Knowledge Centre What Amp DC-DC Charger do I require?
Q: What Amp DC-DC Charger do I require?
A: You want to prevent damaging the battery from a slow or fast charge so selecting the right size is important. If you have a wet lead-acid, AGM & GEL batteries, it is a general rule of thumb to rate the charger to deliver 10-20% of your battery's rated capacity (i.e. for a 100Ah battery, a 10-20A charger would be best suited). Lithium batteries can handle much higher charge currents and can therefore have reduced recharge times. You will find the charging current limit for a lithium battery on the manufacturer's datasheet.
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