That's almost certainly correct if you can get one free and as long as you don't need to lug it about. How much does a 60-120 watt solar panel cost? That sounds VERY expensive relative to the cost of the pi and the ~20p a month it costs to power it constantly.r4049zt wrote:I suspect that a used 60Ah car battery could be better value and better Ah than a specially bought 10Ah 12V battery which the 3rd post here correctly advised. I have not proven that yet, but will post when I have.
Hmmm... Yes. This might what I need. I'll take a careful look at this.holmez wrote:Perhaps you should have a look at this thread from the Networking and servers forum.
The basic conclusion was that a 14W solar panel + a deep cycle leisure battery might be sufficient.
Looking at differences in consumption figures between when we're away from home (couple of months per year) and at home, it looks very much as if our fridge is nearly half of our electricity usage. (Although we don't use a lot). The next one we buy will be super-efficient Over its lifetime, it will be worth it.CCitizenTO wrote:I have to say it's a good example to show how much power our modern conveniences require to operate.
If it takes that much to fire up a RPi just imagine how much your Refridgerator or AC unit is guzzling.
More like 7kWh/day, but nearly half of it seems to be fridge-freezer. I think a new one might be in order. Solar-powered of course - to stay on topic. Maybe I can use a Pi to control it.r4049zt wrote:If your household small ac appliances use less than 2kWh per 24 hours then you are doing better than most of us. For example a sky broadband box chomps through more than 1kWh per day.
A fan on a car does not work because the fan itself is driven by the cars motion and the fan only adds drag to the car. (If I remember right thats like the third law of thermodynamics).jarodium wrote:Wind turbines and solar together.
I'm about to go off topic but I did thought of this applied to a car. While getting solar power from panels and while the car is moving wind powered dynamos inside the car would provide an extra energy boost...
Now that I'm thinking of this, a childrens pinwheel attached to small dynamos could, I just thinking loud, providing extra juice for recharging the battery...
What do you say?