Link to this transfer switch: www.mobile-solarpower.com/automatic-transfer-switches.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Does off-grid solar confuse you? Check out my DIY friendly website for solar system packages and product recommendations, and so much more! www.mobile-solarpower.com Join our DIY solar community! #1 largest solar forum on the internet for beginners and professionals alike: www.diysolarforum.com Check out my best-selling, beginner-friendly 12V off-grid solar book (affiliate link): amzn.to/2Aj4dX4 If DIY is not for you, but you love solar and need an offgrid system, check out Tesla Solar. Low prices and great warranty, and they can take your entire house offgrid with their new Powerwalls: ts.la/william57509 ~~~~~~~~~~~~~~~~~~~~~~~~~ My solar equipment recommendations (Constantly updated! Check here first): 12V/48V Lithium Batteries: www.mobile-solarpower.com/solar-batteries.html Solar System Component Directory: www.mobile-solarpower.com/solarcomponents.html Plug-N-Play Systems: www.mobile-solarpower.com/full-size-systems.html Complete 48V System Kits: www.mobile-solarpower.com/complete-48v-solar-kits.html DIY Friendly Air Conditioner/ Heat Pumps: www.mobile-solarpower.com/solar-friendly-air-conditioners.html Complete 48V System Blueprint: www.mobile-solarpower.com/48v-complete-system-blueprint.html ~~~~~~~~~~~~~~~~~~~~~~~~~~ My Favorite Online Stores for DIY Solar and Coupon Codes: -Current Connected: SOK, Victron and High Quality Components. Best prices and warranty around: currentconnected.com/?ref=wp -Signature Solar: Cheap Server Rack Batteries and Large Solar Panels: www.signaturesolar.com/?ref=h-cvbzfahsek -Ecoflow Delta Official Site: My favorite plug-n-play solar generator: us.ecoflow.com/?aff=7 -AmpereTime: Cheapest 12V batteries around: amperetime.com/products/ampere-time-12v-100ah-lithium-lifepo4-battery?ref=h-cvbzfahsek -Rich Solar: Mega site and cheaper prices than renogy! Check them out: richsolar.com/?ref=h-cvbzfahsek -Shop Solar Kits: Huge site with every solar kit you can imagine! Check it out: shopsolarkits.com/?ref=will-p -Battery Hookup: Cheap cell deals bit.ly/2mIxSqt 10% off code: diysolar -Watts 24/7: Best deals on all-in-one solar power systems, with customer support and distribution here in the USA: watts247.com/?wpam_id=3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Contact Information: I am NOT available for personal solar system consult! If you wish to contact me, this is my direct email: williamprowsediysolar@gmail.com Join the forum at diysolarforum.com/ if you wish to hang out with myself and others and talk about solar FTC Disclosure Statement and Disclaimers: Every video includes some form of paid promotion or sponsorship. Some links on this youtube channel may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. My videos are for educational purposes only. Information is subject to change/update at any time. Electricity is DANGEROUS and can kill. Be smart and use common sense :) DIY Solar Power with Will Prowse is a participant in the Amazon Services LLC Associates Program, An affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com

This is amazing piece of work. I have no more words to describe the awesomeness of this. Hopefully, a day will come in my life, when my electrical appliances will be powered on solar energy. Those bills will no more be a headache. Keep posting the amazing content.

I’ve been trying to work out what I’m going to do with my off grid system when batteries get low, thanks to your video on this device, I’ve now ordered one and am excited and relieved that I won’t have to worry about having to switch everything over manually in the middle of the night. Thankyou! Liked and subscribed

So many superb components that can provide maximum flexibility. Even as the system upgrades, if the initial components were chosen correctly, incremental upgrades do not need to be painful. As always Will, thanks!!!

Excellent information Will, I love the seamless transfer.

Cool. This is more applicable to my situation than I expected it would be.

The new ATS from them will be even better. It's going to have a manual switch as well that doesn't require you to mess with the cut off voltage. So if you notice your batteries are going down and you want to charge them already you could manually trigger the switch. Very useful for vanlifer's

Ok, hooked it all up this morning to test. Although I connected the battery input to a variable voltage power supply so that I could test its reactions quicker than having to wait for the batteries to charge or discharge. It worked like a charm. I monitored the power output reading of the inverter to confirm the switching, along with the mechanical relay sound that the switch makes. Pretty cool.

Been running mine for a year and it made my hybrid solar system 100% standalone

This is an excellent solution for those of us that have our small solar systems mostly for grid-down and power outages and just need a few basic appliances hooked up. Good idea. Thanks.

