Growatt MIN 6000TL-X: DIY Friendly Grid-tie Inverter!
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- Опубліковано 7 лип 2021
- Affiliate link for this inverter: signaturesolar.com/products/c...
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Please do not compare this unit to a sol ark. Just read some comments below doing just that. Sol ark is 5X the cost and is a hybrid inverter. Not a purely grid tie inverter. This unit should be compared to comparably sized enphase or solar edge grid tie inverters. Not a sol ark.
And growatt is bigger than most realize. They are UL certified and some are listed units. I can discuss further the differences, but don't let the price fool you. And neither growatt or signature solar paid me to say this and I'm not on contract with anyone. Don't listen to UA-camrs and do your own research about each company I mention.
~~~~~~~~~~~~~~~~~~~~~~~~~
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
~~~~~~~~~~~~~~~~~~~~~~~~~
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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
Yes
Okay
Yes
A claim of UL conformance is not evidence of UL certification. Note that tying into grid absolutely demands compliance with codes. The codes address the MINIMUM safety concerns.
Sol-Ark is a US veteran-owned business, an engineering and manufacturing company in Parker, TX, focused on
Is this one or other grid tie in inverters stackable?
Definite yes on a microgrid system video.
Yeah I'm looking forward to that video!
Yes Will fantastic, an experiment using two growatt 5000es in parallel as the main grid and this inverter as the gridtie to boost the capacity will be Spectacular.
Yes, yes, and more yes.
Agreed. Sub'd and waiting for micro grid suppliment
I have one of these systems installed on our house here Florida, when hurricane IRMA came through it was easy to trick the system online by disconnecting the main breaker on the house, then flip over to the generator input and use the generator as the source for the solar system to work. It basically idled the generator in fuel saver mode using barely any fuel while solar was available, but partially used the generator during periods of cloud cover and such. This setup is far cheaper to maintain compared to solar battery setups because we didn't have to invest in a large battery bank and solar charge controllers to store battery power, we just purchased a good quality generator instead.
Very nice way to be prepared. !!!... Just wondering: Do you have this set up as grid tied in Florida, for putting excess PV electricity into your grid when the sun is shining, and see an accounting of that on your utility bill? If so, I would love to hear about the hoop jumps :+) ... I know my California State has too many hoop jumps to allow this one; while (I thin) requiring maximizers or mini inverters that can turn off all solar panel voltage on utility command, and for firefighter protection when there is a house fire.
@@CaptBill69 I personally didn't deal with the actions and loopholes getting the initial system online and the only month I have ever seen a credit on my account was the first months when the house was still being finalized and I was not fully moved into yet. The builder installed the bare minimum setup with only a pair of solar panels on the roof, but I accounted in the electrical wiring for future upgrades, because I didn't have the funds to fully fund it all at first and just wanted them to install the initial setup with 800 watts of solar on a 6kw 240v grid tied setup. The rest of our solar system never made it ontop of the house as I didn't feel comfortable adding them to the new roof myself, so I ground mounted them on bracing and pole system. In my area when I did get the credits, I was only credited $0.01/kw, so it was not worth my effort to add more solar than my production, so I just kept adding solar panels over time until I nearly brought my bill down to the bare minimum. In my area we have staged tiers of electrical use, the first tier is the cheapest, so my aim was to maintain our monthly bill within this tier to get the most benefit out of it.
@@williamhustonrn6160 ... Thank you for the details. Re: your "... only credited $0.01/kw" get changed to encourage more solar. IMO: That is sign of those in power discouraging solar, and/or afraid of loosing their monopoly like powers (combined with their view of challenge to deal with grid swings (like after the sun goes down). I am looking forward to seeing more edgenuity in these lines of less expensive All In One Options. This one you have looks like a tech jump up from many of the others from my view.
Does this unit support zero export?
