Timesheet Calculator Excel. Some days I might not be running my laptop, some days I might be running a little more. Hence the large batts. We use this a 4 generally for camper vans because if you’re flat mounting your solar panels on top of your van, in most cases they’re only going to see about 4 direct hours of sun. I have looked for 10 gauge ends to crimp onto the end of wire that will fit into the holes but have had no luck. thank you! And it’s our camper van solar system calculator. And the cell booster, that thing is only running about 2 amps so like 24. per day - Draws, {Time - DVD Player:155:value} hrs. Jump To Solar Wiring Diagrams. A 100W solar panel plugged into a PWM controller will not be putting in 100W of power to your batteries. This is the maximum power you will expect to use on any given day. Solar 260W (360W) There’s no reason to do that. Figure out your monthly payment with the calculator below. Any of my wire runs are no more than 6-8 ft… so #12 AWG should be fine for wiring, but I’m way confused on this current/amp boost that will happen between CC and batteries in a 12 volt system??? Before selecting your inverter, it’s important to learn a few electricity basics. This is another generous thing, give yourself some wiggle room here. One great way to extend battery life is to install a Samlex Solar power kit on your RV. Click here to go directly to the Off Grid Solar Load Calculator. Enter the quantity of each appliance by entering a value in the form field. For a 12V battery bank, this will be between 13.5V and 14.8V depending on where the batteries are at in the charge cycle. I love a good spreadsheet/ calculator and was having trouble pinning down what i need for my campervan! You kind of get a size difference there so you can either go with a 185 amp hour lead acid style or a 115 amp hour lithium battery. See below for details. With that said, it’s usually a lot of work to add more panels on the road so we like doing them all at once. If you still don’t know how to find these numbers, read our article on calculating your power usage for each electronic device for some tips and real-world examples. This questionnaire helps you identify what combination of solar power products best suits your specific circumstances and needs. How to calculate slid fan load wich have 3 setting for example 1,2,3. So once you have your battery, your power storage, you know your power storage can discharge a full day’s use, you can always boost that if you want. No! Jump To Frequently Asked Questions There is more detail in this in our charge controller article if you want to know. 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.  40A MPPT (premium), Batteries  WindyNation 100W Solar Kit (PWM charge controller and battery included), Solar Panels Start by writing down every appliance on or in your RV that you want to use with your solar set up. per day - Draws, {Time - 12V TV DC:145:value} hrs. The first thing that you need to figure out is all of the components that you’re using in your RV or camper van.  200Ah (x1) Battery (AGM option) Assuming we get 5 hours of direct sunlight, we know a 100 watt solar panel will produce 30 amp hours per day.. For our experiment, 5 hours of direct sunlight without clouds x 6 amps generated per hour = 30 amp hours per day that the solar … Enter in the daily usage for the following appliances to see how much energy is used. Estimated Watt Hours I have included some sample numbers simply fill in the areas with green shading and let the orange ones do the calculation.  Renogy 100W Solar Kit (PWM charge controller) Thanks for your work, its the best place for information I have found. So I don’t need anything more than a 200 watt inverter. Living in a van requires cutting down on unnecessary electronics as much as possible. This is just one … At first I was gonna run 2 battery banks (as I don’t have same batteries/ ages/use cases, types) but this build is turning into a nightmare (even though I can isolate them for charging – but only PWN chargers can I find with dual battery outputs that never charge simultaneously – bad for different batteries). Maybe you’re having an electrician help you install this or maybe you want to share it online with someone. Battery life is affected by how quickly you are using power. 