Unless I'm missing something, these cells seem perfect for my use case. I want to build a portable power system for low wattage 12V DC, maximum load maybe 100-200W, and that's including a safety factor, typical load

This is so cool! The automatic transfer switch is the answer I’ve been looking for! For all of the reasons you mention in this video. Love it!

exactly what I was thinking of today friend. thanks for sharing it with us. I set up my small solar system to power 4 freezers in the garage. my current two 12V deep cycles will only provide about 6 -8 hours of power. I'll get that up with additional batteries as this is still in testing mode but the auto transfer switch BACK to the grid is so common sense when 99% of the time the grid is up!. I'll can't believe there are not several options. thanks again for your fine work

I haved installed this ATS going on two years and it's working flawless.

When testing the ATS make sure that your Lower Voltage and High Voltage settings are Not too close because the ATS will flicker or switch several times between the inverter power and the grid power. Once the power is transferred to grid the voltage of your batteries will go right back up because the load is not longer on the inverter side and the ATS may transfer power back to the inverter This may happen several times in a few seconds and inverters that don't have a good protection board will fry! This will not happen if you voltage settings are far apart as for example LV set to 12v and HV to 14

Hey! Thanks! This video is exactly what I was looking for as I found that transfer switch on WISH. I am building a power wall starting with around 1600 18650s. I will now proceed to watch ALL your videos! Thanks man!

This is fantastic, I have the house with 1kw solar that is about to be replaced with 6kw plus 10kwh batteries. I will take the 1kw system to our shed and use one of these to connect this up with the solar from the house and another battery to run the tools in the shed and the swimming pool pump, it should never have to switch but an excellent option. Thanks for the review Will.

Excellent video and this looks to be just the gizmo I've been looking for (and the Amazon store ships to the UK, proper job :) )

Hi Will, First of all thank you very much for your clear and concise videos on DIY solar. It was your videos that finally made me move forward on my DIY project! Been doing a ton of research and finally decided to buy one of these to automatically switch over to utility if the batteries get low while I wait for them to charge. I am an Electrician specializing in AC/DC controls & relay logic. That being said there were a small % of negative reviews on Amazon, mostly related to the output relays failing on the ATS where both utility and inverter online simultaneously back-feeding the inverter from the utility. Potential results being taking out the inverter creating a potential fire hazard. I found a way around this and am planning to use this device to control a forward/reversing contactor with mechanical interlock so it's physically impossible for both inputs to common outputs to home loads to be online simultaneously. I can sleep better at night knowing that this non-UL device won't burn down my house. Although the chances of failure are minimal, it is still possible. I'm providing all this background information which will lead to my questions for you..... I ordered this ATS, One EG4 3KW off grid 120v inverter, One EG4 Lifepower 100ah 48v battery unit and an ABB forward/reversing 120v coil contactor with mech interlock, still waiting on delivery. In the meantime I was drawing out a diagram on how I will be wiring everything and something occurred to me. The EG4 inverter has an AC grid bypass which can automatically switch over to grid if my batteries get low. The grid power can also charge the batteries if there is not enough solar. My house has grid power available as i'm in the suburbs. Apparently the EG4 has a built-in ATS. It also has a dry contact output form C relay in case the batteries get low to signal/operate an external device like the forward reversing contactor I purchased. Also to note I will not be permitting this installation and laying the panels in my backyard which can be removed anytime. I was planning on not using the AC input on my inverter leaving either solar or battery power. My questions are: 1. Do I even need this ATS device at all? 2. Does the EG4 have a built-in "ATS" per se as it has a bypass? (discovered this while reading the EG4 manual). 3. Would it be best to just use this ATS with my forward/reverse contactor setup or just use the EG4 internal bypass/ATS? 4. If I use the EG4 as an ATS to bypass solar, is it safe with respect to the load simultaneously being online with the grid power? Sorry for the long winded post, hope i'm making sense. I have a feeling I purchased this contactor & ATS for nothing. Any advice as always would be greatly appreciated! Cheers, Alex

Great help! This product was exactly what I was looking for and ended getting it over at amzn. Waited few weeks and finally came today. - chris (Philippines)

This video was very helpful for concept for me. I have 4 100 watt panels with 4 122 amp hour lead acid batteries on my garage. My garage has a sub panel from my house for grid power. I wired this device directly through my 3 breaker sub panel box for power to my entire garage. Works like a charm. I will mention that I have never worked inside breaker boxes before. With the proper amount of research and safety measures, I was able to do this without an electrician.

