Hey everyone! I recently set up a small greenhouse, but it's a bit far from any 120V power source, so I'm looking to power a 12V water pump, like the ones that connect to car batteries via alligator clips. I'm considering using a 25-watt solar panel, a charge regulator, and one car battery to make this work. Is that enough power? I know it may sound like a beginner question, but I really have no experience with solar power systems. To give you an idea, I'd only be using the pump for about 5-10 minutes each day.
3 Answers
First off, you'll want to check the wattage of your pump. For instance, if it’s a 50-watt pump, it would use that much per hour. On a sunny day, a 25-watt panel can produce around 100 watt-hours, so it might just cover your needs. Also, instead of a car battery, consider a 20Ah LiFePO4 battery; they’re more efficient and easier to manage. Just make sure your battery can support running the pump for at least an hour if needed!
Before you dive in, consider if you’ll need other equipment too, like a greenhouse fan. From my experience, having a fan can really help in managing pests and air circulation. I’ve got a small fan in my greenhouse, and it works wonders! Just something to think about as you set everything up.
You might be on the right track! A 25-watt solar panel could give you enough power; it might generate around 75-150 watt-hours daily. That should definitely run your pump for a short period like you mentioned. Just keep in mind your location and seasonal sunlight availability; if you're in a really sunny area, you should be fine!
Great point! I hadn’t thought about a fan, but I can see how it would help with those annoying pests. Thanks for the tip!