Royal Power PIC3000-12 Power Inverter 3000 Watt 12 Volt DC To 110 Volt AC with 20amp Charger and Aut

• 3000 watts continuous power
• 6000 watts peak power
• 20AMP Built-in Battery Charger & 20AMP Automatic Transfer Switch
• Anodized aluminum case provides durability
• Heavy Duty

Ordered the PIC3000 on a Monday, received on Tuesday. This product has great features for the price. The little battery in my remote control is corroded. The user manual is unintelligible, "Be sure to right the screws in order to avoid connection loosened." The product description on Amazon mentions a transfer switch, but the manual and box do not mention a transfer switch. (There IS a transfer switch, but the manual is a generic inverter manual with a charger insert, and it doesn't match the PIC3000.)

I initially had trouble because the unit REQUIRES a battery in order to work. (Not sure why, it can be plugged into AC and it has a transfer switch.) If you plug the PIC3000 into the wall without a battery, the LEDs and display will not turn on at all. I wanted to test the PIC3000 before spending $200 on a deep cycle battery, so I was able to test with my car battery and an electric light bulb and clamped jumper cables. This test does not yield 3000 watts (the supplied cables should be used), but the charger LED lit up, and the light bulb worked off AC power when the PIC3000 was plugged in. When I pulled the plug on the PIC3000 (simulated power failure), the light bulb went out for a couple seconds, then turned back on from the car battery. [TESTING UPDATE, I bought a 90aH "Interstate" battery and plugged in my 5.2 amp sump pump. The sump pump ran every 15 minutes for a few seconds, showing 570 watts on the display, did not see a higher startup surge. The battery was at 12.8 volts after 6 hours, in line with expectations, should survive for for a few days at that rate with no other appliances attached.]

Tech support is very difficult with this seller. No phone number is provided with the manual or packing list. I got a phone number and email address from royalpower.com. I left phone messages that were not answered and my emails got no response. Since I believed the unit was dead, I initiated a return. This attracted attention. After asking me again for my phone number, I finally spoke with a support person about 24 hours later. He explained the setup and it works.

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The unit fried itself in less than a week without even being under load. The company was quick with return instructions, but since I retuned it they don't respond to messages and calls and I have absolutely no idea when or if I will receive the replacement I have been wating for for several weeks now. Don't ever buy anything from this company.

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Anybody requiring a battery backup system for anything, this works great. I have it for the sump pump system in the basement

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The unit was easy to hook up and I had my battery bank topped up in about 10 minutes. I tested the output and it works. The remote is handy since you can turn it on and off from another room to conserve battery power. This unit has the ability to run a refrigerator and a few small window air conditioners. I use this during storms to run my refrigerator and I have the ability to run a window unit at night and give my generator a rest.