How Much Solar Power Do I Need? How to Calculate Your Needs
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In this video, I will cover how to size your solar panels, battery bank, and charge controller so you can build a DIY solar power system that is perfect for you!
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When asking yourself “How much solar power do I need?,” you first need to know how much power you need to run the appliances that you want.
Online Solar Calculator → www.altestore.com/store/calcu...
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ABOUT DUET JUSTUS
Hi! We are Michael + Jenny Justus. We post videos on our life of alternative + sustainable + healthy living. Our desire to live a more meaningful life led us to concoct a crazy plan: Downsize our belongings, ditch the "9-5," and move full-time into a solar-powered, self-sustainable tiny home on wheels with our two dogs, Chase + Roni. Taking this leap into the unknown has completely transformed our future, so be sure to hit that SUBSCRIBE button, join the Justus League, and follow along to see where the journey take us!
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Пікірлер: 298
Hey guys. Hope you enjoyed the video. If you know anyone who is interested in DIY Solar Power, it would really help us out if you shared this video and spread the word on what we're doing. Thanks a bunch and we'll see you on the next one! 😎
@dragonfly1414
6 жыл бұрын
All I know is winter I used 6.78 kilowatts and summer 7.5 kilowatts, please tell what I need for my inverter and batteries bank, thanks
@mwemu
5 жыл бұрын
On the online calculator you used, there was this part '3 String Configuration' in battery connection. What does it mean?
@amaodemmy
5 жыл бұрын
hi, I'm interested in DIY SOLAR POWER asap. Thanks for the previous uploaded videos.
@amaodemmy
5 жыл бұрын
How can I get your contact information?
@kevinnguyen8612
5 жыл бұрын
Wouldn't it be easier to call the electric company to get the monthly usage over 1-2 years and average it out?
I knew next to nothing about electricity and solar power when I found your videos. I had just researched enough to know what watts, volts and amps stood for! That and the basic components of an RV solar system, panels, controller, battery and wires. Your video explanations are so clear that I learned what I needed to know to make a wise purchase when I am ready to do this. I know that I will not install it myself, but I wont be in the dark as a consumer. You are a born teacher! Thanks so much for taking the time to share what you learned from your research and experience in installing your system.
At last! Someone did a video that explains things in the absolute simplest and DETAILED terms. Thank you!
I am currently trying to determine if I can do this myself and your videos are immensely helpful! Mucho thanks!!
I highly appreciate your comprehensive explanation! It is very smooth. You are a very good Teacher
Seriously, the best videos by far. Biggest thank you.
Dude, best video ever for newbies (Like me and my dog-Rascal B. Ornery) understanding this!!!! You Rocked this one! yes, you did do it Justus!
I'm working on installing solar on my RV I just bought and your videos are such a big help. Thank you so much your videos are helping tons 😊
This is what exactly I was searching brother.. Thank you so much
Very helpful. Prior to this I thought that one would just have to guess what to use if you were not a solar installer. Thanks for the video.
@DuetJustusFam
6 жыл бұрын
Awesome! Glad it helped 😊
Thanks for all your solar videos that has been very helpful.
I don't need any of the information in this video but have to say you did a great job putting the video together. Looks like the work of a professional. Well done.
This video is the best info I’ve found. Looking to solar power a tiny home. I’ll be using this!! Thank you!!
just wanted to do a shout out on how good your videos have improved, you can tell the last three years have weathered your confidence levels well, your instructions are really informative and i think realistic and not contrived like a bad reality tv show series. I look forward to your January start and the places you two end up going too. I predict that you two will hit 100k subscribers by this time next year if you keep up the good quality video that we've been accustomed to watch. Have a great Christmas with your family and happy trails next year....
WOW! This video was very useful! THANK YOU!
Very helpful!!! I actually understand this stuff within a day by watching this video
I really like your videos as you make it easy to understand. Thank you
Thanks heaps mate!!! This would have to be the best explanation on solar set ups and needs on the net. You have a sub right here :)
The best way to get the KW reading is to read your house electrical meter, it will show you the amount of energy used. In summer it will show for a household 1KW and in winter it may show 2 or 3 KW as per your heating of the house.
