Both batteries will then be charged at the same time by the generator.
SMART BATTERY ISOLATOR WIRING GENERATOR
The generator output of course will rise to more or less 14.5 volts. Once the battery voltage reaches 13.3 volts the relay will close and parallel both batteries. Once the generator starts feeding voltage to the battery the battery voltage will rise. After starting the motor the battery voltage will be slightly less than 12.7 volts. Before start it will be approximately 12.7 volts if it is fully charged. Literature says that it is 13.3 volts for the C100 combiner. It will not parallel two batteries unless and until one of them has risen to the set point voltage of the relay. Interesting device, but with what they say on the web site "connects two batteries together when either is receiving a charge", I am not sure it would wait for the 1st battery to be charged up before connecting them together unless the voltage was so low while charging the 1st one It is a voltage sensitive relay. The Combiner 100 will be more than capable of supporting any Yamaha outboard motors electrical generation system. You can run the second battery to depletion without having to worry about the starting battery being charged and able to start the main motor. Turn off the motor and the batteries are electrically separated from each other. Any time the main motor is running it will recharge the starting battery first and as soon as the starting battery is recharged it will start charging the second battery as well. The Yandina of course will be connected between the two batteries. Connect the second battery to everything else in the boat.
SMART BATTERY ISOLATOR WIRING INSTALL
Easier to install IMO and as I mentioned, just as effective.Ĭonnect just the main motor to the starting battery. Cheaper than buying the Blue Seas System.
The Yandina combiner by the way is cheaper than buying just the Yamaha isolator lead. Of course the two batteries will have to have a common ground connection. One terminal for each positive post and one terminal for a negative post. It comes complete with terminals that are simply connected to two batteries. What will work just as well is a Yandina battery combiner. Unfortunately, the F90 does not offer this feature. Yamaha refers to their second battery isolator as a "multi charge monitoring system". It costs less than the Yamaha isolator lead and is a hell of a lot easier to install. One wire to the positive post of the start battery, one wire to the positive post of the house battery and one wire to the negative wire of either battery. I have used and can recommend the Yandina combiner. Stop the motor and the device disconnects the start battery from the other battery(s). When ever the engine is producing certain voltage the device will automatically parallel two or more batteries so that each will be charge while the motor is running.
The isolator device for the most part has been replaced by a device known as an automatic charge relay (ACR), voltage sensitive relay (VSR) or combiner. Plus, you don't have to install and route another cable from the motor to the battery. The problem with the Yamaha isolator lead is that in a number of cases it can cost more than a different component which offers the same benefit. When starting with 12 ~ 14 volts it is not desireable to lose any voltage as this will slow down the current flow. The electronic device known as an isolator has an inherent deficiency insofar as it uses diodes which result in voltage drop. You will need to add at least one to the Yamaha isolator lead for an SX motor.
Early Yamaha isolator leads do not have circuit protection (fuse or circuit breaker). I thought you might have been talking about that lead. Yamaha uses the term isolator lead to get current to a second battery. The benefit is to guard against a weak or dead battery from draining the charge of a strong battery in a muti-branch configuration.I just wanted to make sure that I understood what you were wanting to do. A isolator is a electrical device that divides direct current (DC) into multiple branches and only allows current to flow in one direction in each branch.
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