What size inverter do I need?
Our Casita trailer has one Duracell AGM battery and a 100V Renogy portable solar panel. By 11 AM, the battery is typically 100% charged so we don't use all that much (I presume). Inside the RV, we u...
Forum Discussion
jornvango wrote:
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Now ... for charging my laptop while we're traveling, I bought a (cheap) 400W inverter at Walmart to plug into the RV's 12V outlet. Since the laptop charger is 90W, the solar panel barely keeps up while the laptop is charging during the day, but it works fine.
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Jorn
The laptop needs 90 watts to charge and that is a fixed variable, but you could find a 12V charger for your laptop to plug into the Casita's 12V outlet and leave the inverter out of it. That takes away the conversion loss associated with inverter efficiency. This is hardly going to save the day, but just something I wanted to point out. Doing it the way you're doing it, you're converting 12V DC to 120V AC, then converting 120V AC to whatever the laptop brick does (probably 19V DC?).
