Just bought a Noco 1000 amp starter that suits up to 6 litre petrol or 3 litre diesels. Good offer on ebay for a B graded one but it was actually brand new in a box. There is also a 20 percent code that finished Today and makes it under 70 pounds for a top quality unit.
I am parking up for 36 days in March when i go out to the Caribbean so it may be helpful if the car battery discharges.
Last long layup with the Nissan and i had a completely dead battery after 29 days.
These little units will also run ipads and phones etc. Supposed to hold charge well and lose charge at about 2 percent a Month so charging is recommended at 12 month intervals. NOCO is a premium brand not like so many unknown names and the price is very low this week.
Sold as B grade but every time i bough a B grade product, it has been brand new unused with a little bit of box damage