restof energy produced in the grid,but connecting to the grid is not viable you have to invest for solar batteris .

that s where batteries come in.

6. Key terms of solar batteries.

Here are some key terms you should understand when you picking up your batteries .

Capacity: The amount of energy the battery can store and supply to the appliances.( rate of discharge,function of voltage, and amp-hours)

Battery Bank : a group of batteries , wired together to work with a solar charge controller at a voltage (12v,24,48) and capacity (200 amp hours )

Voltage: Solar batteries are rated by voltage.

Lithium solar batteries for off-grid solar systems come in either 12V,24V,48Vols configurations.

• Small systems : 12 volts batteries 
• Larg systems ; 6 or 2 volts solar batteries for high amp-hour capacity.

Amp-hour: Solar batteries are rated in amp-hours (Ah) which means how much current they output over time.and this key is used to compare lead-acid capacity.

Kilowatt Hour (KWH) : This used to quantify  the total capacity for a given bank based on voltage and amper hour.

Capacity (WH) = Voltage * Amp hour

Example : 12V*200Ah=2400 Wh = 2.4KWH

Cycle: When the solar battery got charged and discharged this one cycle. the life time of a battery (is not the time given by the manfufacture (forexample a 4 years waranty)) but in the number of times a battery charge and discharg over the course of it s  lifspan .

Depth of charge (DOD): the amount of energy  pulled out of a battery during each charge/discharge cycle. 

for example a battery of 75% depth of discharge means you can  use 75 % of it s capacity before recharging .

Efficiency: Solar batteries are not 100% efficient but power is lost in the charge and discharge process.

• Lead-acid batteries are 80-85% efficiency
• Lithium Batteries are 95-98 % efficiency 

7. SIZING BATTERY BANKS

Sizing a Battery Bank properly for your system is a crucial ,what  you need not know is how much power you use on a daily basis( how many Wh or kWh per day  ) .so the battery bank depends on the quantity of  power you have to store .

Depth discharge , efficiency are also  factors you have to make an eye on when after accounting the capacity of your batteries . accounting the battery capacity helps the customer to save costs because if you don t know how much power u use per day make you installing more batteries while you are enough .

• Adding old batteries ( led acid batteries ) to new one when you decide to expand your battery is not good idea , this work leads to aging your new ones ,you will notice this after the first year .

8. Calculate Battery Capacity 

 

 

Top Reviews 

 

Panasonic- Japanese company 

• Varta – German company 

 

 

 

 

Neptune Power Batteries

 

Neptune Power Replacement Batteries meet and even exceed manufacturers specifications, Superior Design, High Quality, long-lasting working life 3-5 Floating time range, High-Quality ABS material Fire Resistant, The Latest Technology grid design and paste formulation, AGM high standard separators.

Every Battery shipment is tested to Guarantee Hi-Performance & Longevity. Our Batteries Feature high discharge design, wide operating temperature range, and long expected service life.

Neptune NT12180 12Volts 18 Amp replacement battery feature Valve-Regulated Lead Acid (VRLA) SLA Sealed Lead Acid Battery Technology, making them safe to operate in any position, near people and sensitive equipment.

Manufactured under Japanese Quality standard, Environment Certificated Plant and facilities with:

• ISO 9001 for Quality Management Systems.
• ISO 14001 Environment Management System (EMS).
• Health and 14001 Safety Environment Standards certification.
• Under UL (Underwriters Laboratories) certifying Quality and manufacturing processes.

Install your new NT-12180 Batteries in your device using the same original configurations and existing cables and connectors. Please check your battery for dimensions and Terminals prior to ordering as manufacturers may change requirements without notice.

Beware Of SLA Batteries Without UL, UR, CE & ISO Symbols To Guarantee Quality & Genuine Specification Certifications. All Neptune batteries Are Manufactured In our Certified ISO Factories To Our Specifications.

• Quite impressed!

TD
Excellent battery, excellent value. Hooked up to my 160 watt panel (30 amp charger) and works perfect. Just bought a second one. Have a 2000 watt inverter and can run a 700 watt microwave for camping with no effort.