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Battery master


baden87

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Paul,

 

I believe they are both connected back to the PSU to share the load.

 

The best wiring diagram I can find is this one for 2007 Cheyenne and Frontier's which clearly shows 2 leisure batteries on the forth page...

 

https://sargentltd.co.uk/tech-support/article/26/download/300

 

If you want further clarification it may be best to get in touch with Sargent.

 

https://sargentltd.co.uk/contact

 

Keith.

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I think you need to connect your solar directly to the PSU but this is where Allan may be better placed to answer, or try looking at the Solar pages on his website. Alternatively ask Sargent for advice, they designed the system after all :-)

 

Keith.

 

PS I personally would not be inclined to connect the 2 batteries directly together as this could have implications on wire size and fuse capacity if ever there was a problem.

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Keith, thank you for the vote, but Battery Masters are not our favourite device. They cause us quite a few issues with short circuiting functionality, etc.

They do work and were a valid option 10 years ago, but are inefficient. Much better ways of doing things these days without upsetting the more sophisticated electronics installed in modern Motorhomes.

 

The best way to wire a Solar regulator for an EC 225 is to use the Sargent cable set (£21), see here : https://sargentltd.co.uk/shop/product/solar_connecting_lead_ec2252007/127

 

 

You can see from the picture it has all the connectors and fuses already built in.

Connect the 'bare wires' to the Solar regulator and then plug in to the EC 225. Really simple to wire up so pretty much idiot proof. The wiring in total takes about 10 minutes.

 

 

If only more professional Installers fitted them it would result in not only a better Installation, but would cut down the install time by a big margin, making the Solar install cheaper for the customer and more reliable.

 

It can take a long time to manually run cables around the Motorhome from habitation and Starter batteries with multiple connections that are then hard to find when they break or corrode.

For an Autoelectrician a non standard Solar Install can be a real money earner as it can takes hours to work out what was done, find the fault and then fix it.

 

If it is done as Sargent and the Motorhome builder recommend all you need do in the event of a problem, worst case, is replace a £21 cable.

 

If you are contemplating Solar, insist it is done as the Motorhome manufacturer and the Electronics supplier recommend.

Don't assume that because the Dealer is doing it, it will be the correct way as few do it right.

.

 

216055044_SargentEC225Solarcable.jpg.507bbdddb1ec0a59e87f85673d9036f3.jpg

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Allan,

 

Thanks, that is exactly the info I had hoped you would reply with as you have first hand experience of these things :-)

 

Paul,

 

I believe your control panel can be set up to prioritise charge of starter battery over leisure battery or vise versa. You may need to change settings between in storage or in use but once you master the settings it should be easy to change.

 

And both leisure batteries should receive equal charge from the PSU.

 

Keith.

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OK Paul, thanks for explaining your situation.

 

Unfortunately our AT is older so does not have this feature but hopefully it's detailed in your manual or another AT owner may be able to explain.

 

And I think Allan would be best placed to explain where the lead plugs in, drop him a PM or wait until he reads this thread again.

 

Keith.

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The instructions with the Sargent Cable set explain where and how to connect it up.

 

Sorry I don't have details of the EC225 instructions, only the EC500 which may be similar and states,

 

"3.4 Smart Charging

The EC500 system incorporates a smart charge feature, which monitors both leisure and vehicle

batteries and automatically adjusts and directs the charger power (and solar power if a solar panel is

installed) to maintain the leisure and vehicle batteries at an optimal level.

 

3.6 Solar Charge Management

The EC500 PSU incorporates a built-in solar charge management feature, which will control the input

from a solar panel. Depending on the charge state of the batteries, the solar power will be directed to the required battery, and continuously monitored to ensure optimum operation. For this system to operate intelligently, the shutdown button should be left switched on. If the shutdown button is turned off then the solar panel will charge the leisure battery only".

 

 

The 'SMART' feature that controls the above is the default setting on the EC500/EC480, so just plugging in the new cable should work, if the EC225 is similar in operation.

 

The EC480 manual states :

"SMART – This turns on the smart charging feature. The energy from the intelligent charger is

automatically directed to the vehicle or leisure battery according charge state of each battery.

SMART is the default setting.

NORMAL – This setting will cause the energy from the intelligent battery charger to be

directed to the battery selected manually on the control panel by the battery select button".

 

 

A copy of the EC500 manual can be found at the bottom of our Sargent page : http://www.aandncaravanservices.co.uk/sargent.php

 

 

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Not fitted one on an EC225, so I think that is one you need to put to Sargent, but the method often employed by the manufacturers is to make up a cable set with a Socket and Plug arrangement that sits between an existing 'connection'.

 

For example, you remove a plug (6 way Molex?) from the EC225 and insert the new cables plug into the now vacant socket.

The Molex plug you removed from the EC225 now goes into a premade socket on the new Solar Cable.

 

It is a efficient/reliable way of getting into the cable without cutting it.

 

Looking at the photo of the Solar cable it does seem to have a Socket and Plug arrangement?

 

Try and mount the Solar Regulator as close as you can to the EC225, trim the cable so it is as short as practical for maximum efficiency.

 

 

The ones we have fitted are the cables for the EC325/EC328. That uses a dedicated socket on those EC units allowing you to take advantage of the Solar Regulator already inside the EC325/EC328 units, and at £13 for the complete cable that runs from the Solar Panel to the Sargent box, it just makes it so cheap and easy to install Solar, see : https://sargentltd.co.uk/shop/product/EC328solarlead/126

 

 

Does the above help explain why we are not big fans of Battery Master style devices? If you are fitting one or have one, there may be a much better way of doing things? Cheaper, more reliable (fewer connections and components) and more efficient. In some cases, you just need a bit of wire.

 

 

 

 

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