This video, as with your other videos, conveys such positive energy that it motivates and excites my brain. I find myself smiling and laughing along with your contagious enthusiasm. I'd say you have great "preaching" skills, but I know that may offend your sensibilities. Damn Will, would it be so bad when what you preach is truth and touches people in a positive and helpful way. I'm not trying to offend, but you ARE the REAL DEAL!

Hi Will, I can break down my questions in the previous post below to something much easier. Hopefully my post will be helpful other interested users as well. After my post yesterday, I've done a ton of research and pretty much answered my own questions. Realizing I can use the EG4 Inverter as an "ATS" to use grid power if no solar or low batteries, I decided to go with an external ATS setup utilizing this Chinese MOES ATS as a "control" only to activate the coils to my ABB Forward/reversing contactor connecting my house loads to either utility or Inverter. I just feel this is much safer to protect the inverter and keep my 30A-40A house loads out of this ATS device and the EG4 Inverter. BTW I received this MOES ATS in the mail today and did an open inspection. It appears to be well built, all screws were tight preventing failure/heat however it is not UL listed and the load wires insulation don't appear to be rated for 600V like it should. The internal switching relays although fairly robust and i'm sure can handle 50A current, are not your typical 3pdt "beefy" contactor typically used in industry to switch large loads. The major flaw with this is they are using two separate relays connected to a common output. Should one of the two relays ever fail (And they eventually will) you will have the utility and Inverter outputs online simultaneously which you know can cause major issues including a potential fire.This is why I'll be using it as a control device and not for house loads directly. In my setup even if the ATS fails, my output contactor unit will never allow the house loads to be online simultaneously. Much safer! So this brings me to my one simple question for you: 1. Since I will be using the EG4 LifePower4 48V 100ah battery module in conjunction with my EG4 3K Inverter, what should I set the MOES ATS LV & HV DC voltage settings to switch from Inverter to Utility power? Someone suggested 44.8vdc switch to Utility and 58.4vdc switch back to Inverter. Please advise 🙂 Thanks!

Couldn't have hooked mine up without your video. Thanks so much. The instructions they provide with the unit are very poor. How you figured it out is beyond me. But mine is up and running and it is incredible. I don't have to worry about switching from public to solar anymore. It does it for me!

This is exactly what I've been looking for. I actually have a Reliance one for awhile now but just haven't hooked it up yet. Install looks fast with this one. . Enjoy your channel!

Hi Will - wouldn’t the ground already be connected via the shore/grid power? Connecting it again to the inverter when you’re already plugged into the outlet seems unnecessary. Also if this switch works in reverse (ie grid power down, automatically switches to battery) which I believe it does, does it island properly? Assume it does?

Great video, very informative! Now I just need to figure out how to make this charge my Tesla...

My Victron Multiplus developed an issue recently where the automatic transfer switch in it was tripped the mains power. I ordered one of these devices and just installed one a few days ago - works brilliantly. Thanks so much for the information

This is awesome! I was looking for something similar as a back-up on grid for winter months. Thanks!

Mr Prowse. I'm a huge fan, I got your book on Amazon. Love it! I want to ask you a question please. I'm in the information gathering phase pre solar plunge. I have everything lined out with the exception of one thing that puzzles me... I'm trying to figure out how to tie my solar system In to my fuse panel to power my rv? Please answer when you are able, and great job keep up the great work !

can this be used with a generator set up, or do you have any recommendation for something better

Will, what a great informative video! I love your tests, and enjoy the entire video immensely. I will place this one in my inspiration RV folder, which is a high 5 star rating.

I just love your video's because of the how to and shown to how to do it step by step. This product you just shared is what I have been searching for for a long time to be grid tied but to not feed back to the grid during a power outage...Love it. I guess the short explanation of how it keeps from back feeding into the grid is the power wirer source of the unit that picks up power FROM your house is shut off during a power outage and the unit will not even try to connect to the grid because there is no power....Hard to believe to keep from back feeding could be so simply Many thanks for all your sharing video's. Getting excited about Solar kind of reminds me when I was a teenager and discovered new found thrill of dating...BIG LOL and they both can hurt or kill you and with both you can end up broke.

Can this be used in reverse, can I use grid power and it auto switchs to solar in the event of a power outage?

