Solar panel disconnection (1 Viewer)

Apr 9, 2018
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Hi
The solar panel and controller seem to be over voltaging ( sure that is not a real,word😀) my caravan battery. I have changed the settings but still doing it.

As the sun is out longer these days 👍😊 I have disconnected the panel from the controller and the battery from the controller.

As the panel is still on the roof is that going to get damaged not being able to send it’s volts anywhere?

Thanks
 
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David and Sally
Apr 9, 2018
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The main control panel in the caravan keeps displaying a message saying Leisure Battery Over Voltage when I have left it for a few days but not on EHU. The battery is being charged to about 14.8v which is too high for a lead acid type. I think.

The controller is made by Truma so whilst I decide what to do I have disconnected the solar panel.
 
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David and Sally
Apr 9, 2018
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So, given I am in for a new controller, please recommend one.

One leisure battery only. Lead acid only . Battery is efb type.

Thanks for your help all.
 

Terry

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Mppt 👍 cheapest 30 amp I can find on Amazon next day is £24 then upwards to £250. Your decision how much you want to pay, but with one battery you don’t need to pay a fortune😉If you want very good then anything by Victron but it will cost. I would wire the solar controller straight to the battery 😉

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Terry

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Can't remember ;)
I have had a cheap £ 15 controller working on a solar panel and single battery working trouble free for 5 years no problem ( not on van )
 
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David and Sally
Apr 9, 2018
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Sorry about another question. Assuming 100w solar and 100ah battery, what rating do I need for a controller? 10ams, 20 amp etc

Thanks
 
Jan 8, 2013
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Happy FLT since 2011
Sorry about another question. Assuming 100w solar and 100ah battery, what rating do I need for a controller? 10ams, 20 amp etc

Thanks
10 Amps will be fine but I would definitely buy a dual battery controller if you change it.
I've used the cheap and cheerful ones for years without any problems
I fitted a fuse breaker so I can isolate the panels if need be
The panels will come to no harm being switched of.

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Sep 23, 2013
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Since 2008 (started in a VW T4 campervan)
The Truma could charge up to 14.8v at the end of the bulk stage, but it should then drop to 14.2v if set for a gel battery, or 14.4v for AGM or standard wet cell for a further 2hrs before finally dropping to 13.8v & holding there (float stage).

If it's not dropping, then either it's faulty, or there is a smallish drain, sufficient to keep the battery in the bulk stage, but not sufficient to drag the voltage down.

Once it does go into either absorption or float, it shouldn't go back to bulk until the voltage drops below 13.3v.

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David and Sally
Apr 9, 2018
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I don’t think there is a draw as there is a master switch to shut everything down. Not as complicated as a Moho system.
As Lenny HB said, maybe a duff controller.

Have disconnected it as we are a permanent site with occasional trips to sites with ehu. But, as the van is fitted with solar I do want it working aok. So, a Victron 10 or 15 amp it is.

I really do appreciate the info from you guys. Nowhere on the planet is the breadth of experience that is on this site👍😊
 
Dec 30, 2017
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I don’t think there is a draw as there is a master switch to shut everything down. Not as complicated as a Moho system.
As Lenny HB said, maybe a duff controller.

Have disconnected it as we are a permanent site with occasional trips to sites with ehu. But, as the van is fitted with solar I do want it working aok. So, a Victron 10 or 15 amp it is.

I really do appreciate the info from you guys. Nowhere on the planet is the breadth of experience that is on this site👍😊
I have one of these https://sargentltd.co.uk/shop/product/10amp_mppt_solar_regulator/334 on my Benivan does the job OK but no bells, whistles or flashing lights!
 
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David and Sally
Apr 9, 2018
8,757
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Worcestershire
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March 2018
Interesting.

This article says max voltage for efb batteries is 14.8v. That is what the solar controller is getting the battery to but the caravan control panel comes up with the over-voltage message.

 

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