Wonka

Hi Matt I have a 2007 hybrid with exactly the same problem have you managed to get it sorted out yet?

I plan to replace mine soon as it has a standard lead acid and found these on eBay (link below) https://www.ebay.co.uk/itm/383847244484?fits=Model%3AAlphard&hash=item595f1422c4:g:FToAAOSwqJJfc4JR

Hi Debbie, I don't think you need to worry about it to much I have a AH10 2007 Hybrid and had similar experience. The 12v battery is located under the centre armrest and is small so loses charge over a relatively short period powering the alarm system etc. I believe the 12 volt is used to start the hybrid system and hybrid system battery then through clever electronics powers the starter motor. It is advisable to drive the car for around 1 hour a week to keep the 12 volt battery charged. If your not going to use the car for extended periods it might be worth fitting a small solar panel to the jump start terminal under the bonnet to maintain the charge but I would discuss this with the dealer first.