Articles: Batteries

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Father's Day Promotion

Your boat's electrical system can be overwhelming. If you are not sure where to start, or if you would like to learn more about your electrical systems, book an Electrical Audit with PYS

Do Lithium Iron Phosphate (LiFePO 4) Batteries Share Your Values?

Lithium Ion (LiFePO 4) battery technology is widely available and becoming a viable option for pleasure vessel owners. Do you value any of the following features offered by lithium battery technology?

Battery Charger Settings for Different Types of Batteries

At the Vancouver Boat Show this year we received a lot of questions about sizing a battery charger, the proper settings on a battery charger, and if you can use one charger to charge different battery chemistries, for example, flooded lead acid or AGM lead acid.

The Perils of Flooded Lead Battery Discharge Below 50% and Partial State of Charge

Depth of Discharge (DoD) is used to describe how deeply a battery has been discharged. Cycle life is the number of times a battery can be cycled to a certain point before the battery will reach the end of its usable life. There is a direct relationship between the DoD and the cycle life of a battery.

Battery Chargers

Any boat that is moored where there is shore power available will benefit by having a battery charger that converts AC power to DC power which can be stored in the batteries.

Charge Distribution

Quite often on boats there will be more than one battery bank that will be charged from a single source, as is very common with an alternator. There are several ways of distributing the power from the charging source to the various batteries allowing prioritization of current flow.

Battery Charging Rates

Slow and steady wins the race when it comes to battery charging. It is important to bring a flooded lead/acid battery to at least 14.4VDC to get the electrolyte circulating and avoid stratification. However, prolonged charging above 14.4VDC can lead to hydrolysis (cleaving of the water in the electrolyte into hydrogen and oxygen).

Negative Battery Switching Troubles

We recently had to trouble shoot a problem on a boat that had negative battery switching instead of positive. In North America, everything is switched (and fused) on the positive side of the battery. In Europe, some boats have both positive and negative battery switching (i.e. Beneteau) however, we have never seen a negative only battery switching before.

Battery Bank Sizing

There are a lot of factors that go into determining the appropriate sized battery bank for a boat, and no hard and fast criteria. However, there are some general guidelines that can help in setting up a bank of batteries that will provide enough power for the DC systems on board without sinking the boat or your finances.

Engine Starter Circuit

A common calamity for which we often get requests for a service call is the engine failing to start or even “turn over”.

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