How To Use Solar Panels Directly Without Battery - Off-Grid
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- čas přidán 3. 07. 2024
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In this video, I talk about different ways to use solar panels directly without a battery. Whether you're curious about running an inverter without batteries, leveraging solar panels for direct use, or exploring options like AC on solar panel without battery, this guide is your go-to resource.
I cover various methods, including direct solar panel usage, buck and PWM converters, larger pump controllers, and off-grid inverters, shedding light on efficiently converting solar DC to AC without the traditional battery setup.
I start with a simple explanation of powering 12V loads directly from an 18V solar panel for applications where operating without peak efficiency or potential risks to device longevity is acceptable.
Next, we use the buck converter for stepping down voltage, perfectly suited for powering USB devices or 12V DC loads, and even connecting to an inverter for AC loads. A real-world example is presented, detailing the setup for a 50W pump powered by solar panels through a buck converter and an inverter, emphasizing the practical aspects and calculations involved in such setups.
The video explores the use of PWM speed controllers to control the speed of DC motors, offering a hands-on approach to adjusting motor speed with precision. Additionally, for larger applications, the pump controller segment provides insights into managing substantial pumps with solar power, highlighting efficiency and the potential for integrating float switches for automated control based on water levels.
Video about running pump controllers: • Solar pool pump instal...
For high-power applications, I introduce the concept of running an inverter without a battery with the Growatt SPF 3000TL LVM-ES off-grid hybrid inverter as a viable solution for substantial solar setups without batteries.
This guide is not just about running AC on solar panels without a battery or using a solar DC to AC converter without a battery; it's a comprehensive look at alternative energy solutions tailored for those ready to embrace solar power in unique and efficient ways.
Your feedback and experiences are invaluable-share your thoughts in the comments, and let's learn from each other. - Jak na to + styl
🎁 Free Diagrams: cleversolarpower.com/free-diagrams/
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Nick is an excellent resource. I paid him for a diagram to connect several components. He went above and beyond 10x back and forth not only to help me understand, but to ensure I had the correct components, type and quality so my system would not only work but be secure/safe. Thanks Nick.
Thanks rick!
Some good ideas, thanks !!!
My solar panels 445W x10 average 70% efficiency when pulling power on a Sunny day.
Thanks friend, excellent content!
Good Morning ! THANK YOU. TAKE CARE..
Excellent, thanks for sharing. Cheers.
I now use 36v panels to charge 24v battery banks and 24v to 110v pure sine inverters to run 4 110v 9500gph waterfall pumps. But induction motors require 4x or greater wattage inverters or the inverter burns up. I made the mistake of putting 4 600 watt pumps on one 4000 watt inverter. It didn't last 1 day. I now have 6 240 watt panels to 2 100ah 12v in series for 24v to 1 4000 watt pure sine wave inverter to 1 9500 gph 600 watt waterfall pump made to run 24/7. I have 4 sets of that setup. The inverters don't even get warm. I got the panels from SanTan Solar for $50 each. 24 panels. Inverters were $300 each. Batteries are now $200 each. Charge controllers were about $60 each. I find 24v systems work more efficiently and have more power than 12v systems. Also, I use digital programmable relays to shut off 110v relays to turn off the loads when battery voltage reaches 24v and set to turn back on when voltage reaches 26v otherwise the LiFePO4 batteries discharge too low for the charge controller to recognize them as 24v and the inverters go into fault mode. Adding the relays stops the batteries from discharging too low and the pumps resume the next morning when the sun comes up. It takes a few days of monitoring to get the settings just right, especially on cloudy days when the relays turn on and off, I had to set a large enough delay and cut on voltage difference.
Yes, the losses are negligible.
You also loose efficiency from Sun
heat warming the panels, and loose efficiency by voltage conversion from dc to ac.
My “rule of thumb”, is, I don’t increase voltage to 120/240v unless I’m going to sell it to someone. I live off-grid.
I pay $0.25 cents per watt on my panels, so I add one more panel to make up the losses.
In my example, the motor is a well pump.
No inverter, or battery necessary. It runs in day light, fill the holding tank until the next Sun.
A battery is a buffer. A tank is a buffer. Ph + Poh is also a buffer. Buffers come in many flavors!
