MK Battery 8AU1H-DEKA 37Ah, 12V AGM 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.

Absorbed glass mat or AGM batteries are valve regulated (VRLA) and completely sealed. They 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. The positive plates in an AGM battery are surrounded by the glass mat which reduces the chances of damage caused by vibrations (mobile applications) and extended cycling. Due to their chemistry and constructions, AGM batteries perform better than flooded batteries in extremely cold environments. They are also preferred in high power and current intense applications.

MK / DEKA AGM batteries have a very efficient recombination process. They are produced under ISO 9001 quality controls and are UL certified. They are constructed using Individual plate formation (IPF®) ensuring voltage matching between the cells. DEKA AGM batteries are considered a non-spillable by ICAO/IATA/DOT facilitating transportation without special containers.

Technical specifications for DEKA valve regulated AGM battery 8AU1H-DEKA:
Nominal voltage: 12V
Capacity at 20hr: 32Ah
Capacity at 100hr: 37Ah

Dimensions and weight:
Length: 8.31in
Width: 5.18in
Height 7.22in (including terminal)
Weight: 23lbs

Complete list of MK Battery DEKA sealed AGM batteries:

MK Part NumberTerminal TypeVoltage (V)Capacity C20 / C100 (Ah)Length (in)Width (in)Height (in)Weight (lbs)
8AU1H-DEKAT8731232 / 378.315.137.2223.0
8A22NF-DEKAT8811255 / 639.725.479.2437.0
8A24UT-DEKAT8811279 / 9110.906.809.3152.0
8A24DT-DEKADT1279 / 9110.906.569.3152.0
8A27-DEKAT87612100 / 10612.836.569.3061.5
8A27DT-DEKADT12100 / 10612.836.569.3061.5
8A31DT-DEKADT12105 / 11012.936.759.3367.5
8A4DLTP-DEKALTP12198 / 21020.758.4410.82133.5
8A8DLTP-DEKALTP12245 / 25021.0311.0010.82163.0
8AGC2-DEKADT6190 / 22010.257.0910.8868.0

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 8AU1H-DEKA

Specs for MK Battery 8AU1H-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 8AU1H-DEKA 37Ah, 12V AGM Deep Cycle Battery

MK Battery 8AU1H-DEKA 37Ah, 12V AGM Deep Cycle Battery

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