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Falstaff
Joined: 27 May 2009 Posts: 1014
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dpack
Joined: 02 Jul 2005 Posts: 46239 Location: yes
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dpack
Joined: 02 Jul 2005 Posts: 46239 Location: yes
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vegplot
Joined: 19 Apr 2007 Posts: 21301 Location: Bethesda, Gwynedd
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Falstaff
Joined: 27 May 2009 Posts: 1014
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dpack
Joined: 02 Jul 2005 Posts: 46239 Location: yes
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RichardW
Joined: 24 Aug 2006 Posts: 8443 Location: Llyn Peninsular North Wales
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Posted: Thu Jul 23, 15 12:46 pm Post subject: |
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Falstaff wrote: |
1, We already have one of those little 1.5 watt ones sitting on the bulkhead and it seems to keep the battery alive for lights etc.
2, The one I linked to is rated 20 watts or 1.5 amps so in 10 hours would contribute 15 Ah in theory.
3, There is an alternator on the engine, and that keeps the Power battery charged reasonably well. After an hour or so I usually switch over so it charges the Leisure battery as well - but the Voltage drops quite significantly when it is charging both batteries. (Down to around 11 volts)
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1, It might seem to be doing this but unless you are only using a very very low wattage light for a very very short time its not. you eating into the battery storage.
2, Not in the UK it wont. You will not get full output for the entire day. In summer you might get 6 times the peak output over the whole day. So about 96 wh. Also at what voltage is that 20 watts? I would guess 18v so at the 12 to 14.4v you need the actual output will only be 13 to 16 watts.
3, This is really your best option, you have it already, its more powerful than you will need. As its a one off a small amount of fuel cost is still going to be less than buying a substandard solution. When charging both bats iof the V is that low then the leisure bat must be about 10v which it BAD for the bat. If you raise the revs it will up the voltage. |
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