Like I said, lower the panel volts from 18v to 15v by using diodes(no inverter faults), and it bloody works!
When the inverter get's hot, it should shut down itself in order to 'save itself' from overheating. Santansolar is great for panels. Thanks for sharing your setup.
hi, Do you mind sharing a little more about your setup? I am planning on running a pump without battery just like you have.@@offgrid-goo-roo
@@EspitiaRiman Hello.
Please tell me about the application:
GPM Flow needed?
HP?
Have you selected a pump?
Bravo.....and capastor .....bottles in 5 gallon bucket .....8ohm....cheers
Thank so much
Great work. Why don't you give these proposals to companies so that it makes it useful for us. (means customers). All the blessings go to you
2 mins in and i love this guy!
Love you too!
Very informational …i never knew about a buck converter.
Bravo, this is great. Try to build some for us to buy.
Very good
I have used 12v panels to power 12v bilge pumps to aerate a pond and it worked great. My bilge pump looked exactly like yours.
my problem is, when it gets dark or in the evening..
Thanks for sharing!
Then it turns off...
New subscriber always watching your videos very interesting❤❤❤
I want to understand this so badly, but I just can't seem to, Like I'm watching these videos waiting for something to Click in my head but it's just not happening , I do love how you layed out the video very simple visual, I will continue to watch it and hopefully a hope that something clicks, i'm so jealous of all of you that can understand this....🤔😕 Guess I will just cook up some thai peanut sauce and make my thai style char-broiled chicken burritos 😋cause cooking is what I can understand 😂😂 .
Chicken satays with peanut sauce! I'm jealous. I recommend watching some of my videos; they will make more sense as a whole.
If you have battery, pass the output of the solar panel through voltage controller. Connect the battery and inverter to it. The voltage controller ensures that the battery is not over charged. From the inverter, connect your load.
If you don't have battery, pass the output of the solar panel to a bulk converter (DC to DC converter). Connect the output of the bulk converter to an inverter. The bulk converter ensures that stable voltage is fed to the inverter. Connect your load to the inverter.
Follow the calculations.
Thank you mike Scotland
Great content. I have a request if you're open to it. I've been thinking about the shunt monitors since that other video. Would you be willing to produce a comparison video between hall effect sensors and shunt sensors? I use the hall sensor. However, I am curious to see if shunts are more accurate. Thank you either way brother. Love the channel. Stay blessed
liked and subscribed. thank you. useful principal.
Thanks for the like and the sub!
Amazing video! I am trying to make a simple solar heating system for my spa (just 700litres) with a 12v 18w pump powered by a 25w solar panel. When i connect the panel directly to the pump it works great when the sun is shinging but when it isnt it just makes a whining noise. Which i guess might damage the motor. Do you have any advice? Do you think a buck co verter would solve this problem? I would really really appreciate some help!
The 5 volt dc to dc buck converter will be very useful for charging of mobile phone
EG4 has a video demonstrating their 3000EHV-48 inverter running from just solar and no battery.
Not sure how automatic the recovery from a temporary loss of sun is but it does work.
It's a little more $ but the mppt can handle 450 volts input and 5000 watts.
Thanks for adding to the conversation!
Hi just found your channel while trying to learn solar power setup. I would like to ask if it is better to use 500 watts x 2 solar panel with around 500-800 watts of load for 12vdc pumps x3 all at around around 150 watts and growlight (220vac) at around 500 watts using inverter. Or watt do you suggest?
We use a battery bank and a super capacitor bank. The super capacitor bank acts like a soft start. The super capacitor bank cycles so the batteries don't and batteries don't have hard cycles. Making batteries last longer. And the super capacitors handle the surge like from circular saw.
very nice. could you do something similar for wind power where the input is variable AC?
I don't have experience with wind power generation. I feel the residential units are not worth it. But that's my opinion.
Thanks for the info.
Being a high frequency inverter, is the hybrid (off-grid) inverter you mentioned suitable for pumps and air-conditioners? Assuming the KVA is sufficient.
Do I need to worry about using it for those two use cases? High frequency vs low frequency has always been a concern for me due to my need for pump and air-conditioner. How much of a factor is it?
