Feb 14, 2019

Jon Margan
Jon Margan Manager of Canadian Energy Victoria, BC

You most likely operate your vessel with batteries that are rechargeable. Rechargeable batteries account for nearly half of worldwide battery sales. Within the rechargeable battery category, there are many different types of chemistries that are used. The most proven type of chemistry is the lead acid chemistry.

Wet cell or “flooded” batteries and Absorbed Glass Mat (AGM) batteries are both considered lead batteries and contain an electrolyte solution which causes a chemical reaction and produces electrons. These batteries are recharged when put in contact with a reverse current. But, given the way they are designed, they each have their own pros and cons and these variations should be considered before use.

Ready To Install AGM BatteriesAbsorbed Glass Mat (AGM)

An AGM (absorbed glass mat) battery contains a special glass mat separator that wicks the electrolyte solution between the battery plates. This material’s design enables the fiberglass to be saturated with electrolyte – and to store the electrolyte in a “dry” or suspended state rather than in free liquid form. As the battery works, electrolyte is transferred from the glass mat to battery plates as required.  The mat contains enough electrolyte for the battery to deliver its full capacity and – should the battery case become damaged or the battery is tipped on its side – its electrolyte will not spill.

Pros:

These batteries are referred to as maintenance free batteries, and do not require watering service. Since there is no free liquid and minimal gassing, AGM batteries can perform better than flooded batteries in applications where maintenance is difficult to perform.

Cons:

Users should take care when charging this battery as over and under charging can affect their life and performance. AGM batteries perform most reliably when their use is limited to the discharge of no more than 50% of battery capacity.

AGM starting and deep cycle batteries are slightly more expensive. These prices have come down in the last few years, but when it comes to starting batteries, we're seeing them more common and more available in the market today, The upside is they're considered non-hazardous material as they don't off-gas during normal charge and discharge operation so we don't have to take the same safety precautions as far as paperwork and handling are when we're dealing with AGM batteries


Batteries InstalledFlooded/Wet Cell Batteries


Possibly the most “traditional” type of battery, wet (or “flooded”) batteries most closely mimic the design of the original battery.  These batteries contain a combination of liquid electrolyte. The liquid in these batteries must be carefully measured and maintained in order for the battery to perform properly.


Pros:

Wet Cell batteries are typically the best choice for backup power applications, utility, and grid energy storage.

Cons:

Most of the cons of the flooded battery stem from the fact that they contain free liquid that Canadian Energy Victoria BCrequires periodic inspection and maintenance.  Flooded batteries can also be inadvertently damaged in forceful movement. Extreme climates can have a greater effect on the battery life due to the electrolyte solution inside the battery having the ability to evaporate or freeze.

While flooded batteries do require maintenance, if taken care of properly this battery type will last longer than many of their counterparts.

• Jon Morgan Mgr. Canadian Energy Victoria BC
https://www.cdnrg.com/

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