The standard diode battery splitter causes a voltage drop of about 0.6volts regardless of the current passing through it. However, the batteries need a voltage between 14.4 and 15 volts to be charged correctly. If a splitter is interposed between the standard alternator that delivers 14.2volts it is insufficient for recharging batteries with 13.6volts. To remedy this we offer electronic distributors without voltage drop. If you are seeking optimum charging go for these models. A load balancer is given for a maximum current, it must be chosen accordingly. For example a 70A alternator must accept, at least this current.