DUDE THANKS A MILLION!!!!! THIS IS SOMETHING I BEEN LOOKING FOR A LONG TIME I BE ORDERING ONE NEXT WEEK!! YOU SAVE MY BATTERIES ,I KILL A FEW BECAUSE I DONT HAVE A CUT OFF WHEN THE BATTERIES ARE LOW

I just received mine. Need to do some work next weekend to test this. Thanks for the great video mate!

I bought this unit works great, smooth switch over, but it does not monitor the inverter out put, because if the inverter goes down it stay with the battery side, shame it can’t detect ac voltage has failed on the inverter side! Ar well maybe they include this in their mk2!

Dumb Question: is there something like this, but the reverse, that switches to batteries when the grid is down? (yeah, I know, I'm in the wrong place...this is for mobile, not residential...)

Installed!!! and working great. I like when powered off it goes to grid power. Hope your getting a kick back from the company. Thank you!!

This is FANTASTIC. I'm building a solar trailer, mostly for power outages, but it's going to be generating power all the rest of the time too. Been looking for a seamless way to use that power on a daily basis, and this looks like it'll do the job.

Yes it looks well constructed, handles heavy gauge wires. BUT has anyone looked inside, the unit has 2 independent relays rated 250vAC 50A / 24vDC 50A there in lies the concern. If a single relay should fail half the circuit will be on the Public Power feed and the other on the Inverter feed with all grounds tied together. Also no two relays will switch exactly in sync at the same moment. Not much in the way of instructions, no UL/ETL/CSA certification, just FC CE (China Export) on front. Also no tech support info, address or mfg. contact in the documentation or on the physical unit. Anyone experience a relay failure or issue with switching operation?

I'll pass. Lol.

Just bought one off of Amazon. I should have it in a couple of days. Excellent video, thank you Will, you rock.

This is exactly what I need for my off grid setup. Thanks again Will. I am planning to use this setup especially for my air conditioning unit over the summer.

I got 2 for $60.99 each on AliExpress. So basically got 2 for 1. Already got the first one and it works perfect. Thanks to this video

A lil late for an electrical consultation, I messed up and stuck the fork in the electrical socket again, other than that great advice!👌

In Texas, having a hard time keeping power on reliably with grid :/ Your videos are really motivating me to put something together for backup! Thanxs for sharing :)

I love your videos ,absolutely brilliant. You are passionate about your thing,keep up the good work

Every time I think I’ve watched them all, I stumble across another gem!

watch this vid got this Automatic Transfer Switch set ATS up its works a treat

My solar/battery system is running my house ring main and lights, and right now the battery level has fallen off because the excessive cloud cover we have had this week, for the first in 10 months the system is not running. This device is just the ticket for sorting my problem out, even though I am adding more solar to the roof to help over come this problem, this device is just what I need, thanks Wil ! Update, Will, have now ordered one of these units £100 off eBay, that’s about 80 in your money!

Hi Willis there also a switch for solar battery charger to grid-tie inverter when the battery is full. Ps thanks for this tip it helps very much.

I just got one of these love it so far

Great Video Mate, this device is exactly what I need and appreciate the nice walkthrough!

Hi Will, I've found your videos to be extremely helpful in getting me from a novice level with no understanding to feeling semi-confidant while I listen to you discuss topics. Could you please address if an ATF would function with the Titan system and how that would be setup. Many thanks!

These are an excellent unit Will, have been experimenting with it trying to get it working in reverse will share what i found out. Firstly the device will automatically switch to public power > output when powered down by default. Initial step only needed once - make sure the display shows the left arrow Output output setup and voila. a simple ups. To return to normal energise the unit again using the same relay to feed the unit once again and it should remember preset settings and switch back to the inital position. Sounds long winded but it does work and well. Cheers, Steve.

I didnt have time to watch the whole video but this looks great from what I see. I'll have to come back and take a closer look along with my own research on this product. Thank you

Just bough this from Amazon on your recommendation....great video

This is exactly what I need. Two thumbs up.

Awesome. Great for cloudy periods.

Love your stuff, please keep it coming.

I enjoy attending Will Prowse University Classes. Great job on this. I NEED something like this to reduce the expense of my AC unit running up my electric bill in the summer.

An amazing wealth of information. Thank you, Sir.

I learnt a lot from you man. Thank God for you!!!! God bless!

That's something I've been waiting for, will build small solar system this summer:)

Learning how to do this to save money and do it myself. This is a big help thanks! :)

Beautiful system, Will!

I like the idea of the inverter with built in automatic transfer switch.

