Cotillion
Well-Known Member
What will roughly be the battery drain using my laptop through an inverter?
Inverter usage
- Thread starter Cotillion
- Start date
sarabande
Well-Known Member
Laptops usually run at around 19v and 65W from the mains adapter depending on screen size and CPU activity. If inverters are 80% efficient that looks like 80W at max draw. Say worst case 6A from a 12v battery , less if the battery is well charged.
An alternative is to buy a 12v "car" charger for the lappie, and run it directly from the boat battery.
An alternative is to buy a 12v "car" charger for the lappie, and run it directly from the boat battery.
PaulRainbow
Well-Known Member
RichardS
N/A
That is the best solution provided that your laptop will allow it. If the power plug which goes into the PC has no centre pin, then you will be able to find a suitable 12V adapter. If it has a centre pin, you need to do more research online.
Richard
GHA
Well-Known Member
Depends on the manufacturer, Dell istr have a chip in the charger talking to the laptop via the centre pin using i2c, HP use the centre pin to measure voltage drop along the charging cable & calc current from that but still charges fine unconnected.
duncan99210
Well-Known Member
The 12v laptop power supply I’ve got lurking somewhere came with about a dozen different tips to fit just about any laptop. Switchable voltage as well. I used it for several years until we migrated to iPads instead of laptop when we’re aboard the boat.