Step 1: The Goal
I wanted a universal power supply that would come in handy while away from any form of power. I complicated this quite a bit a first but have now posted what I had done when I opened it up to make some changes to the unit.
This unit provides 12v from 3 x7ah batteries and that is used to run the led lighting that we use around the camp site and charge our cell phones and iPads. I installed a 150w inverter into the box too making it more versatile and because I had a little inverter lying around
Step 2: The Beginning
I had an led voltage indicator kit lying around so that was the first thing that was thrown in.
The next was the little inverter that was under my work bench that was never used because it was modified sine wave and only 150w.
I had a few lead acid 7a/h batteries lying around too that had to go in it was just a challenge to see if I could fit 3 of them.
Step 3: The Outputs
Step 4: Inputs and Extra Outputs
Step 5: The Inverter
I just took the whole circuit and installed it into the box. I had to make a small PC board for the indicator LEDs, but other than that I kept it simple. It gets 12v from the batteries and inverts it to 220v that is available when switched on.
I also put a 230v meter to show when the inverter is on or if there is a problem.
The meter is connected to the output of the inverter
Step 6: Solar Controller and Trickle Charging
Step 7: Connecting the Batteries
The batteries are connected via a fuse to two spade terminals that I installed. The fuse is important as you can burn your wiring if you short something out.
Step 8: The Remote Switch
I love the feature this gives us.
We can leave the campsite and go and take a sundowner cruise on the boat and when approaching the campsite just turn all the lights on at the press of a button so you are not fumbling in the dark
Step 9: Closing Up.
Make sure you have good connections and use insulation and solder when needed.
Step 10: The Completed Project
The 50w solar panel
Led light strips for the tent and gazebo
12v fan (that is appreciated hectically on hot days)
Ultrasonic generator to chase away bugs ( I still think Tabard works better)
A 12v cigarette lighter adapter for things like iPhone charges and other small 12v powered devices.
Step 11: Being Used
We have used the unit every time we have gone camping since I made it and that was about 3 years ago.
I will hopefully get more into detail on my next instructable but feel free to ask me any questions or make any comments.
I love this website and have the app on my ipad and iPhone