coventrylad

Sterling pro combi 24 volt pure sine wave 2500 watt.

Sory for the miss understanding Chris, the combi was tride first, then the engine driven alternator then the combi again, same results. as i said the combie was on fast then constant charge but only giving 26 volts, I could under stand 26 volts if float charge but it was not on float charge, as I said battery voltage before tests 12.80 volts. cheers.

Hi Chris. the combie was tried first. 1 amp 26volt, then the engine/dc alternator, straight away the dc alternator was giving 28 at 10 amp. the batteries as said were only showing 12. 8 volts, the combi was not on float charge, it was on fast charge mode. I really hope the combi does not have a problem, been over the moon with it till i started measuring amps and vots out put. perhaps its a case of a little knowledge being dangerous

Thank you once again for your help I really do appreaciate the time you put in to answer peoples queries and or wories. Been on the boat again today with meter in hand ! the alternator is putting in 28 volts at about 10 amps, load the inveter the volts drop for a few seconds then go back to 28 volts and 50 plus amps. switch the engine off, start the generator 2500watts suppling 233 vots to the pro combi clamp meter on 1 amp being supplied at 26 volts ! reading on the batteries prior to this 12.8 volts I have used 95mm2 cable from dc alternator to battery bank approx 12 inch, and also 95mm2 cable from combi to batterie bank aprox 3 foot. measured voltatage at combi and at batterie bank no voltage drop at all. So why only 26 volts at fast charge rate and 1 amp when the dc alternator is giving 28 at 10 amps ? I have emailed Mr Sterling and am awaiting a reply, I am not a happy bunny at the moment. And your thoughts would as ever be greatly appreacited. Oh the genny is not a inveter genny just a 2.5 kva 50 hert jobby. thanks again.

Hi, I also have a stirling pro combi, wired exactly as you have said. When my generator is running (2,5 kw honda)the combi goes on to shore power and battery charge mode auotomatically. Today a pluged a 1500watt hoover 240 volt in to one of the sockets, and then put a clamp meter around the poitive dc from the inverter to battery bank and it was showing an increase in amps, so does this mean the combi was putting in more juice to the batterys or were the batterys suppling juice to the inverter? I now have four 110ah batts connected in series parraell to give 24 volt. when i did this last week with only two 100 amp old batterys, the amperage shot up to 50 amps, im sure today it only showed about 4 amps. If you can follow all that i would be even more impresed with you than I am now.

Yes it is 24 volt 140 amp. Prestolite BLP3250HMP. bought it brand fine new for not a lot of money off ebay and yes its about the size of a small dustbin!were fitted to routeman busses I beleive.as I said when I load the inverter the lister starts to work deffinate change in engine sound, and the amps rise to 50 amp, normally giving just over 28volts wheather on tick over or with a few revs. I must confess i have not checked the volts when under load, will do that friday. thanks for all your help.

Hi ,with the Lister running at 650rpm the alternator is spinning at 2500rpm, at this rpm the avaible amps according to the charge profile is 100 amps, rising to 140 amps at 6000 rpm. I machined two pulleys one for the crank and one for the alternator

Just walked past your boat at sawley! snow is melting now oh and your boat looked just fine

I know im thick, but can some one please explain to me why my 24 volt 140 amp engine driven alternater is only putting 5 amps in to my domestic battery bank (dc clamp meter) now if I switch on my henry hoover which is run through my stirling 24 volt 2800watt combi it rises to 50 amps. Even if the battery bank is quite low on volts i.e 24 volts it still only gives out 5/6 amps to the batterys. I have geared the pulleys to give 2500 rpm alterneter speed at 650 rpm crank shaft speed. It almost seems as the batterys are not "asking for a higher amperage. I only have at the moment two 100 amp batterys conected to give 24 volts. very old batterys as well. so what is happening please ?

just becauce one chooses to live on a boat why is it frowned upon to have some of the "white goods" that can relieve you of the teadium of domestic choirs, thus allowing one self more time to enjoy the better things in life ? The word luddite springs to mind. Of course It could just be the ramblings of some one who wishes he could afford all these "white goods" and the means to supply the amount of electricty that they need.But then I am rather a cynical person.

