Fitting a BatteryMaster
Sitting on the driveway and not moving is not exactly how a vehicle battery is supposed to operate. Checking the voltage of the engineer battery via a meter plugged into the ‘cig lighter socket‘ indicated a steady downward rate to 12.0 volts. Not wanting to damage the battery as well as have to do a jump start in the future I did a bit of research and found advice on various forums which would solve the problem.
[vehicle in question is an Elddis Accordo 125 badged from Dolphin Motorhomes. This vehicle is based on the Peugeot Boxer.]
The BatteryMaster from Van Bitz, this would (after connection) monitor the state of the vehicle battery and if it dropped below 0.5v below the leisure battery it would send a current down the circuit to the vehicle battery.
Thus when hooked up to the mains at home and keeping the leisure battery charged I could also keep the vehicle battery charged.
All great in theory but does it work?
Yes, I can confirm it does work exactly as described and the state of both batteries is controlled via my domestic hookup from the garage.
Installation/ Fitting the BatteryMaster
Once ordered the device was delivered within a couple of days. Now the technical bit, where was I to fit it. The wire length of the three leads from the BatteryMaster was measured in inches rather than meters. I opened the main electrical box under the bed and examined the wiring. The wiring diagrams supplied with the motorhome were pretty none existent so they were not much help. A quick email to Van Bits requesting further info was answered very quickly (excellent customer service). Confirming their info with a multimeter indicated that I could fit the BatteryMaster alongside the mains electrical box.
See pic below of the wires requiring connection.
Red – Black – Green. See Photo below with wire indicated.
I stripped the insulation on these and soldered the three BM wires as indicated. Switching everything back on resulted in a red light from the BM indicating it was ‘working’ fine.
This has been confirmed over the last few weeks with regular checks of the battery volts.
Recommend this product if you need to keep your vehicle battery topped up between drives.
Don’t confuse the red/orange wires for red!
Truckin' Tuckers 
I’m awaiting delivery of a Vanblitz and finding the installation intructions very clear and informative.
Looking at my Elddis Evolution 115 fusebox, there is a switch at the botton left of the box exterior. It is presently off but what is it for?
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John
Don’t know what the switch is. Could be fitted as a isolator for an accessory or is it a trip switch fitted to protect a circuit.
I found a main fuse protecting the battery UNDER the floor and with the permanently boxed in section rear of the wheel arch. Made a little access door to get to t is needed. Could the switch isolate any solar panels. I’ve fitted a double pole isolator on our self fitted solar panel.
I suppose you could play with the switch and see what works or doesn’t or try and trace the cable line to the component!
best regards
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Hi, I may be being obtuse but I’ve looked at your pictures regarding fitting a battery master until I’m bog eyed but I can’t see which wires you’re referring to. I’ve already fitted a battery master to our 135 but using long connections from battery to battery and while this works I’d much rather fit it as you have done. If you could point out the correct wires I’d be very grateful as your blog is the nearest I’ve found on the internet to telling me what I want to know.
Kind regards Brian.
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Hi Brian
I have updated the post with another image at the bottom indicating with arrows the red, black and green wires that I picked up to splice onto. It’s now been working great for four years, with the solar panel adding a trickle charge over the winter never an issue to get started with the vehicle battery.
Good luck with the job.
best regards
Eddie
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