If you start pumps, then I would recommend low frequency. They also last longer. High frequency inverters can power a load X2 their rating for a surge. This should be mentioned in the data sheet of the inverter. I recommend using a surge clamp Amp meter and measure the surge on your pump. If it falls under the max surge capability of the inverter it's ok. However, if you don't have a battery, it's not going to work. The surge power has to come from somewhere. So you will have to install batteries as well.
Perhaps an idea for a next video: hybrid inverters typically produce 220V/20-25A AC power..... how to achieve higher amperages?
You can put more inverters in parallel if they are compatible with multiple parallel units.
can I use boost converter to charge 24v battery with 12v solar panel( open circuit voltage 24.50v)? Is it will be efficient or use a buck converter to charge a 12v battery?
No, you need a charge controller the charge a battery.
I bought a 100 watt solar panel and a small 500watt inverter to power a fan in my detached garage. Do I need a simple buck converter between the panel and inverter? Can a 5 amp buck converter handle the inverter draw?
Check the power rating of the fan. I would size it to twice the size.
How to save electori power ?
would you show me the connect to Panel and Fuse and light for the home Detail Thanks! and How many spart pare.?
I have made a video about that. Search: 'cleversolarpower fuses size'
Can any one please help me I cannot finger out if what I have planned will work.
I have a 5kwh off grid inverter Growatt 500es, the reason I picked this model it no batteries are required and any power my solar will not supply it will be toped up from the grid.
I want to put the 5-6 panels on my garage roof facing south south west with a 30° tilt.
And 5-6 panels 90° against my west west south wall.
The inverter specs are as follows
5Kwh inverter
450v PV input max
22a PV input max
Where I live on an island in the UK it is almost impossible to get low ah panels 10 or bellow, but very easy to get high Watt panels like 550w+
Unfortunately they are all around 48.72v VOC x 14a STC.
I want to connect them in parallel in pairs of 5-6. In my head this should work as I should never hit the 22a current but I’m just not sure.
Can an expert please explain why this would and wouldn’t work.
Edit
My South facing flat roof is 3m x8m this will only fit 7 450-550w panels on it max laying down and 6 with a 30 degree angle.
my west facing wall will only 7 of the same panels flat against it.
The panels I'm looking at are bellow as there are easy to get in my area atm.
www.cityplumbing.co.uk/p/longi-solar-hi-mo-x6-535wp-black-frame-pv-module-lr5-66hth-535m/p/104460
Thanks
Great video !I have a question : Can I run a 48 V dc pool pump with 1200 Watts of PV and using a Victron MPPT- 100V/20 amp, 48 Volt controller and. An EG4 51.2 V 100 Ah/5120 Wh battery? I would appreciate your thoughts.
I believe it will be possible. It will also depend on the current of the pump. Maybe a buck converter that converts the 56V battery to 48V will be necessary.
PC Power supplies(PSU) can work with series Solar panels if the Rectifier Diodes are removed and bridged over.
You need about 150-170 volts DC(from the panels) so that the PSU can work with the selector at 120V setting.
PSU's output most of the power on their 12V Rail.
VOLTAGE ABOVE 100 VOLTS DC IS DEADLY!! BE CAREFUL!!!!
That's interesting, do you have any video or diagram demonstrating that.
@@OlusolaAkanni The rectifier diodes are usually combined in a four- legged component called full bridge rectifier
There are two contacts for AC input and two for + and -
You can directly solder wires to + and -
But you can also remove the component and bridge over one~ to + and the other~to -
It should still run with the rectifier installed. even less than 100vdc is dangerous
@@mickwolf1077 Yes, but there will be an unnecessary Voltage drop with the diodes and by removing them you can easily determine the polarity for your plug.
Working on this you have to be extra careful!!
Plug in the panels after you really completed everything!!!
Great illustration!
Kindly clarify me, sir.
If
Watt = Volt x amp.
For a Solar pv, does it mean
Pmax = Vmp x lmp ?
Because I have 190W with: lmp 10.11a & Vmp 18.8v.
Would I be correct if I say
Watt = Volt x Amp,
Pmax = Vmp x Imp, and my pv
190w = 18.8V x 10.11A ?
That is correct.