Thats probably because the advert says quite clearly "collection only "

Hi folks, Just a quick question , At what state of charge should I start to recharge my 24 volt domestic battery bank please ? Not the charge voltage, but when the bank drops to what voltage should I start my recharge. Thank you all very much.

Hi folks, my domestic battery bank is to be 24 volts, If I was to buy 4, 6 volt batterys rated at 225 amps each, and had them wired in series, would that give a total of 900 amps at 24 volts ? As apposed to 6, 12 volt 120 amp batterys wired in series / parralel would give 360 amps ? I am sure you can see what I am thinking, but am I missing some thing here? thank you very much.

onset of alzheimer's ?

Are you drunk ?

No , i do not, If one was to look at the power curve for each alternator, it would give you the out put at a specified rpm and one could then run there engine at the correct speed for optium charge amps. Just because you may have a 140 amp alt, it will not of course give this ampage out at low rpm. With regards to self destruction of the alt, how could this possibly happen IF you have worked out the gear ratio and have the power curve to hand, which is what I suggested ? or you could of course just get a clamp meter and check the out put at varying rpm.

As other have said, diesel engines work far better and feel happier under load, and should also be quiter under load, As for the speed of the alternator it is all done to to fly wheel / pulley ratio. if it is geared right you may well get max charge amps at a slower rpm, But you would really need to find the power curve of your alternator to obtain the most efficent rpm for maxium charge rate.If you have a rpm gauge on your engine the pulley ration and speed of your alternator can be worked out very simply. divide the diametre of your engine pulley by the diametre of the alternator pulley, this will give the gear ratio. so for any easy example if your engine pulley was 200m and the alternater pulley 50mm then you would have a ratio 4.1 so in lay mans terms if you engine is reving at say 500 rpm the alternater is going 4 times as fast i.e 2000rpm. then go back to the power curve and see what amps you are getting at 2000rpm. not a lot i guess. Sorry if i have rambled on a bit

Hi Robbo thank you for your input.The boat is not yet finnished,so i am unable to do a power audit even if I knew how too ! All the lights are led from bedazzled, but we are going for a domestic 240volt aa rated fridge, and a 240 tv, plus a small zanussi washing machine. my sterling pro combi s 2500w (24 volt.) is conected to 6 110 amp 12 volt batteries connected in series parralel to give 24 volts, my the lister engine is 12 volt starter and alternator, but with a 140amp 24 volt lecce neville alternater to charge the 24 volt battery bank. I have seen a Honda EU26I wich I like the look of 2600 watt , I am not sure if it would cope, I have emailed Sterling for there thoughts but as of yet no reply. Yes its petrol but I have a for wont of a better word a box on my tug deck which could house it, but is it big enough do you think ?

Hello every one I would like to thank you all for the input. 240 it is then.But which one ! I have a fair bit of space in the engine room, enough for one of them silenced kipors of about 6kw, but have mixed feelings about there life span. An old old Lister Petter though I love them dearly are just too noisy. The budget is max £1500, the pramac look good but just out of my price range.Any thoughts pleaes ? I am loath to go for anything chinse built.so about 5 kw but quiet ! thank you all again

Could I please ask the members on here who are far better clued up on electrickery which would be the best option. A diesel driven 5kw 240 volt generator wired to my stirling pro combi, or a diesel driven 24 volt 180amp alternator wired to my battery bank. I am sure I have heard some where that it would be better to generate dc, rather than ac through my stirling pro combi only for it to change it to dc. I hope you all can follow the above (I am talking about a seperate diesel engine, Not the main propulsion engine )

Hi it is a CS 12/2 OR A CS 16/2 either 12 or 16 bhp. Not a small aegine by any means and very very heavy, quite rare to find in the UK now, as apposed to the cs 5 or 6. theres some good vids on you tube, also there have been one or two fitted in to narrowboats.

Keep me informed fella please. I am soo tempted to order one, so wait with bated breath for your report.

I like it , It just sounds too good, perhaps I am just too sceptical, It would be perfect for my back cabin as well. Go on treat your self and give us all a report.