Very thorough instructional video. Nice.
ahhhh the Metric System, simple precise and beautiful!
Thanks duet justus for teaching us how to compute.
The second of your solar videos I've watched and just want to say you're the best! You make everything so clear I don't feel overwhelmed anymore. Thank you and keep those videos coming!
Very thorough/interesting - I think I could DIM! Thank y'all and God bless!
@DuetJustusFam
6 жыл бұрын
You absolutely can. I believe in you 🌞
Awesome video. Thank you for your help in understanding what I need to do prior to buying solar
Thank you for this video. I understood everything you covered ( which is a first). Now I feel like there is hope for me yet.
Wow that really helped me understand how to figure my solar needs. Thank you. I'm really looking at flexible solar panels because they weigh so much less but I understand that they are not as, should I say, reliable as the rigid panels. Hopefully that will improve.
That was a wonderfully informative presentation! I had already began my list and this video gave me some good ideas to simplify it! Great website also! I love how simple you made it....ANYBODY should be able to figure out their needs! I have a Toy Hauler, so a generator certainly is an option, HOWEVER there are too many times (& places) that I don’t want a noisy generator interrupting my peace. You did a great job putting this all together! I look forward to the upcoming videos!!! Thanks bunches Michael (and Jenny for “taking one for the team”!) Lauri
@DuetJustusFam
6 жыл бұрын
🌞🌞🌞
Thank you. Very easy to follow. Appreciate it very much.
thanks a lot for your comprehensive explanation.
Wow! That’s great advice for how to think about what size of system you need. Thanks!
This information is so valuable to newbies like me. Thanks so much for the great video.
Fantastic, so well explained. Thank you so very much.
Good, Duet! I need to do it.
I ended up with 400W or solar and 430 AH of battery and only ended up starting the generator once over 3 months. And that was to run the A/C. The cost for solar is modest though if your rig already has a generator that runs off of the vehicle tank, then the convenience of solar may not be there. Even though we ran a lot of stuff off of the battery including electric appliances and an induction burner, it was rare for the batteries not to be fully charged by mid afternoon. Of course, this was during the summer. I'll be interested to see what you chose for components. Good job on the video.
Interesting information and very instructive.
Very informative need to watch more.
Fantastic video and information. Thanks :)
wow great video,thanks for the easy step breakdown. i'm new to this so this was a great introduction.
This is very helpful....thank you so much.....
Fabulous i love it. I have subscribed to your channel after watching few videos of yours.
This is great! Liked and subscribed
Thanks mate. Great vid.
I love your video explaining solar sizing and set up. I took so many notes. I'm in the design stage of a bus conversion and a concept I've come up with is a tilting mechanism for our many roof solar panels while we are boondocking. My question is whether, in your opinion or any research you have done or come across, of the added benefit of tilting 8 to 10 panels to more directly face the sun vs. a flat fixed location on the vehicle roof? Thanks for your time and again, your videos are very informative!
Its good and thanks for helping out.
Great information. Thank you.
Awesome video, great information
Very informative. I have been wondering how RVers know what they needed in solar panels, batteries, inverters, etc. You have made it quite simple in this video. Thank you!
Great teacher
Very very useful!!!
Very nice and need every information
Excellent source of information
@DuetJustusFam
2 жыл бұрын
Thanks for watching!
Great video Michael! That sizing chart will help for sure. Still deciding between another 5k gen for the fiver and a full set of solar. Decisions, decisions!
@DuetJustusFam
6 жыл бұрын
Decisions, decisions indeed! If it helps, we absolutely LOVE the freedom of solar. Good luck.
