Low voltage regulators have a max charging voltage of 13,8 V instead of the usual 14,5 V. There are cases, where the lower charge voltage is advisable: e.g. when the battery sits in or in close proximity of the oil tank. Especially Softails or classic bikes with 6 V to 12 V conversion tend to overheat the battery in their horseshoe oil tanks. Also, when using a modern lithium ion battery, the maximum charging voltage is 14,6 V. The stock regulator cut off voltage sits right on this limit. Thus using a low voltage regulator positively avoids damage to the battery. If you are unsure about which regulator type to choose, contact our service team, they'll be happy to sort you out.