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Kate84

Diy caravan electrics; connecting to battery

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Hi there, I’m new to all this been doing up a recked caravan from scratch. Today bought a leisure battery and smart charger from Halfords, but not sure how to connect it all up! All my 12v lights and stuff go to a blade fuse box. My hook up goes to a switch then on 240v sockets. 

 

Do i connect charger to mains, then lead from charger to battery and lead from battery to 12v fuse box? Can I use on lead from battery into caravan and the split for charger and 12v system? 

 

Will i I be using power straight from charger on hook up and not charging the battery? 

 

Do I need any relays or fuses? 

 

Any advice much appreciated! Thanks

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From the leisure battery to the fuses that you have insert into that wire a fuseholder with a 25 amp fuse in it, that will prevent potential fires in the event of a short on the +ve lead from the battery.

 

The smart charger feed from your 240v circuit at a convenient point either instal an additional socket or use an existing one. The output of the charger can be connected to the -ve of the battery and the positive to the fused cable above, the opposite side of the fuseholder to the battery. A quick sketch below

 

image.png.853187017d02869a3d4ca6b0b86f70dc.png

Dont worry about the charger when using the system it will look after itself. When you apply a load to the 12v (lights / pump / TV) the smart charger will supply the current, if more current is needed than the charger can supply, the battery will supply and then the battery gets recharges when there is spare capacity from the charger.

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Thank you so much for your help, that’s great. What size cable would you advise from battery? 

 

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Also sorry but having trouble working out what to use for fusing the battery, all the in-line ones don’t seem to take thicker cables, any ideas? Thanks in advance 

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6 hours ago, Kate84 said:

Also sorry but having trouble working out what to use for fusing the battery, all the in-line ones don’t seem to take thicker cables, any ideas? Thanks in advance 

https://www.ebay.co.uk/itm/INLINE-CAR-FUSE-BLADE-HOLDER-30AMP-12V-SPLASH-ROBINSON-K265/170976134151?epid=25026727171&hash=item27cef8c407:g:NvoAAOSwtGNZzh9k

 

If you need any additional wire 4mm2 cable should be OK, again ebay will be your friend, automotive cable.

 

https://www.ebay.co.uk/itm/4mm-41-Amp-12v-240v-Tri-Rated-Cable-Auto-Wire-Car-Automotive-Marine-Solar-Loom/202659853961?hash=item2f2f77f689&var&_trkparms=ispr%3D1&enc=AQAEAAADAKvsXIZtBqdkfsZsMtzFbFsbX3WcW5fmB%2Fx7ZbaZTyex%2BHIP0oouWKoj0g4etoWNsYnn0MrqjPGctZ4c8Lz16Vi1TautABmuLn8qwL%2Bd1eviGqRu%2FywdWmCM7ZgaKZiOK12K7mqM5vw9Ny9EJA3iKX5XeMxtIaoyIk4cRhFPBXs9shn7%2FWkRuia%2Ft5Ml7d1CTC6N9YEgWP%2FQ1MyHwURXpQpTaYCjx7pZ4r16HHQNlcwPWMsHvmko2QRL5K9V0xj6dng6IFmTW3c77O5kjJB9Zx5snb6aJGbssGgR1jBwXZPapxDN%2FxcndVC8OI252K%2BVz1y2dDDKahpzjdJFYcEZq7s%2FszfWJtaiEhumVfM%2Bg2sq2CA9GhCsg3PJhlrRL4wOBkSikDRJvdiXST1%2FrVPTbtW2RPe%2B8cf3J5tMmZDSN9xS%2BVTgq3izTa37%2FYkhWpsFRjgZcuDaRm%2BhSU37TrbWkr3hdseBBZEzTILq3wnh%2FNSDJ20nzUA4k2VwJaLtifDrD45ngfPlK1Xe5YR28Vv4ubSJa0sKynAUm%2FTVgj0MGO1oWq9DQBc5hXrDhyO92cXlK12n4xpeYMXtAIScQqu%2BUzHbgOctmmhOaYs6rOPZrG0n%2FzIYrSiaUKekMyYgIrDLb1Q97LlyigTKoJH%2FlGuHi3XEuLFnO1g6w2z1CWAP9%2BUKd%2Ft%2FmrGk7acsK76yvCLkHavrclB2YnnVEwntFhyr%2B4x0qH3nAp07BcTIp21Ujsju2YkmBHk6tRQBDjOtHd%2BfV6gobv2Pq3PXYz4YMwsG%2BAabCZrpV%2FaukV8thrL%2BUhYafxpNGMo1XBaMZdrMZFyQk%2BycCBCkrDuL4lbKITt0DZUDjvf9hPiIz7dG83sduQgQ6R0tc11IgMLuBu8QPLYhZW3sHjah410EnM0s%2Fc5MGX0K6MJJ4WKQOU69y4k0OR5S0CaG2q61FcqxOELwLnlT9DKtdBBl4FttEFGRT94sdTrvH3izWPbLEc7a8U45kMxSYF0Ef69L2lOX7gk0ojZk%2BQ%3D%3D&checksum=2026598539616ca24a12d21d4e9fbce6e81e19aff3e7