@@CaptBill69 Not a problem, i understand there are hurdles and loops when trying to get solar hooked up in all areas, that is why I had the professionals take the stress of getting it setup and installed to code and standards. My plan from the start was hookup the bare minimal PV input voltage the solar system would run on, then oversize the inverter and wiring for easy upgradability going forward, because the headache is all in getting the initial system installed, upgrading from there is stressfree. I had experience with an off grid solar system prior to the grid-tied and had all kinds of headaches with a MAJOR battery manufacture that this channel even highly praises with multiple failed units in under 2 years, but I am leaving out the manufacture to not muddy up this conversation. I just knew I didn't want to go down that route again and deal with batteries again at this current time, my need for offgrid use is purely only needed maybe a few days a year, its more of luxury to not have to worry about loosing power when the rest of the grid goes down, my main goal in all of this was to offset my electric bill and hopely have a near zero bill in the near future once the system paid for itself. Well myself not only did this, I reduced my normal monthly bill and earned back what I had in the system in 26 months by going from a normal $400+/month bill to now my average bill runs between $35-45, because the minimum fee to have the grid still hooked up is $35/month. I only installed enough solar to reduce my bill as close to 0 as possible, because when I learned how little I get back in credit, it just was not worth my effort and time building anything larger. Plus a major savings was doing the addon of additional solar myself.
Would love more grid tie + net metering videos. I didn't even realize until recently that you need a different kind of inverter than for an off grid system
I have had this running for 4 years now its great
The two input is nice if you have a east and a west roof, or if you want to have one array on the roof, and one on the wall. Wall mounted is nice for winter in the north.
I'm setting up my first long term off grid camping solar system. Thank for all the information..
Hello Will, an experiment using two growatt 5000es in parallel as the main grid and this inverter as the gridtie to boost the capacity will be Spectacular.
Can 2 inverters like this work in parallel ? If so how could I add a second one to my system ? Do I need to change settings ?
Yes, I love when things are *Both* super fun & super legal.
Interesting Grid tie system. Tiny thing. Thanks for sharing.
Will, you hoped I liked the video? ? ? ? I LOVED the video! Thank You Sir!
I am glad toward the end of the video that you mentioned the anti-islanding safety feature!
I love it!!..as usual...I'm watching and learning!!...thanks Will!!👍😎
Would greatly like to see how you supplement your off-grid system with that. Hopefully a video is coming soon. Thank you!
😀🔆 Hi Will, love learning from your channel. I barely get enough 🔆🔆🔆 in Wales U.K. 🏴 to charge my generator let alone use surplus for the grid. Stay safe. Rog. 👍😀😎
heya Will I have a grid tie inverter from growwatt myself, did the unpacking and uploaded to youtube still have to install it here on my house here in country (Holland) hope I can do that in the next days
Thanks. Interesting. Comments brought up some good points.
Very cool sounding unit.
Looking forward to the micro grid system!
I was thinking of doing a off grid shop and grid tie inverters with limiter (ct sensors) at the main panel to supplement the house power.
Growatt 48v split phase
GTIL grid tie 1000w x4 (battery discharge)
310w panels x12
230ah raw cells x16
Customize all poramitoers for light use.
Your channel is a inspiration to everyone. Thanks.
I spoke with Growatt and their Inverters can only be used with two different Storage units, and ONLY these two: ARO Battery ARO 6.6-19.8H-C1-US or the LG Battery RESU10H/16H Prime.
@@CptCanuckaNunChucka They need to have communication with the battery BMS is that just nice to have? Good information was just about ready to pull the trigger on a 24V growatt I have 2 cheap amazon 12V 100AH life batteries I got on Amazon prime day. I went back looked at the manual sure enough says if you choose Lithium have to use a battery that they approve can connect the BMS to. Glad I saw that I was real close to buying.
Another great review; nice work.
Was debating the cheap micro-inverter tie ins that are surfacing now.
Interesting to see a South African product in the U S.
I am from South Africa, and we also have a company blue nova who manufacture Lithium Iron Phosphate Battery's Thanks for great info videos!
The ETL listing will work in lieu of UL listing. Thats what Sol-Ark and others have. The thing to look for is Rule 21 for California. Even at that it would make a good replacement unit in California for older SMA's and others
Mendo is correct. The code only can specify that a nationally recognized testing laboratory (NRTL) be used to list a product. ETL is a NRTL. You will have no problems connecting this in jurisdictions following the NEC.
Will be interested to see what happens when you connected it to a micro grid but I have my doubts it will operate. The mains grid and micro grid are quite different beasts.