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. per day - Draws, {Time - Coffee Maker:157:value} mins. This is based on your battery size and is a recommendation of max discharge rate from your devices. If you want more information on electricity, head over to our electrical home page. On-grid solar system involves solar panels and inverter. So as you’re picking one out it’s ok to look at the specifications on this. Write down the output wattage. The voltage of the solar controller is the rated output of the controller. You’ll notice that changes your solar panel size calculation. Umm… New guy here, but I thought I might point out an error. RV or motorhome solar panels work in the same way a residential solar installation operates: solar panels capture sunlight and convert it into electricity, and you can use that solar electricity to power appliances. Now one thing I forgot is the laptop and the Macbook are both running off of AC power. Call us : 021 789 0929 Mail us : info@gwstore.co.za And then we have recommended components for those specific sizes. You may also receive an express consent notification to opt-in to our newsletter. Now the other selection you have to do here is whether or not you’re using a PWM or MPPT controller. Laptops are another variable component in that they’re only pulling their max watts. We recommend calculating both your summer and winter numbers. Is it to account for solar panel power output during sunrise and sunset? Solar Load Calculator For Off-Grid and RV Solar Power Systems; Free Solar Panel Calculator For Off-Grid&On Grid Solar Systems; Free Solar Cable Size Calculator; Free Solar Battery Calculator: Calculate Fast & Easy The Solar Battery Bank Capacity And The Number Of … As you can see, if you run everything DC powered your efficiency is going to be higher in terms of how much power you’re getting out of that. The size of your system is directly related to cost. Visitor address. You should label your ports on the controller diagram so someone doesn’t put the battery in the LOAD port on the common Chinese controller. You’re looking at the formulas, I assume? Choose the amount of time that appliance would typically be used on the bar to the right. This electrical usage table will have a number of rows equal to the number of electrical components we use on a typical day.The first column is the name of each electrical device. Thanks for the great article. per day - Draws, {Time - Propane Alarm:151:value} hrs. How often does a group of women get to renovate and redesign a travel trailer? Remember to check the requirements of your specific charge controller to make sure it will work with your panels before buying it. If 300 watt diag (for example) you would have 12v X 3 = 36 volts. See the FAQ for further reading on running a larger inverter. Are there losses with multiple batteries?  Adjustable tilt mount (optional) It is difficult to predict how much wiring each different van build will have and the lengths needed, and we don’t want to have you ordering things that you don’t need. Permits, guides and interconnection provided. As a general rule, smaller inverters are more efficient. Hey Andy, for winter camping, adjust the list of devices and number of sun hours. 1-98 Amps . Your battery can be either AGM and FLA (those are both lead acid battery types). Say you’re going to travel around sunny climates somehow, maybe you’ll see 7 or 8 hours. Copyright © 2020 Go Power! I meant to post it here. But in general, if you’re going to go significantly larger, you’re going to want to double check your battery bank size. 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. A 12-volt battery can be charged from the alternator of a vehicle, a solar battery system, or through the electrical grid. If you’re changing locations frequently, we like to use 3.5-4.5 sun hours for winter. We spent over two years living in a DIY camper van and visiting 48 US states. Oops…. mobile power equipment recommendations based on your specific power usage.. At Go Power!  Solar panel roof mounting z-rack (optional) Great site! The numbers you’re looking at function in this purpose.  Battery isolator (compatible with lithium) So you’ll notice your battery bank size changes significantly based on your depth of discharge. Don’t underestimate cloudy days! Regards, Get. I have the same solar charge controller shown in your diagram, but I can’t find the specs for it. If you run an AC powered object like my laptop, then that efficiency is going to be reduced so you’re going to have to use more energy to charge the laptop than you would if it were DC powered. Sometimes in some cases there are much more expensive but only slightly better components that we don’t find necessary. You’re not going to want to run a coffee maker and you’re not going to want to run a toaster oven like I said. Also, for the 3 fuses above the positive battery terminal, I purchased 40 amp fuses. While doing that, add up everything, right from devices like microwaves, cooker and lights to … With the beefy internals, I figure, I can add more panels and batteries later.  