Good Morning Will….. I’ve been learning a lot from your videos and have been purchasing components based on your reviews, I’m needing to purchase a stand alone, auto gen start…..my system is being built on a utility truck. 12 volt, 6 deep cycle lead acid battery bank, will have two solar panels on the roof, possibly going for 250 watts. I have the DC to DC charger, and the solar controller you mentioned, but my utility bed will have a dedicated 4,500 watt generator built in, and need to be able to top off the battery bank if it gets low

Thank you for explaining this!

I bought this based off of your video, seems good with the exception of one painful issue. If your inverter errors or something it will not switch back to grid. That would have been the perfect missing feature.

Bad ass, thanks for all the do it yourself videos.

I have learnt a lot from you, keep up the good work

I have been using this swtch since I wathced your video about a year ago It works great. The only commetnn I have is that it measures the battery voltage about 0.5 volts lower than so I have had to set my min and max switch voltage accordingly.

I don't think I'd ever seen anyone get so excited about an automatic transfer switch 😄 You gotta admire the kid's enthusiasm.

Thank you for all your videos man they have really helped me understand this a lot better. I’m expecting a titan generator and I’m trying to figure out if i can hook it up to the house, use it all the time and automatically switch to grid when necessary. If you or anyone can point me in the right direction i will really appreciate it.

My friend firstly congratulations for your videos!!!

You are great. You make it so simple!

So fun to watch your stuff! This is just what I need to learn about right now, since I'm scrambling to get a backup system in place for the rolling outages that seem to have started already.

Thank you for showing me that...Great video!!

Thank you so much for your informative videos.

I just did it. Solid.

Very nice ,thank you for this information .

This is perfect for me! Why haven't i heard of this when i have been trying to find something similar for years :D

Hello Will, Thank you for the explanation and the time you take to make these educational videos for us that are still learning how to connect a solar power system. My question is: 1. Can this ATS be used with a generator, if not what transfer switch can i use to charge my battery if my battery is depleted. Where I live there is no public utiity electricity. Hope to hear from you soon

What voltage would you recommend for my 12 v sealed lead batteries to cut off and come back on? This seems to be a good device

Nice demo. Great demo.

Nice addition to your grid-tied RV, Will! I’m wondering if this would work with a Kodiak since it has external battery terminals for connecting extra batteries, which can also be used to sense its internal battery state of charge? I’m a house dweller and I'm thinking of getting a Kodiak and a few panels for emergencies and just for fun. I might as well put it to work on the refrigerator and nearby kitchen appliances.

Well explained. thank you

That's really neat. You could probably modify this to start a generator too if you were fully off grid. Or use it without a secondary AC source just to save the batteries from over discharge. Been meaning to do something like this with my shed's solar setup since right now if the battery gets too low the only thing that will save the batteries is the inverter itself shutting down, after beeping loudly for a day or two. LOL. I never let it get to that point though. Arduino can be used to do lot of this stuff too and it's fairly simple. I just need to sit down and actually do it.

i have been looking for a way to run 12vdc or 110vac without using a manual switch . this is ideal .mine will be here tommorrow , thanks for the video .

I learn a lot from you !!

Hey Will, Ran across a neat product you might want to check out. Gardner Bender Liquid Electrical tape, you paint on.... limited applications but maybe gives you flexibility in situations where it is hard to wrap regular electrical tape around a wire, where physical access and space is limited. They have two colors, Black and White. Cheers

Well done Will!!! :)

haha, the excitement on your face when the ATS switched supply 😀Thanks for this video

This video made me so happy! It taught me how to do what I wanted to do, like your videos usually do, but it also made me so happy to see you get sooo excited this time! me too, bud. this sh*t is lit One question I have is how you attached the three green ground wires to the little black one that you used to extend down to the earth ground on the inverter. It seems like you just used electrical tape? Something I've been wondering in general is how to do exactly that - how to clump the wires together so you can just have one extension? :) I'm so thankful for your book and channel!

Hi Will great video just the kind of device and application I have been thinking about. I do have some concerns with feed back into public power. Have you tested or could you test for any voltage on the public side in the event that public power is off, by disconnecting the rv from the grid and simulating a grid power failure. Thanks Tom

Thats so cool, im looking to do my 1st build, to what size w solar panel can this take max, and can you use a wind turbine on this as well. Thanks Rich

It Is A System That I Can't Use In New York City However I May Be Able To Use It In My Florida Home!

This is basically what you call a UPS. Very intricate UPS but still a proper ups with good transfer times