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Old 26-09-09, 01:46   #1
Split Charge Kits / Electrical 10% Discount on all Orders
steve_raw steve_raw is offline 26-09-09, 01:46

Raw Components Ltd

Hi, I'm Steve, I do the day-to-day running of Raw Components Ltd. I am a fully qualified electrician with over 20 years hands-on experience in the auto-electrical industry. I have spent much of my career as the sole electrician of a small firm producing customised high calibre motorhomes and specialist vehicles made to order. I have also spent some time installing and repairing auto-electrical alarms, immobilisers, etc on cars, vans, trucks, tractors(!), etc. and worked on hundreds of T4 vehicles at Purfleet, Dartford to be distributed for the AA Vehicles

Now I run Raw Components Ltd, a move which allows me to pursue my interest in electrics, and gives me greater work flexibility.

So what about Raw Components? Well, the business was started because I believe there was a need for a high quality, competitively priced auto-electrical retailer.

I only use reputable UK suppliers who adhere to the latest safety standards. If you want quality then look no further.

If you want something for your car/motorhome/caravan/camper conversion but need technical advice then dont hesitate to contact me.

email: [email protected]
Tel: 0844 586 7752

or you can contact us via or website at http://www.rawcomponents.co.uk on the "contact us" link at the bottom of the page



We have many satisfied T4 customers who have purchased from us over the previous year

We are extending our 10% discount for T4 Forum Members for a further year


The new code is >>>>> T4FORUM10%


Why not take a look at >>>>> http://www.rawcomponents.co.uk

or you can ring on 0844 586 7752 for advice or to place an order

Just ask for Steve

If placing an order on the Phone then please have the discount code to hand as you will be asked for it. If ordering on our website then you will need to type in the code to claim the 10% discount before proceeding to checkout

Kind Regards, Steve
steve_raw
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  #2  
Old 26-09-09, 11:53
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t5 strauss t5 strauss is offline
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Default Re: Split Charge Kits / Electrical 10% Discount on all Orders

hi i can highly recommend Steve, he is a top guy and also gives some really good advice. all the best Steve and thanks for my spit charger i am well happy with it, also the instructions where spot on, once again cheers.
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Old 26-09-09, 12:19
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Default Re: Split Charge Kits / Electrical 10% Discount on all Orders

just sent you a message through the site. im thinking this kit will do me though. http://www.rawcomponents.co.uk/all-c...relay-kit.html
cheers Ron

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Old 28-09-09, 09:37
steve_raw steve_raw is offline
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Default Re: Split Charge Kits / Electrical 10% Discount on all Orders

Quote:
Originally Posted by rocketron View Post
just sent you a message through the site. im thinking this kit will do me though. http://www.rawcomponents.co.uk/all-c...relay-kit.html
cheers Ron
Hi Ron

The Kit you have indicated is really suitable for battery banks up to 180AHrs >>>> http://www.rawcomponents.co.uk/all-c...relay-kit.html and would be suitable for 2 x 85AHrs giving you 170AHrs of battery capacity

As you are looking at installing one battery of 110AHrs at the moment and doubling it in the future then you would be better off looking at this item which is suitable for battery banks up to 220AHrs which is what you will have if you upgrade >>>

http://www.rawcomponents.co.uk/split...relay-kit.html

I recommend the 220Ahr kit above due to the load the amps pose on the system. Take this example…. You are running the amplifiers whilst stationary and the second battery / batteries are running low then the temptation would be to switch the engine on to recharge them. This is ok but now the split charge kit not only has to try and charge the batteries but also supply the load current for the amplifiers

The amplifiers will pull at least 75amps between them and the batteries will also suck power from the alternator and the starting battery. All this power will have to get thru’ the split charge kit in a low battery scenario. The kit that does up to 180AHr comes with 70amp fuses. Looking at the example above the fuses would become stressed and may blow fairly frequently whereas the larger kit can be supplied fuses up to 100amps even though it is listed with 80amp fuses. The fuse increase is possible as the relay is rated at 200amps and the cable 170amps on the 220AHr kit with a surge of 500amps for one second possible.

I wouldn’t recommend a larger fuse than 100amps because these blow at 200amps

Next thing you are going to say is that your alternator is only rated at 90-100amps. Take off running power and you are probably left with 40-50amps so why the large kit

Ok, your alternator throws out some 90-100amps but when the split charge kit is energized the second batteries are connected to the starting battery which has some 400-600 amps reserve capacity which is normally used whilst cranking. So in essence you have the 90-100amps off the alternator if lights, heaters etc are all off plus the reserve capacity of 400-600amps in the starting battery that can potentially flow thru’ the split charge kit to recharge the second bank of batteries and run the 75amps or so the amplifiers need. If the kit is under powered then the worst thing that can happen with our kits is that you blow a fuse or two. Fit the larger kit and you will reduce or totally eradicate nuisance fuse blowing as the larger fuses can handle higher surge currents. Are you beginning to understand?

It is surge currents that kill split charge kits and fuses. Fit more batteries and heavy loads the surge currents are much higher. These surge currents may only last for a split second but they are enough to take out the fuse or damage relay contacts if the split charge kit has not being correctly selected.

Why do you think all these 30 and 40amp split charge kits burn out when running large battery banks and high powered amplifiers, inverters or winches etc. The Laws of Electricity show that the current will be derived from the highest voltage source first which is the alternator when the engine is switched on. If you had a 30amp split charge kit fitted then the 75amps the two amplifiers would need and the current the extra batteries would require would flow thru’ the split charge kit and inevitably blow its fuses and possibly damage the relay contacts. Constant abuse on damaged relay contacts results in welding off the relay contact resulting in the starting battery and the second battery permanently connected together meaning that there is no separation between the batteries when the engine is off. This would mean that the loads connected to the second battery bank could not only discharge that battery but also drain the starting battery due to welded relay contacts!