600W Pure Sine Wave Watch the video below if you’re not sure how to fill out the calculator. If you have things like toasters, if you have things like blenders, you’re going to see how quickly those things add up your electricity. This is kind of our general advised minimum. How much Solar do I need for my RV? Our fridge on average is running about 8 hours a day. Ideally you would want to impact or drain the battery as little as possible as it has a direct impact on the number of … First, Thanks for sharing your knowledge. Read our wiring guide for more details on how to size your specific system.  Wires and fuses*, Alternator Charging (optional – choose one) And this fridge is running straight off of our batteries. In this case we have a list set up and you can add and delete component lines. If we’re ok with discharging it up to 50% we can drop that down to a 185 amp hour battery. The CC takes that fluctuating energy and turns it into a tame charge voltage that the batteries can handle. Certain circumstances benefit from wiring in parallel, but our default is to wire in series. You might find that helpful. You kind of want to make sure that those are running efficiently. What we’re trying to figure out is our daily electrical usage, or our max average. A lot of people will run off the load terminals to the fuse box. Generators can also be used, but you’ll trade your electricity costs for fuel costs. So you have to account for that efficiency when we’re counting how much energy we’re using. If you do that, you’ll start reducing their lifespan significantly. Hope that helps! We are Kate, Ian and Harper. So if I’m running a simulation, a 3D simulation then that thing is going to be pumping out 150 or 170 watts. Appliance Qty. An Unbound Renewable Energy Company Open Mon … If you have an angled system, so you can tilt mount your panels towards the sun, you can boost that up to 5 hours. Once I stumbled upon the #buslife, it. Download excel solar panel calculator calculator spreadsheet calculator online for free. At first I thought 20 amp CC was good enough 18 volts x 2 = 36 volts (series) and 5.5 amps x 2 = 11 amps (parallel) into the CC… but everywhere I’m reading seems to indicate I’ll somehow be shedding massive volts down to 14 +/- 0.5. per day - Draws, {Time - In Wall USB:150:value} hrs. The problem with that is then you also need to make sure you have enough panels to run that once is does drop for two days worth of use. I recharge with a NOCO GENIUS that i hook up and plug in at work, which is an amenity they allow, a grace of God really. ELECTRICAL LOAD EVALUATION CALCULATOR AND SYSTEM DESIGN INFORMATION. Consider adding more batteries to increase your off-grid capacity. You are running short by. Thanks for the comment, it shows you understand the Amps x Volts = Watts equation. Say hey, here’s all my numbers, this is my daily power usage. Not to mention fans and other incidentals, and losses throughout the system.  Battery isolator The remodeled unit is set, For RVers and boondockers, microwaves and other off-grid appliances provide many creature comforts of home. Please indicate how many of each item you have, and how long they would typically run per day. I’m resizing now due to an oversight in my original plans. So that’s why we have this choice in here. Thanks Ian, I did not know that the CC would step down in those cases. Most people are going to be going MPPT unless you’re on a heavy budget or really running the numbers to get the most efficient system possible for your dollar. per day - Draws. You are welcome to play around with this number, and even combine it with your winter/summer total watts to see what a comfortable system size is for you. Awesome! RV Solar Calculator 1st May 2014 by Joshua Holmes. Hi power magnets with screw in eye bolts worked well for me. So sometimes smaller systems, say in this case, let’s say you find a couple of 150 watt hour panels 160 watt panels – if you go 300 watts of solar and a PWM controller, you’re going to be paying less for more power than if you were to go with an MPPT controller. 21 Gallery of Solar Sizing Calculator Excel. The charge controller can do this with 18V or 24V or 36V or a range of voltage inputs (depending on the controller) and use it to charge 12V batteries. See what is drawing the most power and look at ways to reduce or eliminate it. You show the loads directly tied to the battery. And or a rv solar calculator excel that helps explain this from each unit high powered. Or run off of AC power list set up discharge rates, you ’ re not sure to! Solar watts to charge your batteries in series is slightly more efficient hours or your watt usage! 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