An inverter does not hold charge, it simply transforms 12v to 120 in USA.
An 8w 1A 12V PD should last at least 35 hours on a standard 35A car battery before the batt is dead as a ghost !
this kind of thing http://www.easygates.co.uk/cart/Details.asp?ProductID=138 would be a cheap solution but to charge it youd need a seperate home charger or a charge splitter installed in car.
This is your best solution IMO or one of a number of similar yokes
http://www.amazon.com/Black-Decker-BB7B-12-Volt-Battery/dp/B000H774BY,
For serious 12v stuff a deep cycle battery is best, but expensive. car batterys are made with lots of thin lead plates, when you empty one of charge the plates twist and deform... batt fucked. DC and leisure batts are made with stronger plates so u can empty and recharge them for years. car batts are designed to be kept full.
http://www.amazon.com/Black-Decker-StormStation-Rechargeable-SS925/dp/B000B8GBCC/ref=pd_sim_auto_6
and your ready for anything!
PS Ive been running my home 12V solar/wind system for 13yrs, been through plenty of batterys!
An 8w 1A 12V PD should last at least 35 hours on a standard 35A car battery before the batt is dead as a ghost !
this kind of thing http://www.easygates.co.uk/cart/Details.asp?ProductID=138 would be a cheap solution but to charge it youd need a seperate home charger or a charge splitter installed in car.
This is your best solution IMO or one of a number of similar yokes
http://www.amazon.com/Black-Decker-BB7B-12-Volt-Battery/dp/B000H774BY,
For serious 12v stuff a deep cycle battery is best, but expensive. car batterys are made with lots of thin lead plates, when you empty one of charge the plates twist and deform... batt fucked. DC and leisure batts are made with stronger plates so u can empty and recharge them for years. car batts are designed to be kept full.
http://www.amazon.com/Black-Decker-StormStation-Rechargeable-SS925/dp/B000B8GBCC/ref=pd_sim_auto_6
and your ready for anything!
PS Ive been running my home 12V solar/wind system for 13yrs, been through plenty of batterys!