Hi, how to use 220VDC-240VDC direct from solar panel for an rezistiv tool. With consumption 230vac 1500w or 2000w. ?(for heating air or water)
Check the last method mentioned in the video.
Thank you for your video's. They are excellent.
I have 4×12 batteries in series charged by a 48v cc
But my inverter is only 12v, is it OK to run the inverter connecting to just one battery from the string?
No, you should not do this. You need a 48V inverter.
@cleversolarpower thank you for taking the time to reply. What is the adverse affect of doing this? Unequal charge?
How about efficiency of system if I directly use buck converter?
A buck converter is about 90% efficient. Same as an inverter. But an inverter also has idle power consumption. I recommend using a buck converter if you can.
INSTALLED 8 X 405 WATT SOLAR PANEL on my bungalow and charging my allpower battiers 2000 and 1600 via one 405 watt panel do you have any sugestions should I uses an inverter on my other seven have not connected them to anything as worried my be to powerful nearly 3.2kw if all eight used ? looking to do it off grid
Checkout my video 'complete off grid system'
@@cleversolarpower does not answer my question ?
Hi, I am really glad I found you on CZcams.
I am your new subscriber, Thank you for the information.
This is useful to me am very inspired
Thanks for the sub!
മിടുക്കൻ
Please how can I order the 650$ hybrid off grid inverter you mentioned above
It depends where you live. Some inverters are not available outside of the US. So I would check local solar power shops if you want to pay for expertise and warranty. or local webshops. Last on the list would be AliExpress or similar.
@@cleversolarpower yes I am ready to pay
If you don't want the expense of a lithium battery just us a lead acid battery as a buffer
You will still need a regulator to smooth out the voltage.
An inverter will switch off if the voltage get too low.
IMO, that's the cheapest practical way.
You may get away with using a old 12v car battery if it has some life left in it.
Nowadays, it might be cheaper to get a lithium battery, though. 12V 100Ah, is all you need for $260.
I have been doing that for 3 years now with large used truck battery that still holds a charge and it works well for me.
I have a 24v 12000w pure sine wave inverter with 1500 at peak power but still can't power my photocopy machine so also is the second inverter of 12v 3000w with the peak power of 1200 it is because of this problem of unable to power my photocopy machine that makes me buy the 24v 12000w but still can't power the photocopy machine please what can I do
I'm sure you meant a 1,200W inverter. Try plugging it into the grid and measuring the power consumption. Also, check the manual for the power consumption.
Need to learn and get better understanding, I want get of grid, and help with earth help
i'm curious about running a window a/c direct on solar and of course i don't know about the pump. the expensive stuff would not be worth it. the question is can you run a little window unit with a few hundred bucks worth of stuff. if it's thousands, nah. just buying the electricity is cheaper.
It'd take a lot of panels, there are some specific split systems that are designed to run off PV DC supply.
It will be a few thousand, so nah. What you can do is get a grid-tied solar system to offset the consumption of your AC. This would be the best solution for of-setting your consumption if you are grid tied.
I have a question, can I connect a 12v inverter to a 36v PV?
Solar -> MPPT charge controller -> Battery -> inverter. In this order.
@@cleversolarpower will it work without the charge controller?
The new EG4 inverters can also run without batteries
Indeed, some of them do. I figured this out later after making the video.
How does this work at night with no storage device?
It doesn't 😉
Good answer. You said without a batter, but you could also could have a night time setup. At night just have a power station just for lighting. 73@@cleversolarpower
Good day how can I get used solar panels shipped to me I buy used solar panels
If you are in the us, i recommend santansolar.
In #2, you are showing a 230 VAC motor, how can you provide 230 VAC using only a max potential of 96 volts DC?
Inverters can turn 12 volts DC into 120 or 240 volts AC.
It's probably a single phase motor not split phase.
Through the buck converter. Solar panel -> buck converter -> inverter. I just use this as an example. It's better to use a DC pump for efficiency.
Another way to utilize solar without a battery is using a mini-split heatpump with solar inputs. Free heat or air conditioning when the sun shines.
Easy solar air conditioner.
I forgot to add that one! Thanks for mentioning.
Can solar power be used to power a factory
Absolutely !
