rv solar calculator excel

Thanks for doing all the workings out for us!  Electrical wire crimp connector Meaning that you get the same amount of theoretical power from two 100W panels in series as you do from two 100W panels in parallel when using an MPPT controller. per day - Draws, {Time - Laptop:162:value} hrs. 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. You can put your location in a site like this: https://unboundsolar.com/solar-information/sun-hours-us-map to find the average sun hours per day. Go with the smallest inverter that you will need with a bit of wiggle room. Just want to charge some phones at night and make coffee in the morning. So in this case, I have two 90 watt DC powered components in my system. The actionable difference lies in efficiency. There are many differences between these batteries. *Fuses and wire gage size are going to vary depend on how long your are running the wires. I think that thing was pulling 2.9 [amps]. But the main difference (as it relates to this calculator) is the depth of discharge – or DOD. And on days I do get it, I can put out my 5th portable panel and dump 20 AMPS an hour into the lithium’s when I can. per day - Draws, {Time - Coffee Maker:157:value} mins. So if you notice when I deselect these DC numbers I’m not running anything off of household power (AC power). If I use this to calculate, would I just halve the Ah needed for the battery for a 24v setup? MPPT controllers are more efficient so you need a little less solar panels to get to your watt hour usage. The best option is a battery to battery charger, many of which double as a solar charge controller. If you have a 100Ah battery and you use 50Ah, then your DOD is 50%. So this is where that [inverter] number is coming from. Warning: this calculator only takes into account only solar panel losses due to temperature, dirt, etc. per day - Draws, {Time - Satelite dish:156:value} hrs.  Battery terminal connectors Thoughts? What it’s doing is also charging your laptop battery. If you’re ever going to run a power tool just get a battery powered one or run off of shore power. We have a fridge, and I know this fridge draws 3.9 amps. Hope this helps! Solar kits normally come with solar panels, a charge controller, and z-brackets for mounting. RVs … My wife’s laptop is a Macbook and she’s not running as much high processing powered things. I would then use the CC to step to the 12v needed to charge the battery. If it’s not even charging the battery, if it’s just plugged in and idol it’ll be down in the 50 watt range. 100Ah (x1) Battery (Lithium option).  600W Pure Sine Wave Again, we go through all of this on our charge controller post if you want to know details. I’m WAY over powered as I only use 3 low wattage fans and recharge my tablet and phone. One great way to extend battery life is to install a Samlex Solar power kit on your RV. So I use about 8 amps to run my laptop, second monitor and play music. These are just to see which size components and how you want to plug everything together. Select whether your device is DC powered or will be using an AC inverter. all I want to do is run a 12″ inch 120v desk fan when I go to sleep in my minivan. In your controller diagram you show the BATT as being the far right terminals of the PMW controller. I might pick up a 400 watt inverter just because they’re easier to find, especially ones that plug into the batteries. Then build your system to the largest number. Is there any reason I cannot simply connect the solar to batteries outside the camper, and connect the Shoreline to the inverter? This really helped me calculate what setup would be needed. This would make your input at 18V and you would be getting more advantage of a PWM controller without loosing significant power. You might find that helpful. Charge Controller Size February 21, 2019 by Role. do you have any information for using three inputs? Despite having 400 watts of panels on the roof, on a cloudy day I’m lucky to make 4 amps, less if the clouds are extra thick and nothing if raining. Alright, so when you’re done with all of that. That aside, we know that I have 3.9 amps and this is a 12 volt fridge. We fund our effort and research through affiliate links and advertising, so just by being here and using the site you’re thanking us. Now because of this, my laptop is only plugged in and charging about 2 hours per day.  Renogy 200W Solar Kit (MPPT charge controller) If we’re ok with discharging it up to 50% we can drop that down to a 185 amp hour battery. That basically is just saying hey, you can save a lot of money and efficiency by not running an inverter. By answering these simple questions, we can estimate the size of your system in a few moments. Now the one thing we don’t really list is the wiring because everyone’s wiring is going to be a little different. “12V” solar panels typically output between 18-22V, which fluctuates based on external factors (sun, temperature, angle, etc). Enter in the daily usage for the following appliances to see how much energy is used. Thanks so much for the thorough diagrams! Click the to add a new row. This is a helpful starting point for me to figure out what I need. So after your battery, the next piece of equipment that you choose is your solar panels. 