Join Date: Jun 2007
Location: West Berkshire & E. Dorset
My Motorhome: Autotrail Frontier Delaware
Sargent Charger unit
My MH is fitted with the sargent power supply unit PSU 2005 and the EC200 control panel.
My concern is the charging voltage being insufficient, and wonder if other more technical buddies think the same.
From their spec:
Mains Input 230 Volts AC +/- 10%
Frequency 50 Hz
Output Voltage 13.5 Volts nominal
Output Current 12 Amps nominal
For optimum performance and safety it is essential that only a proprietary brand LEISURE battery is
used with a typical capacity of 75 to 120 Ah.
Now my understanding is that a 12v battery (or batteries) require around 14.4 to 14.8 volts, both to fully charge and to keep then is good condition (undercharging causing sulphating of the plates,etc.)
Also, most MH users nowadays fit additonal power - I have 2 x 110ah batteries, but the "typical capacity" quoted is 75 - 120ah.
Having previously been in touch with Sargents, they say the battery gets the required 14.4 volts when the MH is being driven, via the split charge relay, and this is enough to keep the batteries in top condition.
However, the MH is not on the road every day, sometimes not for a few weeks, so is this damaging or reducing the life of the batteries? They remain on EHU on charge when at home!
Also, can you couple another charger, like a Ctek unit, and leave it in parallel with the Sargent unit, to use to give a bigger boost to the batteries, with or without the Sargent unit on/off?
Has anyone else envisaged this problem, and found a way round?