Similarly to diode battery isolators, FET isolators allow simultaneous charging of two or more batteries from one alternator (or a single output battery charger), without connecting the batteries together. This compensates for the voltage drop over the diodes in the isolator. All models are fitted with a compensation diode that can be used to slightly increase the output voltage of the alternator. The Argo battery isolators feature a low voltage drop thanks to the use of Schottky diodes: at low current the voltage drop is approximately 0.3V and at the rated output approximately 0.45V. Discharging the accessory battery for example will not result in also discharging the starter battery. Label recesses for circuit identificationĭiode battery isolators allow simultaneous charging of two or more batteries from one alternator, without connecting the batteries together.Silver alloy contacts provide high reliability for switching live loads.7/8' (22mm) stud length accepts multiple cable terminals.3/8'-16 tin-plated copper studs for maximum conductivity and corrosion resistance.LED output to remotely indicate when batteries are combined, isolated, in voltage lockout, or in Start or Engine isolation.Engine Isolation (EI)-can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output.Start Isolation (SI)-can be configured for temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics.Dual sensing-senses charge on both battery banks.Magnetic Latch (ML)-ACR draws very low current (500 Ampere continuous rating to support high-output alternators.

Allows paralleling of battery banks for emergency starting.Automatically manages the charging of two large battery banks.Isolates batteries during starting to protect sensitive electronics.Ĭombined wit a Dual Circuit Plus battery switch, an effective and low cost means of implementing a dual battery system is created.ĥ00 Ampere Bi-Stable Magnetic Latching Automatic Charging Relay automatically manages the charging of two large battery banks and offers optional manual override for emergency battery paralleling. SI-Series ACRġ20 amp SI-Series ACR automatically manages the charging of two battery banks and This protects sensitive electronics from voltage sags and spikes in the starting circuit. All Blue Sea Systems ACRs can be configured for Start Isolation, which provides temporary isolation of house loads from the engine circuit during engine cranking. In addition to the remote control switch, ML- Series ACRs are available with a local manual control knob to combine battery banks in an emergency. Blue Sea Systems ML- Series and SD-Series ACRs include a Remote Control Contura Switch so that ACR function can be controlled from a helm station or other convenient location. ML- Series ACRs have high amperage contacts rated for engine starting, and the SI- Series ACR momentarily opens the relay, isolating the two batteries during starting. Blue Sea Systems uses two methods to overcome this. This can occur when a charge source other than the alternator, such as a solar charger, has caused the ACR to close. ACRs can potentially be exposed to very high currents if the engine is cranked while the ACR has combined the batteries. Older style diode isolators may have an excessive voltage drop making them unsutable for battery charging. Special FET isolators have very low voltage drops and produce minimum heat. When there is no charge present, the ACR isolates the batteries.īattery Isolators are one-way electrical check valves that allow current to flow to, but not from, the battery. When a charge is being applied, the ACR combines the batteries. There are two main types of charge management devices used on boats:Īutomatic Charging Relays (or Voltage Sensitive Relays) use a relay combined with a circuit that senses when a charging source is being applied to either battery. If one battery becomes depleted, there will be a charged bank available for emergency starting. Charge management devices connect two battery banks when charging, and isolate them from each other when not charging. In a boat with two battery banks, it is useful to be able to charge both banks while underway.

60v battery isolator relay