Yes, and the price will depend on the load. Question is that it will be cost-effective or not.
Thks;
Modifying broken UPS for long endurance BACKUP POWER! czcams.com/video/ehJmkIkIAFg/video.html
UPS BATTERY UPGRADE USING CAR BATTERIES czcams.com/video/K_S55zITqxI/video.html
How to convert a UPS into a Solar Generator czcams.com/video/2sd54ASzJqY/video.html
Aa/ greetings
Please detail 10KW, stand alone, battery powered Solar power system.
Load inc. Two ACs, refrigerator 130 w
3 fans, 10 LED lamps
Regards
I might do this in a future video. Thanks for the suggestion. With 10kW, do you mean solar panels or battery power?
Yet Another FREE diagram - potentially:
I use PV solar panels for heating water. In this case the water is the battery..
No converter - No charge controller - No inverter
Components in the system:
#) PV solar panels in series.
#) High Volt DC security switch.
#) Solid State DC-DC relay.
#) Hot water tank.
#) 220 Volt Electric Water Heater mounted in the Hot Water tank
#) Temperature sensor in the Hot Water tank and an Arduino connected to the Solid State relay. This simple control disconnects the heater element when the water is near boiling.
Optional:
#) Display connected to the Arduino - shows the water temperature.
### Do not forget the safty pressure valve in the water circuit. Otherwise You have made a BOMB 💣###
PV panels are in series
The voltage from the PV panels must NEVER exceed the nominal voltage of the heating element.
Can you post a diagram of this please?
@@squillo01 - The only thing I can use to make a diagram is paper and a pen.
Then I can take a picture of my drawing, but to where should I send it ? ?
It should not be so difficult to understand:
Components:
PV Solar panels in series (How many panels depends on the nominal voltage of the heating element)
I use an 220 Volt heating element.
My PV solar panels has Voc = 40.6 Volt and Vmp = 34.6 Volt
Six solar panels in series gives Total Vmp = 6 x 34.6 Volt = 207.6 Volt
207.6 Volt is slightly below the the nominal voltage of the heating element which is what we want. To avoid overload the voltage from the solar panels should never excede the nominal voltage of the heating element.
On the other side it should not be too low either because the energy deposited in the heating element is dependent on the voltage raised to the second power
( P = U * I = U * U / R )
To prevent the water in the tank from boiling, I use a Solid State Relay (controlled by a thermo sensor in the water tank).
Since the Solar Panels Open Circuit Voltage is 6 * 40.6 Volt = 243.6 Volt, which is higher than the maximum DC Voltage breaking capacity of the Solid State Relays, I use two Solid State Relays in series, each with a max braking capacity of 220 Volt DC - in that way I get a braking capacity of 2 * 220 Volt DC = 440 Volt DC.
### - OBS! Remember to mount a Heat Sink on each Solid State Relay - otherwise You have no Solid State Relays - ###
### - And remember the heat transfer paste between the Solid State Relay and the Heat Sink - ###
And finally, we must remember the high voltage DC safety switch and a fuse.
All components in a series connection
Why place a fuse in the circuit when there is no voltage source or energy source in the circuit that will be able to break the fuse. The only possible overload could arise from an external voltage source, for example a lightning strike.
What is important is to use such a large cable cross-section that the effect from the solar panels will not / never overload the cables.
If You still need a diagram, please send me your email address ;-)
Diagram:
|
[pv]
|
[pv]
|
[pv]
|
[pv]
|
[pv]
|
[pv]
|
|
[Sw] : high voltage DC safety switch
|
[fuse]
|
|
[Solid State Relay]|[HeatSink]
| > - - [Arduino] - - - connected to a thermo sensor in the water tank.
[Solid State Relay]|[HeatSink]
|
[R] : Resistor = the Heating Element in my water tank
|
Ohm's Law:
U = R * I
I = U / R
R = U / I
P = U * I or P = U * U / R or P = R * I * I
Ur diesel generater aint no when the fuel runs out.solar or wind is the way to g0
I understand enough about electrics to be dangerous, I just cannot get my head around this subject, just cannot understand the basics, end of.
I want to know how your going to have off grid electricity when at night or even cloudy days
You don't. That's why off-gridders use batteries.