Very good info. When I started learning solar I kept combing back to one issue. Battery weighs approx 75lbs times four. And you can only drain it to 50% so I’m carrying around half a battery I can’t use.. so search was on for life of battery and excess weight that’s useless cost compared for that and extra fuel used. In 15 year period about 5 grand so after meeting a solar expert we talked about one batter and 48 volt system with charge controller etc 12k and 25 year battery life I can drain to literally 0 and can run the a/c 4 hours a day on solar or not run it and can last four days with not needing to charge that one battery. Yea a ton more $$ up front but long term much cheaper
This tutorial was very realistic for me I can clearly understand that I am throwing money and energy away in my home. Using an off grid solution is exactly like planning for a life at sea where there can be no room for excessive consumption.
Very informative
Thank you this is a great video and very helpfull
Thank you EXCELLENT, just found you!!!!
Your the best. Thank you much
Thanks super helpful subbed since you're from mo too 🤘
Hi Guys, Very interesting thank you for making the great videos 👍
Thanks Great Video!
Very useful and clear. Thanks. Greetings from Saudi 🌹
Thank you
Awesome videos! Very helpful as we put ours together! :)
Bravo! Thanks .
Just found your channel AWESOME!!! We are newbies to the solar world but want to go totally off grid. We do not use any 220 lines in our house no TV,cable ect. Getting a sundanzer freezer. So basically lights and kitchen appliances will need power. We use wood yo heat. Trying to figure out what we will need. Of course the solar company in our area is pushing the biggest most expensive system.... what do you think ? We are in the south western county of NC in the mountains. Our house faces south on one end. Panels will work on the roof...... thank in advance
good day this video is very helpful to me. to learn what system i will be needing for off-grid system. the next step is cost and budgeting
Hi love your videos easy to follow, Can you use different size solar panels to make up your wattage
thank you for your lecture and how i can find that above software that you solve the example
Very good video
Thanks brother
Thank you! At least I have now idea.
Best, i just subscribed.
I realize this video is 2 years old, so don't know if it's getting much attention. I wanted to share what I did. I came at the sizing approach from a different direction. I have 5kW generator that will run all loads I have except HVAC, Water Heater, Range. Etc, Basically the only 240 V I want to be able to power is the well. I could run everything including the well with the 5kW generator. This gives me an idea how big the inverter needs to be. By turning off the big loads and taking electric meter readings I could come up with an actual daily use without looking at every little load. I ran between 4 and 5kWh day.
VERY NICE VIDEO
My current Excel Energy utility bill shows my daily and monthly kwh data so I presume going through the spreadsheet exercise is not necessary, but very interesting to see how to calculate. Thanks.
Hello. great video. I have three s/panels 180w combined - a 2000w inverter and 5 batteries 410ah. I power a tv. DVD and l.e.d lighting... Q. am I over doing it a little? I live full time in a converted long wheel base van all yr round in the UK.
Thank you for this video but I realise everything everything u running are DC what size inverter will I need for this will it be the same amount of total wattage per day used?
Its very useful
Yo the best boss thanks much
thank you
Hello. I love this video. It really great.. Buy I have a i question.. The calculation above. Please how many batteries do you derive to? In rate of 12v/200ah..
thank you very much for sharing the ideas. but i cant get the solar calculator.please help me how to size the components manualy?
Being new to RVing and diving into it by building my own van conversion I literally have know way of knowing how much power I'll use per day. My biggest power draw most likely will be my cooler/fridge, computer and TV all of which I hope to run on 12DC. My plan is to live full time and I will be solo but since my activities include various mountaineering activities year around as well as self contained bicycle touring i'll also be traveling/staying in all weather/temperature conditions. So since living in an RV is not the same as unlimited power usage in a house I'm lost right off the bat. My best guesstimate based off watching KZread videos would be around 400W panels but I'm not sure if I'll have the room on my Transit van, any suggestions?
I like your eplaination... think it will help me later.
Hi! You are the dude, i want to ask.. I'm going to buy fev 285w PERC- panels, they told me, Perc-panel is the best. Is that so..? I'm beginner, but very exited to learn more about solar power! Could you help me..?
