If you’re in the hot weather all the time you might want to boost that even double it up to 16 hours. Different fridges run a little different.
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Our fridge on average is running about 8 hours a day. And in cooler weather it might only be on for a few hours a day. In hotter weather that compressor is going to be on a lot more because that internal temperature is going to raise up a lot. So when that compressor is off, it’s not using electricity even though the fridge is plugged in. This is how the high efficiency fridges and the fridge in your house work.
![math input panel hard to use math input panel hard to use](https://www.digitalcitizen.life/wp-content/uploads/2020/10/math_input_panel_3.jpg)
That fridge when it’s drawing power, it’s powering a compressor and that compressor is only kicking on to cool the fridge down to a certain temp and then that compressor turns off. There is a lot of different components that have variations on this. Your fridge is going to be on and plugged in 24 hours per day in a camper van. So we’re going to say 47 watts for my fridge.Īnd I chose kind of a complicated component to start out with. So this calculator at the top, if you put your amps and your volts, it does a simple calculation and gives you your watts. That aside, we know that I have 3.9 amps and this is a 12 volt fridge. Now a lot of systems use amps just because that’s how 12 volt systems have always been measured in the past, and in vehicles it’s a good transition. It’s a more accurate measurement of how much actual electricity you have. Also some of the newer lithium batteries on the market (if you’re getting a custom Tesla battery or something), those are measured in watt hours. We like to use watt hours because it’s a more accurate estimate of actual power usage, because amps are determined by your voltage. In solar electrical calculations you can set everything up to figure out your amp hours or your watt hours. We have a fridge, and I know this fridge draws 3.9 amps. So in this case we’ll just kind of run through an example camper set up. Now there are some cases where for off-grid and storage and stuff things change a little bit, but for an RV or a camper van this is a good starting point. What we’re trying to figure out is our daily electrical usage, or our max average.īecause each day is like its own reset in terms of the electricity that you’re going to use. What you’re going to want to do is everything that uses electricity, you’re going to write down. In this case we have a list set up and you can add and delete component lines. The first thing that you need to figure out is all of the components that you’re using in your RV or camper van. So even if you’re not using this calculator itself, this is kind of the direction that you need to go. This calculator kind of walks you through the order that you need to figure things out in when you’re sizing this. It’s mostly plug and play and it’s pretty fun doing it on your own not only because you save some money and you can have a system sized exactly to what you need it, but it also helps you diagnose issues later down the road if you know what’s going on. So it gets a little overwhelming, but it’s not too bad. 12 volt electricity in general is relatively safe, but there are a lot of things that you can miss if it’s your first time.
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Now if you’re not familiar with working with electricity at all, you should probably have a professional or a mentor of some kind helping you through this.
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This is kind of just a guide for how to use the calculator itself and what some of the different numbers and that kind of thing mean. Now each of these different subjects in this we cover more extensively in a post on our site so if you’re not able to follow along or have some more questions about some details – those you’ll be able to find elsewhere in the electrical guides on our site. And some of the things that are covered in it. I’m going to talk a little bit about what it’s good for and what it’s not. This is for all you do-it-yourself (DIY) solar system sizing folks out there.
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And it’s our camper van solar system calculator. So this is in our solar and electricity guide. Hi there parked in paradise visitors! We have a cool solar panel calculator on our site and i’m going to walk you through how to use it because there are a lot of steps involved and sometimes just seeing someone go through it helps quite a bit.