Power supply

Submitted: Wednesday, Sep 25, 2013 at 10:52
ThreadID: 104476 Views:1726 Replies:6 FollowUps:1
This Thread has been Archived
Hi everyone. Please bear in mind that I have a limited knowledge of power systems and supply. I have a Tvan with 240v and Hella/merrit plug outlets inside. When I am using the Tvan's battery as a power source, does it make a difference to the draw from the battery as to which type of plug I plug an appliance into. i.e. If I plug the same fridge into the 240v plug or the Hella/merrit plug will it flatten the battery any faster or slower?? Cheers. Thanks for any advice
Back Expand Un-Read 0 Moderator

Reply By: Member - reesman - Wednesday, Sep 25, 2013 at 11:28

Wednesday, Sep 25, 2013 at 11:28
Tastpa the best supply is the most direct, 240 volt conversion from battery will have some extra losses, albeit small these days. Happy Tvanning from fello Tvanner
AnswerID: 518715

Reply By: Garry S3 - Wednesday, Sep 25, 2013 at 12:37

Wednesday, Sep 25, 2013 at 12:37
Battery power need to be converted to AC in order to run your fridge at 240V setup. Whereas, if you connect the fridge through Hella/merrit plug, it would draw 12v directly off the battery. I would keep it direct as any conversion means chances of losing power in between. Quick googling shows that typical inverter lose 20% of power converting from DC to AC.
AnswerID: 518719

Follow Up By: lin q - Wednesday, Sep 25, 2013 at 18:02

Wednesday, Sep 25, 2013 at 18:02
Need to convert the amount of suitable battery to function properly...
0
FollowupID: 798628

Reply By: Nomadic Navara - Wednesday, Sep 25, 2013 at 13:04

Wednesday, Sep 25, 2013 at 13:04
When you talk about powering your frige from 240 V I take it you mean through an inverter. If you are doing that then you are incurring two lots of losses. The first is in the inverter. The second is in your power supply when you convert from 240 V back down to battery voltage. Go direct from your battery as the others have suggested.

However if you are on mains power then power your fridge from the mains through the power supply. This gives your battery charger a better run whilst it is bringing your battery up to full charge.
PeterD
Retired radio and electronics technician

Lifetime Member
My Profile  Send Message

AnswerID: 518720

Reply By: Alan S (WA) - Wednesday, Sep 25, 2013 at 14:57

Wednesday, Sep 25, 2013 at 14:57
Tastpa

I also have a TVAN, although a MK2. The 240volt outlets only work when the TVan is plugged into 240volt through the outer socket on the Right hand side. If as you mentioned you are only using the battery as the power source only the 12volt merit plugs will have elctricity.
Should you then want to use 240volt as mentioned by others you will need to plug an invertor into the merit plug.

Alan
AnswerID: 518724

Reply By: Rangiephil - Wednesday, Sep 25, 2013 at 15:23

Wednesday, Sep 25, 2013 at 15:23
Quote you will need to plug an invertor into the merit plug.Unquote

And any inverter big enough to power a fridge will far exceed the rated current capacity of a Merit plug. So a 50 amp anderson plug may be more appropriate.
Regards Philip A
AnswerID: 518726

Reply By: Tastpa - Wednesday, Sep 25, 2013 at 18:05

Wednesday, Sep 25, 2013 at 18:05
Thanks everyone for the info!!
AnswerID: 518734

Sponsored Links

Popular Products (13)