Hey will
Not sure if it’s possible but could you make a video using this grid tie unit in combination with an off grid unit? Let’s say the spf 3000tl lvm-24p. Love the 3000tl unit but the max 2000 watts is very limited. I know you can parallel it with another unit for 750 more but I think it would be more economical to add this grid tie unit and double the solar input. Would love to see this in a video. Most economical way to have 5000+ watt system with out multiple units or 48v systems.
Thanks love the videos !
Exploring micro-grid grate idea
So hey Will, I guess I can use this in a off-grid capacity with a gas generator in lieu of being on grid correct?
Only issue when using on a microgrid is the inverter needes to be reversibe (be able to send power from ac to the batteries seamlessly).
Great video earlier. Still thinking of all the young that could be the next Edison if they put the phone down and read. Keep up the honesty. Peace
Try AC coupling this Group Watt 6kw unit to your office grid system.
Hello Will, really enjoy your reviews and appreciate your insights into solar installations. I have the Growatt MIC 3000TL-X purchased from Signature Solar which I want to use grid tied. I have been unsuccessful getting the export limit function to work. Online information is scattered at best and not useful at all. I contacted Signature Solar but couldn't find anyone that had practical experience (more than just reading the manual to me) with the export limit feature. Have you ever tried using the export limit function successfully?
GroWattt's Spec sheet for this unit says: "Single phase" and "230V (180-280V)" with no mention of 120vac in spec sheet; while that Sell page says: "120/240V Grid-Tie Inverter by Growatt". Does this unit work on 230v usa split phase ??? and power both legs of a standard usa slit phase breaker box? Something does not make sense to me; and I request clarification. :+) Bill
You’d have to purchase a mid point transformer to get split phase 120v from this inverter.
Would love to learn more about this.
Can you show practical use of a large 24v battery bank/inverter system and how best to stepdown 24 to 12v for use of regular appliances?
I’m looking to use a unit such as this to help first reduce overall energy bill it’s month as well as potentially put back into the grid. Person that is looking to start off with a retired unit how would you rate this overall as opposed to others that are on the market? I know it’s hard to compare other brands because each one has their own pros and cons, however for this I would be simply looking to be able to offset my current power consumption with the ability to add onto the system which looks like this inverter is spot on for one I’m looking for. Thank you and love the videos, very informative.
Would love more grid tie vids 😟👍🏻✌🏻🇺🇸
It’s getting to the point in some areas it’s better to be off grid. The utilities only take when they need it since they have control now on recent approved grid tie systems . They also regulate how much solar and where it’s placed. A friend has had it with the permit process because of time, inept inspectors(they don’t know the rules and want to break them), and changing their minds after the permit was granted so he has to “eat” the changes. He now only does off grid and possibly a transfer switch depending on county.
Will-what do you think of the Silicate-Salt batteries as an alternative tp Lithium-iron-phosphate batteries? Have you tested any?
bro please make more grid tie content! i need to lower my PGE bill. i wish there was the ultimate guide to get a grid tie system to zero out PGE bill.
DIY Solar Power With Will Prowse I built 2 small 12v systems 400w one awhile ago following your blueprint. then 2 months ago I bought 2 Epever 100amp charge controllers mppt, and I read the specs that it can take 1200 watts of solar. how can I string the panels or setup to get that amount of 12v panels I have 15 100watt panels right now. or do I need to get bigger panels like 24v ones. thankyou in advance. your videos have helped me learn so much about solar.
Newbie Q who would I contact to find out if I could use this on my small house here in Florida? It sounds like this would be the answer to my DIY solar system. Later I will buy Battery's but for now this would work great. Thanks for the info.
Hey Will, Do I need to get the power company involved if I installed this unit ?
Need that micro grid video!
Can you explain more on the microgrid, I thought microgrid is only with batteries. Looking forward to know more about that.
Hi Will,
Can you give us some more information on the CIGS flexible solar panels? I can’t think of a more important panel for van dwellers and travelers alike. I currently have glass panels on the roof of my van, and they weigh a lot. I just wasn’t willing to have the crappy flexible panels last for 2-4 years. Any and all tests will be appreciated. Thanks. Happy 4th!
When the main grid Power is off that time can I run this by giving reference voltage from off grid inverter?
How many 405 watt bifacial panels can I use with the Growatt Min 6000TL-X and do I need anything else to keep it safe?
Thanks for sharing.
