hello to all here :Blush:, yes i am the beginner . can i ask a really serious question . my hymer s700 merc is 1992 complete bog standard no alteration electically , question i have read so much on pulse charging of the batteries via alternater . my alternater is a k1->14v 23/55amp bosch 0 120 489 331 332 / 1197 311 022 EL14V4C. this is to me ????????????????. yes ! i have a few relays 70amp ect, . does any one know what the above means ? :Sad: well i have read a link of sterling power chargers . a digital charger that can charge my batteries 100% full as apposed to 75/80% full as the pulse can not charge full because of the fail safe put in place , but the digital can some how , my camper is 1992 old a bit i think , but will the wiring stand up to this kind of power as i have read also cable thicknes is crucial to thin cause a fire to thick and your power gets drained away even if you do not use any thing , so what can any one advise me as the reading is pretty bang up in here , nice reading good stuff , even if it does cross some wire s in the brain box lol!! . also solar power seems an interesting topic too , any way thanks for letting me have a say in here all your feed back is crucial denton.