FET battery isolator: charges 3 batteries from one alternator or charger, 200A maximum
Virtually no voltage loss: under 0.02V at low current, about 0.1V at higher currents
No need to raise the alternator output voltage
Batteries stay separate, so flattening the house battery won't flatten the start battery
Alternator energize input
For 12V and 24V systems
M8 bolt connections
Where to use it
Charging a start battery and two auxiliary batteries from one alternator or single-output charger in boats, trucks and motorhomes, without the voltage loss of a diode isolator.
Keep cables short and of a good cross section. For smart alternators or lithium batteries, a DC-DC charger such as the Alvolta Orbit or Victron Orion-Tr Smart is usually the better choice.