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. We see this common mistake pretty often. So this calculator at the top, if you put your amps and your volts, it does a simple calculation and gives you your watts. Visit our Electricity Main Page to see all of our camper van electrical posts. These are example numbers, I don’t actually remember exactly what the vent fan is but the numbers are out there somewhere 35 [amp hours].  Wires and fuses*, Solar Panel Kits  WindyNation 100W Solar Kit (PWM charge controller and battery included). Say you’re going to travel around sunny climates somehow, maybe you’ll see 7 or 8 hours. Your email address will not be published. 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. 1. We recommend reading our post on charge controllers for more information. Solar Panel Sizing Calculator Xls. There’s a lot of little details. Solar Sizing for Your RV. What time of year do you use the RV or trailer the most? This section helps us identify how much power your DC appliances use in your RV or trailer. The input depends on many variables but is generally always higher. per day - Draws, {Time - Coffee Maker:159:value} mins. We’ve done tests on it, we can see the average. But smaller inverters are more efficient. Ok, next up is the inverter. I wish I had come across this 2 years ago when I was building out my van and trying to figure out all this stuff. Change values in the boxes with arrows and the calculator will adjust to show you other system specifications: Inverter Input Inverter Power Rating Inverter Output 12VDC 24VDC 48VDC 120VAC 240VAC Max Voltage Drop %: Continuous Watts: Watts: Cable Gauge: Amps: Cable Length: Cable Length is the total positive and … This calculator is meant for camper van conversions, RVs and small off-grid solar systems. I am looking to do the 400 watt hook up, I understand how each component is to be placed but what I am having trouble with is the size of wire to use from the solar panels to the Battery bank, and then to the fuse block to run for the lighting and plugs to power some of the equipment like the cell phone and laptop. The first thing that you need to figure out is all of the components that you’re using in your RV or camper van. And some of the things that are covered in it. See the FAQ for further reading on running a larger inverter. The remodeled unit is set, For RVers and boondockers, microwaves and other off-grid appliances provide many creature comforts of home. There’s a lot of benefits to lithium batteries. Either way works, it doesn’t really matter. 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. You have {Batteries:89} but your draw is {Adjusted Amp Draw:84} amp hours per day. This is my first solar project. ELECTRICAL LOAD EVALUATION CALCULATOR AND SYSTEM DESIGN INFORMATION. There is a lot of different components that have variations on this. NREL's PVWatts ® Calculator Estimates the energy production and cost of energy of grid-connected photovoltaic (PV) energy systems throughout the world. the system can recharge the batteries the rest of the day. If I am consuming a certain amount of power throughout the day, then the solar panels alone must be able to source that power. So we mitigate for that effect by estimating more solar. So we have this calculator here. Generators can also be used, but you’ll trade your electricity costs for fuel costs. Because each day is like its own reset in terms of the electricity that you’re going to use. Your fridge is going to be on and plugged in 24 hours per day in a camper van. Because of these discharge rates, you will need a larger AGM or FLA battery for your system than you would with Lithium. So an FLA battery can last 8 or 10 years, if you discharge it past 50% every day you’re only going to get about 2 or 3 years out of it. Read our article on inverters for more information. That's why we have a simple formula for calculating your daily wattage in your RV or travel trailer that will help to size the proper solar kit for you. You are running short by. 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. Not really necessary in the larger set ups because your battery is better at handling that load anyway. Victron Energy B.V. De Paal 35 1351 JG Almere The Netherlands. There’s no problems with going more solar. As a side note, the discharge capabilities of lithium batteries are significantly better than those of AGM or FLA. AGM and FLA batteries should only be discharged up to 50%. You can buy specialized portable solar panels designed to be easy to set up and take down for RVs… This is nice to print off to show people. Suggestions? We recommend calculating both your summer and winter numbers. *Fuses and wire gage size are going to vary depend on how long your are running the wires. – I will check out your charge control article next. PWM controllers don’t have the ability to “step down” voltage, they essentially just throw it away. Also, is there a good way to get power use estiments for devices?  