What is the Best Marine Battery for Solar

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A reliable Marine Battery is one of the most important parts of your boat. They need to be ready to work at a moment’s notice and if needed get you to a place of safety. One of the worst marine experiences is to be stuck with a dead battery if a difficult situation arises.A Marine Battery fall under Lead Acid Batteries which come in various options and they all have a different use. For sheer power to get your engine started you need one that has a high Cold Cranking Power such as a starting battery. If you need one to run various electronics then you would need a deep cycle battery. A marine battery is a hybrid battery that falls between the two:

Choosing a battery for Solar

There are 3 main types of to choose from so it is important to get it right.


Deep Cycle Batteries are designed to supply a constant and steady supply of 12v electric. The design allows them to run for a long time until they are completely exhausted and need to be recharged. A deep cycle battery isn’t designed to start an engine as it doesn’t have the burst of power needed. Some boats are fitted with a deep cycle and a Starting Battery so you need to ensure what is the purpose of the battery you are replacing.

Engine starter batteries need to provide a lot of ‘oomph’ for a very short time. Once the starter motor has done its job and the engine fires up, the alternator very quickly replaces the flood of amps drawn from the battery.

But if the engine doesn’t start, and desperation with the starter button sets in, then the battery will very quickly be drained of its precious amps.

A deep cycle marine battery operates rather differently. Instead of providing a great surge of power over a short space of time, these types eke out their power more conservatively over a longer period of time and are thus the way to go for providing the sustained loads of our 12v domestic systems.

Instead of the multiple thin plates of the starter battery, those of the deep cycle marine battery are thicker and there are fewer of them. They’re altogether more robust, and won’t buckle and fail anything like so readily.

Now there’s much less surface area to react with the electrolyte, so current release will be slower – ideal for the steady draw of our boats’ domestic system. The downside is that they’re incapable of providing the quick surge of power required to spin over a high compression diesel engine effectively.

STARTING BATTERIES are designed to just supply that burst of power to get your engines running. They produce a large amount of Cold Cranking Amps (CCA) at high power. A starting battery isn’t suitable to be used as a deep cycle battery or on a trolling motor. They have one job and that is to supply as much initial power as possible when starting your engines.

This type of battery has a relatively large number of thin plates presenting a maximum surface area to the electrolyte, which enables them to release a high current to our boat engine’s starter motor.

If a battery of this type is repeatedly discharged to about 50% of its capacity (12.2V) – say by the sustained loads of our boat’s domestic system – then it will very soon die and refuse any kind of resuscitation.

Marine Batteries for Solar

When purchasing batteries for solar look for a long lasting battery that can withstand a lot of charges for a good price. I personally find that batteries need to be replaced every few years whether you use them or not. Often times people neglect their batteries and even though they spent a ton of money on on high dollar batteries they still last just a s long as a cheap batteries because they failed to maintain them. My philosophy on batteries is buy a good mid range battery and maintain it well. With good care you will get just as much as much life as an expensive battery that is neglected.

There are a lot of brands out there that make a good battery. Honestly, a lot of batteries are made by the same manufacturers with just a new label slapped on them. So you’ll find many duplicates out there that perform the same.

VMaxTank Deep Cycle Batteries

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Weize 12V 100AH Trolling Motor Battery

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VMaxTank batteries have awesome mounting hardware, have great battery life being ran on a trolling motor, and work great for starting fishing boats when they are ran in pairs. I currently have them in both my Jetcraft and my aluminum fishing boat. The price is right and the delivery is easy so I have no compliants.

Qualities of a Good Marine battery

A Marine Battery is going to vary a lot between brands and quality. With so many variations there can be a difference in quality which is something you should never compromise on.

Cold Cranking Amps (CCA)

Cold cranking amps (shortened to CCA) is a measure of battery’s starting power. As a metric, it measures some amps a battery can deliver in 30 seconds at a temperature of 0°F. A battery with a large CCA rating is powerful and capable of starting almost any normal engine.

In addition to CCA, some batteries are rated in marine cranking amps (MCA). This is a measure of a battery’s starting power at 32*F.

There’s no “perfect” CCA rating for a battery. However, it’s always important to choose a battery that exceeds the recommended starting power for your engine. Most batteries with a CCA rating of 700 or more can comfortably start almost any small to a mid-sized outboard motor.

Maintenance and Design

Older lead acid batteries require maintenance, making them a nuisance to own. New batteries that use AGM (absorbent glass mat) technology require zero maintenance, making them much easier to own and use.

AGM batteries also tend to be leak proof, making them safe to mount in positions that damage conventional batteries. Some high-end batteries are even designed with a watertight seal that allows the batteries to continue operating even if splashed with water.

Reserve Capacity

 A battery’s reserve capacity is the amount of time required for a fully charged marine battery to drop below 10.5 volts while discharging 25 amps. Like CCA, reserve capacity is often shortened to RC and is measured at the exact temperature of 80°F.

The higher a battery’s reserve capacity, the longer it’s capable of performing. If you have large electrical demands and need to power a lot of equipment, it’s important to choose a battery with a large enough reserve capacity to match or exceed your needs

The higher a battery’s reserve capacity, the longer it’s capable of performing. If you have large electrical demands and need to power a lot of equipment, it’s important to choose a battery with a large enough reserve capacity to match or exceed your needs

Date of Manufacture

Over time, batteries gradually begin to lose their effectiveness and stop being able to maintain a charge as effectively as they once could. Even if it’s completely new and unused, a battery that’s one year old won’t perform as well as one that was just delivered from the factory.