Good size, fan is not very noisy and other users indicate longivity with Xantrex products.
I have only used the unit two times; first to see if it worked via cigarette lighter, and second to hook up a Milwaukee Power tool charger for recharging a M18 Lithium-ion battery (Xantrex hooks directly to auto battery via clamps). Worked great!
With 320 continuous watts (400 surge) the unit had no problem meeting the requirements of the Milwaukee charger (300 continous watts). Before I purchased, I called Xantrex to get their opinion on the model and my application. They said it shoud handle it with no problem. It took less than 30 minutes to recharge a battery that was half discharged (M18 batteries have 4 indicator lights to let you know what's left). I watched it carefully to make sure nothing got hot since it was 97 degrees in the garage but the unit never indicated warm to hot air at the fan exhaust. It didn't drain the auto battery much during the 30 minutes.
Very Impressed ... a solid recommendation. Get more detail about Xantrex Technologies 851-0401 XPower Plus 400-Watt Inverter.
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