SailNet Community - View Single Post - Which Laptops Has Survived Life Onboard?
View Single Post
Old 07-20-2009
hellosailor's Avatar
hellosailor hellosailor is offline
Yumm! Hot kraken chowdah!
Join Date: Apr 2006
Posts: 11,188
Thanks: 4
Thanked 118 Times in 115 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Dryclean, you might want to check the inverter power consumption ratings.
Most inverters are efficient only when running at something like 90% of their rated continous power.

So, if your laptop draw 20W (which I assume means 40W if charging and running at the same time) you might find that connecting it to a 75W or 100W inverter, actually draws significantly less power than connecting it to a 250W inverter. Possibly 1/3 to 14/ less power!

Then take a look at a Kensington or other direct 12-volt adapter for your laptop, and you may find that again, using a single 12-volt "car and place" power adapter draws HALF the power that you use with an inverter plus your regular laptop power supply.

Total difference? Could be 50-75% less power being used if you just use one correct 12-volt power supply for the laptop.
Reply With Quote Share with Facebook