Hello everyone, Relatively new to electrical engineering (my background is more in coding), so, thank you ahead of time for all your help!
I was tasked with creating an outdoor lamppost for an event at a campground (IE: no immediate electricity source). At first, it seemed quite simple, but, looking at the necessary requirements, it seems to be more complex than I thought.
I need to find a way to power a high-powered LED light bulb (ideally 12W equivalent) for 10 hours a day (for 3-4 nights - for a total of 30-40 hours) without immediate access to an electrical outlet. So, if I were to use my currently provided 12V, 12W bulb, it would be around 120 watt hours a day.
This battery source needs to be able to be outdoors, and face rain/weather. There may be a tarp, tent to cover it.
I may have access to a generator to recharge my battery source at another location if need be.
I currently have a bright DC 12V light bulb that would be ideal for this project, but, I could also use a AC light bulb if need be.
Connected 6V Lantern Batteries:
Connecting multiple lantern batteries together, and swapping them out on a daily basis. Walmart has a set of Rayovac Heavy-Duty Lantern Batteries for around $2.50 each. Each one of these batteries has around 5 ah (not the highest quality, but, they are cheap!)
- Connecting these batteries in parallel and series would give me the 20 ah, and 12v specs needed.
- It would come out to around $15 a day.
- Would be easy to put in a large water-proof container and connect to the lamppost
- Bit wasteful - I'd burn through around 20 of these batteries, and would have to recycle/dispose of them
- Sealed? - Unsure if I could put them in a waterproof container. Do they need venting?
- Mid-range cost: Would come out to around $50-60 due to the number of batteries needed
12V Deep-Cycle 20Ah+ Battery:
A simple 20ah+ deep-cycle battery would provide me the DC power needed on a daily basis. I would then detach it during the day, and bring it to the generator to charge.
- Cost - Relatively cheap, at around $50, this battery option would be affordable
- Set it and Forget It - No need to connect multiple batteries together. This would just be an easy wiring job.
- Venting - Unsure if I could place this in a simple waterproof container outside. Does it need to vent? Or, would a AGM deep-cycle battery be ok in a vent-free container?
- Recharging - Unlike the lantern batteries, I would need to bring this to a generator on a daily basis to recharge. Not the end of the world though.
I am vacillating between both options. Ideally I would like to go with the deep-cycle battery, but I am quite concerned with the venting problem. I don't believe the 6V batteries need to vent, so they could be placed in a simple container.
- Does one of these solutions stand out more to you as the better fit?
- Are there other battery solutions that you think would work better?
- Do I need to use a deep-cycle battery, or would something like this battery work?
Again, thank you ahead of time for any guidance you could provide!