First of all to everyone , many thanks for your response so far and l really appreciate your advice .
Last season while cruising in Brazil
, after contacting the supplier of my new Lead Crystal batteries and following their recommendations regarding the settings of both my regulators , l became convinced that the culprits had to be my two recently overhauled 150amp alts , so when returning to South Africa
for a short break l lugged both alts off for bench testing . According to the repairers both alts are 100% so it is back to square one .
Regarding some of your questions , l have two separate smart regulator systems but only one is in use at a time . In other words one is a spare ready for use with the flick of a switch . The same for my alts , one is a spare unit although l swopped them over to test each one .
At the time when l built my boat
l was pedantic about the pulley sizing and with the maximum permissible revs of the alt being 10000rpm and the engines max revs being 3000rpm l settled at 3 : 1 . Although when motoring l usually run the engine at 1800rpm giving me 5400rpm at the alt , while at anchor
l run the engine at approx 1500rpm .
I am using my battery monitor
as a reference but now l understand that it would be nett of the load on the batteries at the time , although the output is so low l can't imagine that the fridge/freezer would have any significant effect on what the alternator should be producing .
I don't have a diode battery isolator as my house batteries are charged by the Hehr , while my start battery is charged by the 70amp engine alternator . I do have a master switch which allows switching to different combinations .
The NEXT STEP regulator incorporates a battery temp sensor but l dont have an alternator temp sensor . I would like to think that l have done the best for keeping the alt cool in that l have a blower sucking all the hot air out of the engine room in an attempt to keep the ambient temp down . Secondly , the Balmar reg is set-up without any belt load management to increase output .
Regarding the cable run of approx. 3m from the alt , 99% of the run is 50mm(sq) with two very short 16mm(sq ) tails that connect from a cable clamp to the alt . l did this so that the smaller cable could handle the engine vibration better.
transmitterdan , you have given me a lot of great info increasing my understanding of how these systems work
As far as all your questions regarding voltage and current readings , my wife and l return to Brazil
at the end of the month to our beloved boat
which is where my notes are with all my tests .
From your replies l will make notes of the various tests that l need to conduct and if you can assist me with any other tests l can make to try and resolve this issue , that would be really appreciated .