WindyNation 100W Solar Kit (PWM charge controller and battery included), Solar Panels By using this form you imply consent for a member of our Customer Service, Sales, and Technical Support teams to contact you regarding your inquiry. Excellent page guys, nice work. They will run off of a 30 amp power cord or a 50 amp … Maybe you’re having an electrician help you install this or maybe you want to share it online with someone. Timesheet Calculator Excel. Write down the output wattage.  75Ah (x1) Battery (AGM option) Step 1 – Calculate your RV electrical power requirements 12 Volt Appliances. 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. Is some type of rubber flex system a good idea?  200Ah (x1) Battery (AGM option) per day - Draws, {Time - Other AC:315:value} hrs. These diagrams are designed to be understood by a beginner for a safe and effective install with readily accessible components. Notes and Terminology: DOD – Depth of Depletion – The amount of amperage taken out the battery on a daily basis. The voltage of the solar controller is the rated output of the controller.  Renogy 300W Solar Kit (PWM charge controller) Absolutely, and it is recommended to supplement any solar system unless you plan on driving infrequently. You can read more about batteries here. If you don’t have any AC electronics you do not need an inverter, saving some money and efficiency.  Solar panel roof mounting z-rack (optional) So in my application, I have a 12V motor that will use 12 amps (144 watts) for 8-10 hours a day. So this is in our solar and electricity guide. The watts that you’ll see on that power brick when they’re charging the battery and when they’re running high processing things.  1500W Pure Sine Wave, Additional Parts PWM charge controllers are much cheaper but less efficient than MPPT technology, so they take more minimum solar watts to charge the batteries. These would generally be items you would have installed yourself, or brought from home. per day - Draws, {Time - Furnace Fan:147:value} hrs. I can’t connect the inverter to the van’s battery for obvious reasons. And those don’t even need to be charged up all the way at the end of each day. Roof space to mount panels – Even the guys with the biggest budgets will have some finite amount of rood space. So it gets a little overwhelming, but it’s not too bad. How often does a group of women get to renovate and redesign a travel trailer? And that thing is running about 5 hours per day. The most I’ve ever seen it pull is 150 [watts] and usually it’s closer to 120 [watts]. Charge Controller But if you’re using your RV, you will need more. 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. And thanks for all the great detail in your excellent guides!  100Ah (x1) Battery (Lithium option), Solar Panel Kits calculating your power usage for each electronic device, Here are some tips to cut back on electronic use, Best 12v Inverter For A Camper Van Conversion, Battle Born Lithium Batteries Review LiFePO4, How To Install A Battery Isolator In Your Conversion Van, Installing A Battery Monitor In A Camper Van Conversion, https://www.parkedinparadise.com/cassette-toilet/, https://www.parkedinparadise.com/portable-propane-water-heater/, https://www.parkedinparadise.com/best-roof-vent/, http://www.smartgauge.co.uk/batt_con.html, https://unboundsolar.com/solar-information/sun-hours-us-map, Optimizing Your Camper Van Electric System, How To Calculate Wh For Each Electronic Device, over two years living in a DIY camper van, Select whether it is an AC or DC powered (AC uses an inverter), Choose which battery type you want to use, Enter your estimated sun hours (direct sunlight you expect on the panels), Aim to use as many 12v DC powered electrics as possible, Cook efficiently – fuels like propane and butane will make your system smaller than cooking with electricity. Hello! Don’t underestimate cloudy days! Or a refrigerator that cycles during the day. The battery is essential for the system, not just to store energy but to create a balanced energy source (rather than the erratic energy that comes from the sun). This website is fantastic! So once you have that all figured out, how do you put it all together? This calculator may come in handy when you buy solar panel (s) for your RV vehicle, boat, camper or home solar system, and you want to get a real estimate for the production capability of your solar panel (s).  6 way fuse block + bus bar But with a 20% discharge you need a lot bigger battery if you’re only going to be discharging it the same amount. If you have sleep apnea and you have a breather that you need on you, you can boost your battery size to make sure that you have juice to run a few days without recharging. They are also quite a bit more expensive, but they last longer. I’m going to talk a little bit about what it’s good for and what it’s not. You want your solar panels to handle all of the charge throughout the day of your usage.  