You can also do this with a Zojirushi water heater, you get the water up to temp on mains power, than use batteries to keep it at temp. It's a triple thermos so you need very little power input to maintain it at 90 degrees, mine's rated for 17W power use. Downside is that you can't buy them in NZ, you'd need to import one from Japan.
Thanks for your responses. It appears at this stage that generally-accessible technology is not available for a fully-powered portable AC. Technology is not as advanced as I thought. I'm sure in the future it will, that they'll find a way to store more power in a possibly yet-to-be-invented power storage unit. The other angle would be to find a miraculous way to boil water with little power. Then you could have a USB-powered jug you could plug into your portable laptop. :)
Thanks for your responses. It appears at this stage that generally-accessible technology is not available for a fully-powered portable AC. Technology is not as advanced as I thought. I'm sure in the future it will, that they'll find a way to store more power in a possibly yet-to-be-invented power storage unit. The other angle would be to find a miraculous way to boil water with little power. Then you could have a USB-powered jug you could plug into your portable laptop. :)
Ehhh it's not so much advancement of technology preventing something that matches your request, than it is basic physics. Water has a huge heat capacity - highest of all common substances. To boil 1 litre of water from room temperature takes the same amount of energy required to run a light bulb for almost 5 hours.
That's just 1 litre. You'll need dozens or hundreds of litres for a cafe for a day. There's also the energy lost in the inverter to convert from DC to AC. There's a good reason why the hot water cylinder is the biggest power consumer in a house.
Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly
to your computer or smartphone by using a feed reader.
Trusted
