12VDC to 9VAC - How to do it? Anybody?
I live off-grid. We all know how inefficient the inverter is. It's a huge drain on my battery bank, won't function when they get below a certain voltage, yet all my peripherals that operate directly from the battery bank, operate fine.
That being said, I have been trying to come as close as possible to eliminating the inverters and I have two peripherals left: 1) cordless telephone and 2) modem
The problem is that they run from that pesky wall charger/converter from 120VAC to 6.5 and 9VAC respectively. Now, notice these units run on LOW VOLTAGE AC, not DC. That is, they are powered by the AC. My guess is that inside each unit, there sits a rectifier converting it right back into DC. In fact, for the phone, I see no other way because it charges a NiCad battery.
So.... does anyone have an inkling as to an efficient way to convert 12VDCD to low voltage AC. Preferably variable, but not absolutely necessary.
There is nothing on the market that I have found. So if you're looking for something to have to break into the electronics market with, here ya go. I'll bet there are hundreds of thousands 'off-gridders' who would want this technology.