Andrew Posted September 3, 2021 Share Posted September 3, 2021 Hi everyone, I've read a few topics about batteries, I'm planning to install a leisure battery under the passenger seat and presume somebody has done it before. If so please let me know the size / dimensions of the battery installed. I'm looking at 'low box' versions but wondering if normal sized leisure battery would fit under the seat. Many thanks Quote Link to comment Share on other sites More sharing options...
Pritch Posted September 4, 2021 Share Posted September 4, 2021 Hi there, if it helps, mine is under the drivers side, as think a battery will interfere with turning the passenger seat. My battery is what I would call 'normal size'. HTH Quote Link to comment Share on other sites More sharing options...
Andrew Posted September 6, 2021 Author Share Posted September 6, 2021 On 9/4/2021 at 9:06 PM, Pritch said: Hi there, if it helps, mine is under the drivers side, as think a battery will interfere with turning the passenger seat. My battery is what I would call 'normal size'. HTH Excellent, thanks for the info, my passenger seat doesn't swivel so a normal sized leisure battery should be ok then. Cheers. Quote Link to comment Share on other sites More sharing options...
Rojie Posted October 14, 2021 Share Posted October 14, 2021 On 9/6/2021 at 10:28 AM, Andrew said: Excellent, thanks for the info, my passenger seat doesn't swivel so a normal sized leisure battery should be ok then. Cheers. Have you checked there are no obstructions under the passenger seat. I assume you have. I ask because.. Some Alphards have a frame / chassis assembly under the passenger seat for additional amplifiers and 'stuff'. 1 Quote Link to comment Share on other sites More sharing options...
Chris.ac Posted October 15, 2021 Share Posted October 15, 2021 I think both my front seats have a bunch of factory fitted amps to power the 18speaker sound system I too would like some aux battery, as I travel for work and need to occasionally use laptop etc. The engine bay is a lot more packed than my older Regius, which had the possibility to fit two regular sized batteries. Im thinking some custom made Li-Ion battery pack I can install behind one of the side panels in the rear, or in the 1st aid kit cubby at the back may be the best for my needs. 1 Quote Link to comment Share on other sites More sharing options...
Andrew Posted October 17, 2021 Author Share Posted October 17, 2021 On 10/15/2021 at 10:34 AM, Chris.ac said: I think both my front seats have a bunch of factory fitted amps to power the 18speaker sound system I too would like some aux battery, as I travel for work and need to occasionally use laptop etc. The engine bay is a lot more packed than my older Regius, which had the possibility to fit two regular sized batteries. Im thinking some custom made Li-Ion battery pack I can install behind one of the side panels in the rear, or in the 1st aid kit cubby at the back may be the best for my needs. Chris.ac that's an interesting idea, I've used a few small rechargable ones for RC cars so some of those linked together might be good and they're small so like you said they can go behind a panel. I'm just wanting to power the TV and plug socket / USB in the back and perhaps mini fridge on journeys away Quote Link to comment Share on other sites More sharing options...
Jezmond Posted March 21, 2022 Share Posted March 21, 2022 I just got my Alphard and had a leisure battery fitted by a place called Fantastic Campervans. They fitted the leisure battery under the bonnet next to the main car battery. Apparently this is possible with the 2.4 litre engine but not the 3 litre due to space. It's well worth looking into. In not sure what the size of the battery is but they said its enough to power a fridge for a day and a half 1 Quote Link to comment Share on other sites More sharing options...
Lorraine Posted March 29 Share Posted March 29 Hi, just got my 2002 and leisure battery in next to engine any idea where I will find the split charger?? Quote Link to comment Share on other sites More sharing options...
pcous Posted April 4 Share Posted April 4 Hi Lorraine, Our split charge relay (SCR) is located at the back of the engine compartment (Durakool, far RH side in the photo). As you probably know already, the purpose is to split the charge from the alternator to the main starter battery and the leisure battery. The actual SCR can be quite small, it's likely to have 4-5 spade connectors, and hopefully you'll be able to find it by tracing cables from SCR to alternator and both batteries. We installed a second SCR to charge the starter battery over winter or other periods when not in use. A mains-EHU cable charges the leisure battery, and the second relay (a CBE CS2, LH side in photo) then tops up the starter battery when EHU is connected, but switches off when the leisure battery voltage drops (to avoid the leisure battery discharging totally in the event of a faulty starter battery). It uses the existing cabling between the two batteries, so the only new cabling required was under the bonnet next to the existing SCR. Very useful over winter, just plug the EHU in for a day once a week or so.... 1 Quote Link to comment Share on other sites More sharing options...
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