MK Battery 8G22NF-DEKA 58Ah, 12V Gel Deep Cycle Battery


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Product information

MK Battery specializes in VRLA sealed lead acid batteries; with 30 years of design experience and using the latest manufacturing technology, today their batteries are one of the best choices for solar and renewable energy systems. Sealed Gel and AGM batteries are the preferred choice for energy systems in remote locations with difficult access where power reliability is a priority. MK Battery is continuously rotating its inventory, ensuring that all the batteries shipped are fresh. The proper disposal of the returned batteries are facilitated through their multiple EPA permitted distribution centers across the US.

MK DEKA gel batteries are completely maintenance free. Sealed gel batteries do not require periodic watering and they can be installed without active ventilation since they do not produce corrosive acid fumes. The sealed construction prevents spills commonly seen around flooded battery banks, this also facilitates transportation without special containers.

The electrolyte in gel batteries is not in liquid form, eliminating the need for equalization and allowing for a faster recharge. DEKA gel batteries have extreme durability and respond better than flooded batteries in applications with heavy power demands. They have less than 2% stand loss per month allowing for longer periods of time in storage without deterioration.

MK gel batteries are constructed using Individual plate formation (IPF) ensuring voltage matching between the cells; the GEL Monobloc batteries have been tested to IEC-61427 standards.

Technical specifications for DEKA valve regulated gel battery 8G22NF-DEKA:
Nominal voltage: 12V
Capacity at 20hr: 51Ah
Capacity at 100hr: 58Ah

Dimensions and weight:
Length: 8.991in
Width: 5.47in
Height 9.26in (including terminal)
Weight: 37.5lbs

Complete list of MK Battery DEKA sealed gel batteries:

MK Part NumberTerminal TypeVoltage (V)Capacity C20 / C100 (Ah)Length (in)Width (in)Height (in)Weight (lbs)
8GU1-DEKAT8731231.6 / 367.715.187.2223.5
8GU1H-DEKAT8731231.6 / 368.315.187.2223.5
8G22NF-DEKAT8811251 / 588.995.479.2437.5
8G40-DEKAFT1240 / 487.766.626.8731.5
8G34-DEKAFT1260 / 7010.206.657.0538.5
8G24UT-DEKAUT1273.6 / 84.510.206.569.2451.5
8G24DT-DEKADT1273.6 / 84.510.906.569.3151.5
8G27-DEKAT8761288 / 9912.836.569.3062.0
8G27DT-DEKADT1288 / 9912.836.569.4562.0
8G31-DEKASTUD1297.6 / 10812.936.759.3468.5
8G30H-DEKAT8761297.6 / 10812.936.759.7668.5
8G31DT-DEKADT1297.6 / 10812.936.759.3468.5
8G5SHP-DEKAT87612115 / 12313.586.7711.4284.5
8G4D LTP IATALTP12183 / 21020.758.4410.82136.5
8G8D LTP IATALTP12225 / 26521.0311.0010.82166.5
8GGC2-DEKADT6180 / 19810.257.0910.8869.0
8GTE35-DEKASAE6195 / 2119.647.5110.6569.0

DEKA Gel Batteries Fundamentals
In a gel battery the oxygen produced by the positive plates recombines with the hydrogen released by the negative plate. This produces the water and moisture required for the next cycle, therefore, never needing additional water. The gel cell maintains a positive pressure generated by the sealing vents; without the pressure difference, it would be impossible for the oxygen to travel through the gel towards the negative plates and recombine with the hydrogen. Without the sealing vents the gel cell would be dry.

The valves also release any excess pressure created when the battery is over charged, preventing permanent damage. The cell should never be opened, any alteration will cause the cell to lose its pressure and ruin the balance required for the right chemistry.

One main advantage of gel batteries is that the cells are sealed and they do not spill corrosive electrolyte when they are tipped or the container is damaged. For that reason, flooded batteries are subject to more transportation regulations than gel batteries. Due to the structure of the gel cells, when they are idle, gel batteries present lower loses than wet batteries. They also have more tolerance to deep and extended cycles that could potentially damage the battery.

