Hi all
I have just purchased/stole a little Lister Petter ex M.O.D.(British Army) diesel generator from ebay see link
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=012&sspagename=STRK%3AMEWA%3AIT&viewi
tem=&item=220117710172&rd=1&rd=1
it is rated as 3.5 KVA and is 110v only (but I suspect this could be altered to 220v) My reason for the purchase is to use it as a standby 2kw charging source for times of low wind or high demand. I have an everlasting source of free veggie fuel oil so I just couldn't resist it; the engine is worth the price on its own!
So here is my objective, I wish to charge my 48v 510 ah @5hr battery bank at about 2kw. Auto start /shut down and charge control will be added later but for now I am the auto start and charge controller lol
So here is my problem and where I may need a little help please! The generator is 110v out and I want to step it down and rectify to charge my 48v bank
if I take 3.5 KVA 220v - 110v step down transformer and supply it with 110v instead of 220v will it step down to 55v rms ?
Similar to this transformer
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=013&sspagename=STRK%3AMEWA%3AIT&viewi
tem=&item=230137418202&rd=1&rd=1
If I then rectify this 55v rms to DC the peak voltage is higher but for the life of me I can not remember the multiplication factor to work out how much higher, something tells me it is 1.4??? no doubt someone can put me straight!
So will it work?
if not I would welcome any suggestions on how best to proceed
Many thanks in advance for those that take the time to reply.
Russell