The battery of diesel engine is Yokohama model N200 12 V 220 amp-hrs.
I have seen that floating charge is about 0.1-0.2 A, but the fast charging sometimes 4 amp, 5 amp, other days 8 amp or 9 amp, but everyday supply fast charging several times, for me this is not correct. the first batteries were damaged so we change all and put new.
for me is not correct this fast current everyday because this can damege the battery, the vast majority of time the voltage is high around 28 or 29 V, when is necessary to have 25 or 26 V, normally, sometime the battery rise up to 30 V and is injecting 4-5 amp.
I dont know what to do, the electrical engineer doesn't seem to know anything about it, and I'm worried about because this system is critical, in proper conditions.