Like any other battery, repetitive overcharging or over-discharging cycling shortens the life of the battery; in some instances, it will cause irreparable damage. Overcharging is specially harmful to gel batteries, it drives the oxygen and hydrogen out of the cell, drying the gelled electrolyte. While our gel cell will accept a charge extremely well due to its low internal resistance, any battery will be damaged by continual under or overcharging. Capacity is reduced and life is shortened.

If a gel battery is continuously over-discharged, a layer of sulfate will cover the positive plate, preventing the flow of electrons and the proper recharging. It is very important to set the charge controller using the proper charging parameters. Please look at the attached technical bulletin.

About MK Battery - Deka
DEKA has an extensive number of distribution centers across the United States. It is operated by MK Battery and owned by East Penn Mfg. Co. Inc. MK Battery operates from their headquarters in Anaheim, California; it was founded in 1983 and currently has more than 100 employees. They specialize in deep-cycle and standby power applications and has become one of the largest suppliers of sealed lead acid batteries. Their batteries are made in the US with the highest environmental standards as well as quality. At Webo Solar we focus on deep cycle batteries for renewable energy systems, but it is worth mentioning that MK Battery also manufacture batteries for the health care, communications, biomedical, security, recreational and other industries.

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Charging Parameters

Technical bulletin with renewable energy charging parameters.

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MK Battery 8G22NF-DEKA

Specs for MK Battery 8G22NF-DEKA

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How to select the right battery

Selecting the right battery for your application

The first and most important step to configure your battery back is to know your system's voltage. Small systems used in RVs and boats are usually 12V. It is recommended to use 24V or 48V for medium sized energy systems and always 48V for large systems. Some systems can even go up to 60V, however, 12V, 24V and 48V are the standard in solar and renewable energy systems. Whatever your system voltage is, keep that number in mind since it will be consistent across your system design; changing your system voltage down the road could be a costly alternative.

Another factor is to know the space available for the batteries, this is especially true for mobile applications and systems with a designated battery enclosures. These type of enclosures are usually designed for a certain type and number of batteries, for example, four L-16 batteries.

Knowing the type of battery you want is also part of the selection process. You only want to use deep-cycle batteries in renewable energy systems. Lead acid batteries are the most common, they can be flooded or sealed. Flooded batteries require periodic maintenance such as refilling water levels while sealed or VRLA batteries are considered maintenance free. Flooded batteries are seen in most renewable energy systems mainly because of their lower cost. Applications in remote locations with difficult access call for sealed batteries that do not require constant human supervision. Both batteries, flooded and sealed, are comparable in terms of performance; the determining factors are the application and cost.

A factor that requires careful consideration is your energy needs which ultimately will determine the size of your battery bank. Technically speaking, the larger the battery bank, the better. A large battery bank will reduce the depth of discharge of each cycle, thus extending the life of the batteries. Realistically, not everybody has the budget for an oversized battery bank.

Once the above factors have been figured out, the rest is relatively easy. The number of batteries in the bank will be determined by the voltage, if you have a 48V system you will need eight 6V batteries or twelve 4V batteries.

Your energy requirements will determine the capacity, or the total amount of energy stored in the battery bank. It is usually measured in charge / discharge cycles. This part can get highly technical so we are going to simplify it for the purpose of this article. The capacity of your storage is measured in Ampere-Hour or Ah per cycle. To extend the life of the batteries it is recommended to discharge your batteries less than fifty percent per cycle (50% depth of discharge or DOD). So if you know that you need 350Ah to power all your loads on daily basis, you should consider a 700Ah battery bank for a healthy life cycle. In the same scenario, a 900-1000Ah battery bank won’t hurt, it will provide additional energy on the days when it is needed and will also help extend the life of the batteries by reducing the depth of discharge of each cycle. Needless to say it will also cost more money.

Note: As a rule of thumb, the larger the size of the battery bank, the lower the nominal voltage of each battery. For example, 12V batteries are only recommended in small systems with one or two batteries. 6V batteries are ideal for medium size banks and are widely used in renewable energy systems. 4V and 2V are high capacity batteries reserved for large energy systems.

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MK Battery 8G22NF-DEKA 58Ah, 12V Gel Deep Cycle Battery

MK Battery 8G22NF-DEKA 58Ah, 12V Gel Deep Cycle Battery

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