Whistler Power Inverter - Answered Questions & Fixed issues

If the inverter is blowing your vehicle's lighter socket fuse, does it do it immedately or only when you try and operate a device? If its when you operate your device, it may draw more than 100-150 watts. This wattage is the limit for most lighter sockets. Double check the devices power requirement.

You haven't supplied enough information. An inverter only converts 12V DC to 115V AC. There are some battery packs with inverters, but that's not what you asked about. The time it "serves" is dependent on the load being connected and the battery(s) that the inverter is being supplied from. Go to a web site such as :http://www.donrowe.com/inverters/inverter_faq.html#hookup
You can learn a lot about inverters here.

Yes you can install 2 batteries for your systems and charged by your rv motor or exteranal charger.

Automotive batteries are usually adequate for small inverters, (< 500 Watts). When used in a car, we suggest you run the vehicle of your engine occasionally while operating your inverter. If you use the inverter while the engine is off, you should start the engine regularly and let it run to charge the battery. Deep Cycle (marine) batteries are best for larger inverters as they are designed for several hundred charge/discharge cycles. (Automotive batteries wear out much more quickly after heavy discharge).

What is the model number of the inverter? Most units the fans are thermostatically controlled and will run until the unit is cooled off.

It appears to be something to do with this https://www.google.com/search?q=keb+12f5+that+shows+E.EF+external+fault 7.13.1.6 External fault With Pn.04 "Ext. fault input selection", one or more digital inputs can be programmed which can trigger the error "31: ERROR! External input" (E.EF). With Pn.03 "E.EF stopping mode" , the response of the inverter to the digital input is defined. With Pn.65/ bit 1 "2: Pn.04 = E.UP https://www.keb.su/doc/Instrukciya%20F5-A_E_H%20ver.4.0%20(ang.).pdf ..

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It wants the password because you are changing parameters. https://www.manualslib.com/manual/2005049/Keb-Combivert-F5-Series.html?page=54&term=pass&selected=1#manual https://www.manualslib.com/manual/2005049/Keb-Combivert-F5-Series.html#product-COMBIVERT%2016F5%20Series

See page 32 troubleshooting of user manual. User manual Panasonic SC-VK825D (English - 112 pages) For further help, service manual is given here PANASONIC SA-VK825DGC SERVICE MANUAL Pdf Download ' ManualsLib

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