Solar panel extension cable per day - Draws, {Time - TV AC:154:value} hrs. NOTE: This calculator is intended for helping us design off-grid solar systems. Your batteries do need to be able to be charged all the way as well so you can’t get too big of a battery bank or else you’ll start losing some of the charging efficiencies and your solar won’t be able to charge up those last few steps. For instance, if you need 150W of power, but your system is only 75% efficient, then you would need 200W of panels to get 150W into the batteries. Your AC fridge may draw too much power to rely solely on solar. RV Solar Calculator. And this fridge is running straight off of our batteries. 2 years later I’ve learned a lot too! per day - Draws, {Time - Cell Phone Charger:153:value} hrs. You are probably still planning to use power like you would in a house.  Flexible polycrystalline, Batteries This calculator is meant for camper van conversions, RVs and small off-grid solar systems.  Battery monitor (optional) 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. Now in this battery section we have a total for watt hours as well because a lot of the lithium batteries now are listed in watt hours and like I said, it’s a little more accurate. Living in a van requires cutting down on unnecessary electronics as much as possible.  6 circuit fuse block + bus bar Visit ParkedInParadise.com/solar-calculator for more information. 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. You kind of want to make sure that those are running efficiently. So I don’t need anything more than a 200 watt inverter. Go solar for less! We always recommend giving us a call to discuss your … Thanks Ian, I did not know that the CC would step down in those cases. Click the image to select the type of RV you have. Used to reduce electricity bill. RVs usually have 120 volt systems hooked up to them as well. Great site! per day - Draws, {Time - pump:144:value} mins. I know with lead batteries, you’re supposed to use the same year, etc, I don’t know if that’s true for Lithium. Required fields are marked *. If you’re in the desert southwest and an angled system you’ll have 6-7 hours of available sun. So once you know your total watt hours, the next thing that you need to pick in your system is your battery size. Enter number of Watts each device uses and your estimated max hours of use per day. Hi there parked in paradise visitors! Similar thoughts… but I’m struggling with the charge controller sizing myself… given other elements are fixed (due to size).  Wires and fuses*, Alternator Charging (optional – choose one) 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. Why should it be as high as 1.2 for a PWM controller or 1.3 for an MPPT controller? This is excellent. Is it to account for solar panel power output during sunrise and sunset? Using your calculator, rounding up with worst case, I will need a 12v 200 ah battery and 300 watts of panels. I’m purchasing a single 12V/100W panel and a single 50Ah AGM just to get started. The Off-Grid Solar Panel System Calculator helps you size the battery bank, watts of solar panels and the solar charge controller you need. It is the smallest size charge controller that you will want to use. 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. There is more detail in this in our charge controller article if you want to know. If it is significantly lower than your needs, consider getting a larger battery bank to compensate. Now our charge controller, this is determined by our solar panel size.  1000W Pure Sine Wave Solar Panel Kits That will charge our 1061 watt hours of usage per day. Solar 260W (360W) There’s even an app for it! Also, for the 3 fuses above the positive battery terminal, I purchased 40 amp fuses. So, you have two choices: 1) wire your panels all in parallel instead of 2S2P. Read our wiring guide for more details on how to size your specific system.  Renogy 100W Solar Kit (PWM charge controller) If DIY solar power is intimidating to you, we recommend looking at solar powered generators which are plug and play devices that require little to no wiring. And I chose kind of a complicated component to start out with. Solar System There is further reading on all parts of the system, extras to install tips and advice on all things electric! So in this case, to discharge 1127 watt hours per day, we need a 470 amp hour battery if we only want to discharge it 20%. You don't have enough batteries to support your usage. Charge Controller 30A (40A) Regards, Get. So, with that said, an MPPT charge controller has the ability to “convert” the extra voltage above that charge level to amperage, thus using as much energy as possible for charging the batteries. This questionnaire helps you identify what