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agrifabs
New Member
United Kingdom
76 Posts |
 Posted - 26/01/2008 : 18:12:17
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connected my ametek 38 (bens first blade design) up to my battery bank, i have noticed that when its all connected up the voltage never goes above 12.5 volt? only a few weeks ago i was seeing anything up to 39volts out of this setup when it wasnt connected to anything. does this problem come down to my blade design? anything i can do to make more power? how can i check to see when my battery bank is full? i put a volt meter on them and it says 12.19volts but how many amps?
chris
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fungus
Moderator
301 Posts |
Posted - 26/01/2008 : 20:27:44
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| agrifabs - thats what happens, the battery 'pulls down' the voltage to its level and 'converts' it into power. To measure the amps into your battery set your meter (if it has it)to its 10A setting/sockets and place it inline with one of the leads from the ametek. Say you were getting 4A in at 13v then you would be getting 52W of power. |
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agrifabs
New Member
United Kingdom
76 Posts |
Posted - 26/01/2008 : 20:38:41
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| does that mean that i will never see my ametek making over 13v? would bens new blade design make it produce more power? |
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Peter Williams
New Member
United Kingdom
54 Posts |
Posted - 26/01/2008 : 21:03:16
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Fungus, am I correct in saying that the meter has to be inline witn the negative side/terminal of the battery and back to the genny (if you know what I mean) and will the meter blow if held for too long? I'm sure I read mine is 10 seconds.
I'm petrified I'm gonna do myself some damage when measuring amps. Whats the saying "Volts jolt but mils kill" |
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fungus
Moderator
301 Posts |
Posted - 26/01/2008 : 21:10:25
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I think you're confusing a few things;
Batteries only vary from around 11-14v in their charge state, this a steady voltage and what you want, what happens when you charge it is that it reverses a chemical reaction inside the battery, giving you power to use later.
Volts arent the important thing, they will always be around 11-14v depending on the battery state of charge which can be roughly deduced from the voltage.
The important thing is the amps, which will vary with the windspeed and are put into the battery for later use, watts can be calculated with voltsXamps.
Any load you put on the battery will take a certain amount of amps out depending on the load, dropping the voltage and power left in the battery to use until you have none left.
Peter Williams: There should be no problem with measuring amps for a long time and re: the saying 'Volts jolt but mils kill', voltage is still needed to 'push' them amps/milliamps into your body, a 12v battery will only give you a slight prickle if you have wet hands, nothing dangerous. |
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max 12.5v when connected?
