Batteries overcharging when connected to mains

[Mr Frosty]

Hi everyone, we are currently having a problem with both batteries in our motorhome showing as overcharging when connected to electric. The engine starting battery reads 12.7 volts  and the leisure battery reads 13.3 volts before being connected to the mains. Once connected the starting battery jumps to 15.8 volts and the leisure battery to 17.1 volts. Any ideas on what the problem might be? 
Many thanks 

[Keithl]

What are your MH details and age and what make and model is the charger?

[Mr Frosty]

It’s a 2012 Hymer B614. The charger is not separate but is built into the elekroblock ELB101

[MikeF]

1 hour ago, Mr Frosty said:

ideas on what the problem might be? 

First check the voltages with a multimeter if you are reading the volts from the control panel. If the voltages are indeed in excess of 14.6 volts then the charger is faulty.

[Labby]

If , as  it seems , the built in charger is faulty www.apuljackelectronics.co.uk can test and repair it  or supply a replacement , it is shown in their catalogue in the Schaudt/Lippert section

[Mr Frosty]

Thanks will check with multimeter in the morning. Thanks also for details of company that may be able to assist. 

[Derek Uzzell]

Apuljack EDL 101 link here

https://www.apuljackelectronics.co.uk/Schaudt-Elektroblock-EBL-101-Fuseboard-with-Integrated-Charger__p-25.aspx

[Mr Frosty]

Thanks Derek 

[lewisturn]

udo.lang@schaudt-gmbh.de

makers of Electroblock they will sort you