If you go to bed when it gets dark, you’d hardly notice 😃 (great big smile right here)
i just pull the electrons from the atmosphere and it runs by 9.5kw jenny all day everyday for free lot easyier than solar garbage plus it dont work at night.
Right 😂
How it done? Kindly share the knowledge
In the good old days a very long wire, I believe..
But this fellow appears fanciful
im not born to line your pockets the knowledge is all out there was all made and designed in the 1800,s@@adesiyanishola4489
Too much equipment.
All you need is Diodes connected
in series.
Each diode gives you a voltage drop of
(0.46 volts)
You need to drop the Panel voltage from
18vdc to 15vdc. to activate the inverter.
Most 12vdc inverters(Samtec)*will reactivate at 15 volts dc.
For example, to activate a Samtec 120watt inverter, drop the PV volts from 18v-15vdc( 3 volt drop ).
3 volts / 0.46 volt = 7 diodes in series connected.
Use large 30amp or 80 amp diodes.
Using diodes for voltage drop is more robust than buck-boost equipment.
Using diodes to drop voltage allows you to operate small to large equipment up to 80amps at 18-12vdc
Example:
18vdc to 12vdc. to operate a 1hp well pump a 6 volt drop.
6 volts / 0.46 volt = 13 diodes in series will drop the PV voltage from 18-12vdc
100amp diode use QL100A
70 amp diode use 70HF120
Follow all IEEE and UL codes
*Samtec 120watt inverter will run your Laptop computer, USB phone charger,
or High Efficiency ceiling fan.
I don't agree. Diodes lose power that is dissipated as heat resulting in power loss. It's more efficient to have a DC to DC converter.
No power after sunset, Hmmmm.
Or if a cloud rolls in whatever your running just shut off. Kinda pointless without battery's.
@@johnmal5975Well if you have a well and a watering trough for livestock or a water tower the solar panel can pump water whenever it can and needs to fill the tank. The tank should hold enough to not run out before the sun returns.
Try getting out to irrigated farm lands and tell the farmers their direct drive solar pumps don't work
Until you get a week straight of clouds not practical for home use. I would imagine they have some sort of backup plan with battery's or generator for that scenario. One could have an insane amount of storage tanks as well and gravity feed however you would spend the same. To each his own. @@robwesterly5785
They use water pumps like these a lot in asia. I've seen them being used and they work great. For home use, it could be a fountain in a pond or an air pump.
I don't know math 😢
I use a 4000 watt diesel generator, which works at night, it works in the rain, it works when there has been no sun at all for three weeks, and it will power an on demand hot water shower head, or it will power 1500 watt microwaves, circular saws, planers, and sanders, a well as several light bulbs and my wifes sewing machine at the same time. . I can charge 4 life4pro batteries and use them to drive the refrigerator and lights all night or when we are away. eat your heart out. and no, its almost impossible to find household tools with dc motors.......and certainly not a wifi router or computer or cell phone charger.....
Thanks for sharing. Do you automatically start the generator when the battery is low?
Actually, most tool motors run on DC just fine, it's just more dangerous at the required DC due to arcing.
I too have a diesel that runs a DC charger to charge up my lifepo4's but it's too noisy at night, how do you solve the noise if it's an issue?
Mine sounds like a helicopter thumping away under load.
I'd like to make some kind of concrete enclosure or have it below ground or both.
@@mickwolf1077 you just need good quality ear plugs, that's it
Good for you buddy, you also gotta tote the thing around, buy gas for it, listen to the loud ass thing, what do you want, a cookie? Also they sell adapters that convert DC to AC so there you go
You're living in the past!
Not efficient. You will just waste your equipments
Running from solar directly is the most efficient way of powering a load.
😁😁😁😁😁😁 Useless :D
Limited use not useless.
Not helpful 😂
What do you expect the video to be about?
Excellent
So, you can have the lights on during the day but not during the night? It might catch on.
Who knows, maybe we can start a trend 🤷🏻♂️
Sex is better in the dark they say! Lol😮
The way solar panels are being installed from house to house in pakistan there would be no electricity crises in pakistan in the near future. We would be able to export electricity to our neighbouring countries as well. Well done keep it up.
@tahiranwar7812