Does it work in Nevada? Microgrids, very interesting! Grid tie inverters with limiters work flawlessly with microgrids.
I'm very interested in the microgrid subject, especially about using export limiting to keep output in line with demand.
It would be *extremely* interesting if the grid-forming inverter can do frequency-watt control of output. Rule 21 features seem to me to have very interesting applications in a microgrid..
I have chinese 300a litume battery and cheap 4000w inverter installed in my camping car. When i try to use elec induction for long time, the 220v inverter doesn't work. When I changed inverter cable with thicker one, it get gets better but same situation happens. Should i change the cable with thicker one? Or any other way you recommend?
Do you know what is its performance during low light conditions? Cloudy/ foggy days? I noticed some inverters struggle to start charging while others simply start early from 1 watt production ...
Looking at these today. Want to power part of my house off of one of these and the high powered stuff like A/C off of grid. Do you have an example of that type of set up some where?
Liquid nitrogen turbines cool and generate power like fuel cell water heaters did. Excellent if cooling load is large enough!
Pretty cool, but does it have a limiter function? I presume it kills power if the grid goes down, but can you set it to keep it from backfeeding?
Same thing I want to know. I will be calling them to find out!
Could you do a comparison between this inverter and Huawei SUN2000 KTL-L1, please?
I just one of these units from Signature Solar based on this video. it looks cool but two problems (1) no english documentation and (2) it only mentions 240V and shows a L/N/PE connections and mentions nothing about split phase or L1 or L2 so I am not sure if this is for Australia or if L/N/PE can be configured as L1 and N=L2 and PE is N. thoughts?
Unfortunately in California we have to use UL1741 SA (otherwise know as Rule 21) grid-tie compliant inverters. Rule 21 basically requires the inverter to be capable of riding through grid excursions or even actively managing grid reliability functions via a communications protocol that the utilities can use to directly interact with the inverter. Interestingly, the standard is still in development yet somehow the manufacturers are supposed to know in advance how to design the inverters to be fully compliant sometime in the future. Go Figure.
can I foul tie inverter and coupled with modified wave ac source like with ups to keep it active when power is down?
Will has so much electricity he can create a sub-grid from his grid! Love it!
Hi, I just read the spec sheet of this unit, it is a 240VAC single phase (with 3 wires). Are these wires L, N and PE or L1, L2 and PE? It they are L, N and PE, then how do you connect it to the US power grid? Thanks in advance for your help! Thank you.
Do you have a channel you recommend that covers grid tie solar?
I second yes on a microgrid system video. $$$
Any written confirmation or letter of 1741 certification? Being able to compare input efficiency is too cool for school. Thanks
How I can split phase this inverter to connect it in my breaker box?
what additional hardware do you need to add to add battery storage?
Did you made your off grid system and supplemented with grid tie?
I saw there's a TL-XH model that can be used with a battery system. It seems that it's only compatible with a Growatt ARK-XH battery or am I wrong?
So I was thinking of using one in my off grid setup so that when the batteries are full, it uses the power from the solar panels to reduce battery usage using the Mppt load output . Is this roughly what you were thinking? I really want to try this method but not really sure how safe it is.
Good day, how do I set up a limiter on this grid tie inverter?
Super fun, and super legal! Yippee!
Quick question, could I have two of this inverters connected on the same house ?
Great channel! does the MIN 5000TL-X inverter have two independent MPPTs? Can I use the maximum input voltage
550V DC from each MPPT, adding up to 1100V?
I have a similar question, can the Pv inputs not be in balance with each other running at different voltages within the allowed parameters?
Hey I am in the USA is this model of inverter form signature solar a split phase ??? So 120/120 and a neutral?
Hey what do you mean by using it on an off grid grid?
I need to know, thanks.
Hi, where to connect battery storage?
I live in mexico, I just installed a min 6000tl-x inverter (only 1), it stay in standby mode so I pressed factory reset in the front panel menu (now I know it was for the poor sun light), I need to know what is the correct configuration in the voltage protection 0,1 or 2, and in the interlock 0,1 or 2, and power sensor on or off, please.
I have watched a lot of your videos. Thank you very much for this information. Please help me understand. Do I need permission from the city or anyone else to build an off-grid solar system? What questions do I need to decide before starting? I live in California. Thank you.
Is the ac output 115v or 230v?