 

 

 

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Tip

 

eBay and Amazon links can be shortened.  Delete everything after the long number.  So the second link above could be just

 

https://www.ebay.co.uk/itm/4mm-41-Amp-12v-240v-Tri-Rated-Cable-Auto-Wire-Car-Automotive-Marine-Solar-Loom/202659853961

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3 hours ago, kelper said:

Tip

 

eBay and Amazon links can be shortened.  Delete everything after the long number.  So the second link above could be just

 

https://www.ebay.co.uk/itm/4mm-41-Amp-12v-240v-Tri-Rated-Cable-Auto-Wire-Car-Automotive-Marine-Solar-Loom/202659853961

 

:goodpost:

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3 hours ago, kelper said:

Tip

 

eBay and Amazon links can be shortened.  Delete everything after the long number.  So the second link above could be just

 

https://www.ebay.co.uk/itm/4mm-41-Amp-12v-240v-Tri-Rated-Cable-Auto-Wire-Car-Automotive-Marine-Solar-Loom/202659853961

 

Or even tidier - like this.

 

John

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Guys, apologies for not shortening links, on my phone it's not easy to do, apologies and thanks for shortening them.

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3 hours ago, Johnaldo said:

 

Or even tidier - like this.

 

John

 

OK I will ask the question that others are wanting to ask but, unlike me, are afraid of appearing a numpty, How do you do that??

 

Andy

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19 minutes ago, AJGalaxy2012 said:

Guys, apologies for not shortening links, on my phone it's not easy to do, apologies and thanks for shortening them.

AJG, no criticism was intended!  Some people embed links and I do that too; but it's nice for others to see where the link is going.

Andy,

 

Click on the symbol like a chain link

 

image.png.9bb7ba2d6b6d55384c103af439599e2e.png

 

Then, fill in the dialogue box

 

image.png.12a5e222646b042a684f5f58cd58cf50.png

 

under Link text, write the words you want to have underlined as a hyperlink.

 

Actually, if you highlight the word(s) first they will appear there already.

image.png

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AJG, how did you produce that diagram?  It is superb!

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1 hour ago, kelper said:

AJG, no criticism was intended!  Some people embed links and I do that too; but it's nice for others to see where the link is going.

Andy,

 

Click on the symbol like a chain link

 

image.png.9bb7ba2d6b6d55384c103af439599e2e.png

 

Then, fill in the dialogue box

 

image.png.12a5e222646b042a684f5f58cd58cf50.png

 

under Link text, write the words you want to have underlined as a hyperlink.

 

Actually, if you highlight the word(s) first they will appear there already.

image.png

Im happy doing links and know how to drive forum software etc, just not so easy on an iphone on the move!

Thanks though.

1 hour ago, kelper said:

AJG, how did you produce that diagram?  It is superb!

 

It was just done in word, insert shapes, change the properties for colours etc and then screenshot it with snipping tool.

 

AJG

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:Thankyou:  

 

:goodpost:

 

I have learnt something new today!

 

Andy

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If Boris wants 20,000 more coppers he should put you in charge of recruiting.  You have brains and common sense; a rare combo.

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