If your amplifiers are running at 75amps between them then a 220AHr battery bank will only last 220 / 75 = 2.9 hrs with the engine off and no other forms of charging. In reality you can reduce this figure by 20 – 30% because there becomes a point when the voltage will be low enough for the amplifiers to shut down. Some amplifiers and even inverters have low voltage shut down as a standard feature built in to them. A 20% reduction would give 2.3 Hrs running time from a 220AHr battery bank. As you are planning on only installing one 110AHr battery initially then these times can be halved. Of course reducing the volume will extend battery running time

I could rattle on further but this will do for now. If you need more advice then please shout or even better give me a call on 0844 586 7752 as discussion is often easier than emails


Kind Regards, Steve
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Old 28-09-09, 09:59
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Default Re: Split Charge Kits / Electrical 10% Discount on all Orders

WOW. thanks steve. i will deffo go for the larger kit. im rather limited for space to put batteries as i have custom built seat bases and i can just fit a 110a/h battery so i will fit a sealed unit under each seat. i have a small geny that i use to charge whilst parked up so it should be ok.

thanks very much for your very conclusive reply. it made lots of sense even to a dullard like me..

thanks again steve.

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Old 28-09-09, 20:22
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gazzagee gazzagee is offline
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Default Re: Split Charge Kits / Electrical 10% Discount on all Orders

Some really good advice there thanks, I'm just about to install 2x 110amp in mine and will get the kit, can I ask what is the length of cable you get.

Gary
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Old 28-09-09, 23:14
steve_raw steve_raw is offline
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Default Re: Split Charge Kits / Electrical 10% Discount on all Orders

Quote:
Originally Posted by gazzagee View Post
Some really good advice there thanks, I'm just about to install 2x 110amp in mine and will get the kit, can I ask what is the length of cable you get.

Gary
Hi Gary

The following kit that is suitable for 2 x 110Amp batteries giving you a 220AHr battery bank is available on our website in 3, 4, 5, 6 & 7m options. If you require a different length then we can accomodate any length required. Just drop us a message

http://www.rawcomponents.co.uk/split...relay-kit.html

Do not forget your discount!

You may also be interested in this item to give you an indication of how much power is left in your batteries >>>>

http://www.rawcomponents.co.uk/split...nitor-kit.html


Kind Regards, Steve
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Old 06-10-09, 22:00
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Default Re: Split Charge Kits / Electrical 10% Discount on all Orders

Hi steve,
Just wondering if you could help me, i had bought a cheap split charge kit from fleabay and after a month has already packed up.
I have an 1000w amplifier running from my second batteries (combined of 2 UPS batteries) accumilating to approx 80ah. may be adding more in the future.
I appreciate your kits have all you need in the pack but was really just looking for the relay as i have all the cable, fuses and crimps readily available from work.

I was looking at the 100amp relay with intelligent charge and then noticed the 200amp relay at a lower cost as is not intelligent?

If i get the 200amp (preparing for future power) with no inteligent thing. do i have to connect to the alternator?

Or should i just go for the 100amp intelligent straight from the battery?

Would i need the relay socket holder with fuses for install?

Many thanks, Lewis
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  #9  
Old 07-10-09, 11:10
steve_raw steve_raw is offline
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Default Re: Split Charge Kits / Electrical 10% Discount on all Orders

Hi Lewis,

If you just go for the standard 200Amp relay then you will need to pick up an alternator battery warning light feed to trigger the relay. You will not need a relay socket for this size relay

I would advise against the 100Amp intelligent relay as it is only rated at 100amps continuous. You are packing a 1000W amplifier pulling some 80amps or so. When the engine is on with all the heaters, lights etc off on the vehicle then there will be full alternator output , some 80 or 90amps available to flow down the split charge kit. You may think this is fine as its less than 100amps the relay can carry.

Take this scenario....The second batteries are running low and the amplifier is hurting your ears, perhaps pulling some 80amps or so as you have it cranked up. As I mentioned eariler in a previous posting the current will come from the highest voltage source first, the alternator, but if running the amplifier at high power with the second batteries running low then the starting battery will be dischaging making up for any shortfall in alternator generated current as you will have thirsty batteries and an hungry ampliflier. The 80 or 90 available off the alternator can be a lot more than this as you have some 400 - 600 cranking amps stored in the starting battery, all of this can flow thru' the split charge kit

The 100amp relay has a surge of 180amps for a brief time but if you keep abusing it then it will fail. As you only have some 80AHr reserve capacity in your leisure batteries then you can see that this will not last long. You have 80AHrs divided by the 80amps or so the amplifiers need and so you have only less than one hour of stored power which will mean that the split charge relay will have to work hard and the reason the cheap split charge kit you bought off eBay fried. At the end of the day you get what you pay for!

For your setup I would recommend the 200amp relay particularly as you say you are or maybe adding more batteries in the future, but this will have to be triggered by the D+ output of the alternator

We also have a 200amp intelligent version available which only needs connections to be made to the starting battery positive and negative terminals >>>>

http://www.rawcomponents.co.uk/intel...12v-relay.html

I hope this helps, need more help then please shout

Kind Regards, Steve

Last edited by steve_raw; 07-10-09 at 11:37.
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