Loading batteries professional. As a guideline for determining the size of a charger, the rule has been for a long time: 10% of the installed battery capacity (eg 200 A/h battery requires 20amp charger). However, if the heating is used in the port or the laptop, refrigerator or the television is running, not much remains of the 20 amps charging current and the battery will barely charge.
Considering this perspective, the size should be about 20-25% of the battery capacity. The same applies to the size of the battery - "more is better". Add-on battery power gives you confidence and increased independence.
Through the use of ever larger current loads on board of modern yachts, it is necessary to devote the energy supply some attention. In harbors and marinas with very long supply lines and many connected consumers, it often is observed that on the last ridge, only a voltage of less than 200 V arrives at the last outlet.
For chargers with conventional transformer technology, the charging voltage/ load current breaks together and a reasonable charge is no longer guaranteed. When overvoltage the risk is, that the charging voltage exceeds 14.4 V or 14.8 V and damages the batteries. The switching power supply technology (switch mode) was introduced in recent years with current/ time and voltage control IUoUo charging technology, which allows a recharging of 100% of the batteries. In contrast to simple, non-230 V power supplies, these chargers are precisely controlled and regulated via an electronic control of the course of the loading phase.
The type of batteries (AGM, gel or acid), the charging voltage and the duration of the equalization charge can be adjusted in many chargers or calculated automatically. An important point is the temperature monitoring of the battery. This will protect your battery from excessive charging and prevents the escape of acid.
When sizing and design of the output of the charger, the following factors have to be considered: do not choose a charger too small!
In order to achieve fast charging of the batteries (in particular for AGM and gel), the charging current can be up to 30% of the battery capacity. Example: for a battery pack with 200 amp you should choose a 60 amp battery charger. Very often the 12 Volt power requirements at the port will be forgotten. On board, an energy requirement of 100-200 watts comes together quickly - these are 10-20 amp power that will be missing from the charger and then cannot be used for charging your batteries on board. For the correct determination of the charger the 12 V system consumption must be taken into account.
At SVB you can find the right solution for every application and our product range includes various chargers and batteries from popular brands.