- I have a cyrix CT 120A relay between the starter battery and the service battery which is a victronenergy agm deep cycle 110 ah.
- Obviously the cyrix does a start with the batteries in parallel most of the time, that is, if the batteries are in solar charge or if the batteries are fully charged.
- In your opinion is it harmful to the agm victronenergy?
- I believe it is absolutely not harmful, as during start-up, the smartshuunt only marks 30A of absorption on the agm for less than 1 second.
- I think This is because the resistance of the positive cable in series between the batteries and starter motor means that 80% of the starting power is supplied by the starter battery.In fact starter battery have a much more short and more thick cable, that cause a lot less drop voltage and supply more amps to the motor. But some peaple say me that's is no good....
- In fact, the total absorption for starting is about 120A and are divided as follows: 30A on the agm services and 90A on the starter battery.
- Furthermore, the data sheet of the agm victron says that it tolerates inrush currents of 500 CCA at - 18 degrees, and absorption of 880 amperes for 5 seconds.
- So 30 amps 2/3 times a day for less than 1 second shouldn't hurt.
- What do you think?
- However, I have equipped the cyrix with a switch on the negative of the coil to exclude it during start-up.