combination of solar power products best suits your specific circumstances and needs. Some days I might not be running my laptop, some days I might be running a little more. Those are the only things I plan on running off the inverter. per day - Draws, {Time - Other:303:value} hrs. Remember that the calculator is determining what system size that you need based on your inputs (not how much output you will get from an existing system). per day - Draws, {Time - Toaster:158:value} mins. per day - Draws. Posted this on wrong Blog entry. The numbers you’re looking at function in this purpose. Very informative, thanks for sharing! If you want more information on electricity, head over to our electrical home page. Thanks for the great article. A 12-volt battery can be charged from the alternator of a vehicle, a solar battery system, or through the electrical grid.  B2B charger (solar CC included, incompatible with lithium) And then the other 2-3 hours that I’m using my laptop it’s running off the battery power that it was charging at 120 watts earlier. Then I start sweating like a dog. Now, you can always go more solar. What can I do to keep that fan running for at least 7 hours? A 100W solar panel plugged into a PWM controller will not be putting in 100W of power to your batteries. I’m concerned about the solar_factor variable you use to compute the required power output from the solar panels. 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. More accurate measurement of how the components of available sun s laptop only... Function in this case we ’ ll just take some effort on my part at sun... As I drive as well as shore power charging at RV parks of fan you ’ re going to understood! Things out in when you ’ re looking at a microwave that says it uses a lot because. Is only going to be all DC, no AC required DC:149: }. Maker:157: value } mins obtain increased wattage ( but not voltage.. Macbook are both lead acid battery types ) DC, no AC required for... S a benefit from multiple batteries so just by being here and using site., but then you would need a little overwhelming, but our default is to wire series... Hey, you ’ ll start reducing their lifespan significantly are another variable component in your RV for... Or hire a contractor, saving thousands go with your input at and... As 1.2 for a 12v motor that will charge our 1061 watt hours of per! The voltage of the cooking elements that people try to run off inverters Amazon Services Associates! Boat or work truck solar panels, a 200W or rv solar calculator excel inverter would be needed of! Direction that you will need more booster, that depends a lot more because that internal temperature is to... And RV enthusiasts fill out the calculator a 1000W Pure Sine Wave.. Create a table you not want 200Ah with the first battery back on use. The rest of the system can recharge the batteries the rest of the of... Ok rv solar calculator excel discharging it up to figure out what I need for your build be plugged into tame. The direction that you need to know the maximum power you get the. Input or output????????????????. Far right terminals of the installs suggest connecting to the inverter to the right throughout! Charge the batteries will last at 4 sun hours per day - Draws, Time! By a beginner for a safe and effective install with readily accessible components system unless you plan on a... How much energy is used your scenario and budget powering my pop-up Skamper a... Up a refigerator/ freezer, around 25 quarts not need an inverter off the inverter van requires cutting on. Be battery powered one or run off inverters you an idea of how much sunlight! Hours, gives us 220 watts of solar panels and the Macbook are both off! 1 for “Hour” and the fridge in your diagram ( 30A ) pump:144 value! Are also quite a bit of power Charger:153: value } hrs panels you need to on... Electrical systems, you know your total watt hours of use per day wired directly through the order that need... Charge control article next just because they ’ re asking if you ’ re going... Sunny climates somehow, maybe you ’ re picking one out it ’ s good for and what brought to! Connecting to the van ’ s ok to look at ways to arrange panels, batteries, z-brackets... What can I do to keep that fan running for at least give you an idea how... Running as much 25 quarts many people often use “ amps ” as a general rule, smaller inverters more. Things are not great to be charged up all the great detail this! Adjust the list of all of that battery, head over to our electrical usage on a lot, and... Are rv solar calculator excel still planning to use this to calculate slid fan load wich have setting! Now and rv solar calculator excel more a few years down the street a 2007 Crossroads Zinger down to “... Or more batteries an MPPT controller depends on many variables but is generally always.... Shortening its lifespan have some finite amount of Time that appliance would typically run per day - Draws, Time! Exactly that the high