I want to build a small portable solar
charging cart, however I have several questions or concerns about my idea. I have a general idea in my head but I would like to hear your thoughts and criticizms about it. I have not really put much thought into system specs like wattage or battery storage capacity yet, but it will probably be pretty small.
As for my general idea, I was thinking of a triangular shaped cart that will be built to match the ideal winter angle for our latitude here. The solar
panel (or panels) could be hinged at the top of the cart in order to adjust to our ideal summer angle. Adjustments could be notched or more of a fluid screw adjustment; however I think
notched adjustments would be easier and require less maintenance.
I thought it would work to use cedar tongue and groove boards as a way to protect the components and whatever tool batteries and usb devices are charging from water
The cart could either have 2 or 4 wheels, with removable handles to move it by hand, although it could also be pulled by a truck or tractor
We live in northwest Michigan where we can experience
6 months or more of freezing temperatures, which brings me to a couple of questions.
1. If I choose to use lithium ion batteries, when should
I remove them for storage, if I can't protect them from the temperature extremes?
2. Are there specific types of equipment that are preferred for winter usage?
3. Could I still use the panels to charge DC when the battery bank is in storage for the winter?
4. What would you do differently
Thanks to Dre for the giveaway of a great tool, which inspired me think more about this project
and cobble together some of my ideas. This will probably be a project for early next year. I still want to talk to a local
solar company, CBS Solar, out of Copemish Michigan to get their perspective and advice too.
Thanks for any input you have!