Hi do you have any information about sizing pv system based on intelligent techniques used to labview
I am just getting into the solar panels which I have four panels 25 watts each Hundref Watts total wired in series I believe each panel has it's own wires which plug into a 4 way that plugs into my controller. When i install my four 6 volt batteries in series and parallel then connect my modified inverter to plug in my 30 amp RV will I do any damage to the inverter in the RV? My inverter is a 1000 watt. Right now before I got solar I just hooked up my 1000 watt modified inverter and plug my RV into it and leave my truck running to run coffee pot and tv in mornings
Hello im your new subscriber. I have question.what is the best connections for 5k t 100 kw design? Is it series all over or parallel or series parallel. Thanks
For home use, looking at the electricity usage on my bill would give me the total per day.
Good afternoon Can you please advice me on what will be required to install a 150kwp, 50kwp and a 3kwp each solar power ? How many inverters, solar panels, batteries charge controllers and other requirements? Counting on your advice and quick response Thank you.
Hi ok I need to make a appointment for 3yr from now on the solar
I am trying to work out my solar needs for a camper conversion. In the spreadsheet should I be finding the Watts for the chargers or the devices themselves? They have different values. Help!
@ineelengmotlalekgosi5264
3 жыл бұрын
Fiona Wright chargers, unless devices are plugged directly without chargers, eg 12v bulbs
Hi, Awesome series that you have here, so thanks for your efforts really well done. I do have a question or 2 if possible, hope u can help. If i wanted to run a Computer system for 24 hours a day, my computer system has a 1000W power supply. The thing is i have a 1000W power supply but i am not maxing out the Power of that supply, My power meter is only reading under 450w. SO my question is, Should i still calculate of the MAX potential Watts of my PSU or what my computer is actually using. This is the same for the battery bank? My other question is, If i want the Bank to power my PC through out the night and recharge throughout the day, do the panels need to produce double the watts needed during the day so it does the recharge? For example uses 400w meaning panels need to produce 800w during the day to power PC and charge batteries for nights usage. I hope this makes sense, Thanks again
@DuetJustusFam
6 жыл бұрын
Hey 👋🏼 send me an email (duetjustus@gmail.com)... this numbers sound astronomical for a computer. Make sure you are looking at the output wattage on your power supply. An iMac is 217W max and our MacBooks are 85W
@rey_nemaattori
4 жыл бұрын
@@DuetJustusFam Depends on your machine. I used to own a 2 cpu / 12 core gaming rig with two MSI R7970 graphics cards which, if ran at full power, easily pulled 800+ watts. The PSU was rated for 1200Watts, as the motherboard actually had room for 2 more gfx cards, never got to install them though. It actually heated the room it was in to unbearable levels during summer... But it's very unlikely you would run that 24/7 in an off-grid setup / camper van anyways.
Good Morning. I’m going to install 2 new 200W solar panels. The question is Parallel or Series. I have heard the Series is not as good because of shading you lose some of your power. Yes the Amps are around 10Amps with 40 Volts and Parallel the Amps are higher at about 20A and the Volts are lower at 20V . All so I read some ware the solar panels need to have a voltage around 20 to 30 volts above the battery voltage Do you have any thoughts on this. Thank you Jack
thanks for your help i really enjoyed and waitin your nex vedeo if Allah says
Hi.. I need help please. I'm a tinyhouse person, I didn't build it. It's grid tie exception is toilet. I'm planning on getting 5 x 480w panels, I have an eccoflow delta 1300 to power the house (fan, fridge, occasional lights) how can I put the panels up and wire it to my house w/o pulling out the current setup? Also I'm thinking of doing 48v sys
Hello I want to install my solar 12v 50watts to my battery but I don’t know how many Ah of battery 12v I should use . Can u tell me it the best one ? How many ah that 50watts can charge in a whole day ?
Hey am I missing something here, On the load charts presented in the output wattage column, it's like he has been presented with the correct wattage first and worked backwards on the P=VI formula with all different voltages except the voltage will be fixed at what ever voltage the system is -240v/110v/24v/12v