What about getting a travel kettle and using instant?
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Instant? You can't be serious... I roast my own beans. Last time the power was out, I boiled some water over a propane cooker on the back porch.
Anyway, getting off the topic, and already hijack Hank's Dell thread this week.
There are a lot of other charge controllers available, and a few build your owns. The link I gave was one I bought and use. It small, inexpensive, and switches on the load at night. Just right for what I want to do. Most of what you will find are intended for powering more serious loads, and at a much higher price. That 5 watt model should be plenty, and could handle a lot more than 36 green LEDs if you want, or add some different lights later.
You can add batteries in parallel for more capacity. Not 100% sure about if its okay to mix capacities. Mine is 2 x 5 Ah SLA (had them sitting around). I've got a 12 Ah recently, and seems to hold a charge well, but haven't hooked in up yet. Have to see how much my 12 watt panel can handle charging in a day.
I don't remember your location, but you probably don't need a 12 watt panel, maybe 5-6 watts for here in Florida. I paid $114 shipped, for mine. It seemed like the best deal for what I was looking for.