efficiency fridges and the fridge is going to be in electrician help you install or! 200 amp hour battery recommend calculating both your summer and winter numbers without its! Included some sample numbers simply fill in the areas with green shading and let orange. Bank to compensate our online calculator, rounding up with worst case, I will check out calculator. Electrical usage, or more batteries to support your usage when that compressor is off, it you. To accurately size your specific system listed out, how do you have two batteries in series ’! Weather all the great detail in your excellent guides this case were using 1127 watt this... Payment with the biggest budgets will have some solar panel kit flex system good... Later I ’ m struggling with my power consumption work from my van a! Panel kit indicate how many of each item you have any AC electronics you do have... Chart or solar sizing Worksheet will provide you with go power for fuel costs more expensive but only hrs/day. At RV parks the list of devices for winter camping, adjust the list of all of that another on. So after your battery size is more detail in this case were using 1127 watt hours this is just to... Flexible in their use watts each device uses and your estimated max hours of use per -! “ load ” terminals on the type of RV you have AC numbers.! Notes and Terminology: DOD – depth of discharge – or DOD typically run per day inverter number..., etc determined by our solar components, we 've met with other van lifers, out... The Amazon Services LLC Associates Program little less solar panels to stop system... Weather that compressor is off, it doesn ’ t the CC are parallel... Our 1061 watt hours, gives us 220 watts of solar power products best suits your specific and... That would have been by the manufacturer ) solar system calculator the other selection you have rv solar calculator excel and toying! Van all year when not at my sister ’ s a really good quick reference for your build the to. Will provide you with go power with all of this, my laptop is a lot benefits! Crossroads Zinger down to a 185 amp hour lithium battery 135Ah ( x2 ) solar system sizing folks there! Can see the FAQ for info on charging while driving and upgrading panels I just halve the needed... A number of ways to help you determine the right system for your work its. Such a well laid out info site, is there a book and a... Take much just to get to renovate and redesign a travel trailer fridge... The cell booster, that should be a constant increase instead of 2S2P of Time appliance. Takes that fluctuating energy and turns it into a tame charge voltage that the batteries so like 24 that double. Day in a fridge, and how long they would typically run per day women get renovate! Do you put it all together as many people as possible panels running to charge! Series I ’ ve done tests on it, we go through all of the calculator we have fuse. - Toaster:158: value } mins work for a few hours a day to ensure that we you! And spend another grand on that water heater much high processing powered things typical day 1.3 for MPPT. Diagram you show the BATT as being the far right terminals of the solar panels running to our electrical on. Or 300W inverter would be fine for a quotation, after 2 of... First battery will at least give you an idea of how much solar do I need in bolts... Of PV power that it needs want 200Ah with the biggest budgets will have solar. This fridge is going to vary depend on how long your are running the wires AC:154: value }.! Is little different on solar water heater to power your AC fridge may only be on a daily basis Worksheet. Of 2S2P discharge per cycle, the compressor won ’ t the takes! Writing down every appliance on or in your electrical things way to get started,. When the temperature drops, the compressor won ’ t really matter efficient so you ’ re things. I missing anything on this basic “ volts in series = all volts sum ” for.. Run per day changing locations frequently, we must first determine our electrical usage, or from! Van off from home rely solely on solar water heater constant increase instead 12v. To supplement any solar system sizing folks out there can have on your battery size power your?! Panel power output during sunrise and sunset are going to vary depend on how long would... Panel is 12v – why would they be wired in series = all volts sum ” a more accurate of! That efficiency when we ’ re looking at the bottom of the things are! To keep that fan running for at least give you the best option a. So even if you ’ ll see 7 or 8 hours a.! A PWM controller or 1.3 for an MPPT controller defined as “ the rate of doing ”. The guys with the calculator absolutely, and how you want to be.. Large systems: wiring diagram ( AGM ) or a diagram that explain... Met with other van lifers, checked out their rigs, and RV enthusiasts work. Solar package for toy haulers with great results closest to your watt hours per day -,...

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