1.27.22 Question: What 3 AC terminals on the growatt connect to the red black white ground of the 240v S O cable?
Did you figure it out I just got two of these in the mail the other day and I can’t find an answer thx
@@jcb1989 12.21.22
Yes, I do have my GroWatt MIN 6000TL-X functioning. What I did was put on a load breaker box. I have 2 double pole breakers in it. One is a 50amp (this goes to the main panel in the garage red, black, white, ground) and the other is a 20amp. I used romex orange 10/2 awg solid wire. I hooked the black up to one side of the breaker and the white to the other side (I wrapped some black tape on the white wire to indicate a hot wire). So I have 120+120=240 volts. I hooked up the 3rd wire to the neutral bar inside the box.
On the Min 6000TL-X ac in I connected the black to L the white to L2 and the 3rd wire to the Neutral. The power ac in on the Min 6000 is a 3 wire connector. I looked at this connector for markings as to where to put the wires. The connector used really small screws. The markings are also small. I thought I took a picture of it however can not find it now.
I looked at the users manual at the ac picture. Does not explain much.
Did not get any help from Signature Solar when I asked for help. I even asked if they would do a video on install the MIN 6000TL-X.
I have 3000 watts of solar panels also connected.
can you do video on grid power limiters on inverters
Will, I am curious as to why you review alot of product from Growatt, but haven't seen a review on Deye inverters. They are a great all in one inverter too.
Have you looked at Sunsynk inverters?
@DIY Solar Power with Will Prowse VIDEO REQUEST Hey Will, you talk about the benefits of MPPT Chargers where you can custom set the top and bottom voltages allowing use of used and Grade B cells. I have been looking at chargers for a truck camper to work with Aliexpress cells ordered from your website link and they all seem to have preset charge profiles for the basic chemistries. How about a video comparing various chargers (BMS?) explaining which allow user programming of charge voltages and cutoffs. Thanks for all your hard work!
The instruction book doesn't cover my previous question... wth BTW - my Min 5000tl-x is supposed to put out 240ac split phase...
Can you test that 6kw claim!!!?
Why not hook this unit up as a grid input to one of your hybrid inverters? Mount it, wire up some panels (like you said - in a single string) and then connect the AC output to the Grid input of one of your hybrid inverters. Wouldn't that work? I might do this instead of adding another CC as I want to do high voltage input from panels due to distance from my equipment room.
I should add that I went all-in on Schneider equipment. A CC that can handle that much DCV is over $1k. This seems like a no-brainer for me or do you think the losses will be too much?
Great video.
This would work great with a neighborhood or building sized peer-to-peer network.
I'm trying to get my hands on a unit used in Australia and Bangladesh that enables an off-grid peer-to-peer network for both generation and purchase of PV electricity.
Company is SOLshare.
That is so cool
I have a workshop that is detached and would consider this with some battery storage to run the shop separate from my house.
You'd need an off grid or hybrid inverter. Totally the opposite of what this is.
I wish that a cost friendly grid-tie inverter with limiter circuit. With the limiter circuit it could be installed, under the radar, and only provide power to equal the usage within the home.
Have you looked into testing a ark battery 🤙🏻
Looks like it is UL1741 Complient now?!?!?! Tyring to do a grid tie system and I live in Maryland so I believe it's gonna need to be the highest standard.
is it possible to reset the amount of created Power (Reset to Zero) ?
Do you have any experience with high-voltage solar panels? I obtained a used solar panel with a 132V open circuit voltage. It appears to be a 90V 90W panel. this is purely based on testing. once I exceed 90 Watts of draw the voltage Drops in a hurry. My goal is to come up with a solution so that I can charge a jackery 500 with it. I thought about trying to use a DC to DC buck converter but I cannot find one that will handle that open circuit voltage. I do not think a charge controller will work because the jackery does not put out power on its charge port. Any ideas would be greatly appreciated.
@terry m : honestly, the best idea might be to just get a lower voltage panel appropriate to charging your Jackery. Yours sounds like a rare animal to have such high VOC and in my experience trying to adapt something to the degree you describe is not going to be worth it.
What if you don't connect it grid... What if I want to use it to convert my 400V EV batterie to 110/220v? Would that be possible?
I'd like to see someone get something like that to work, but I spoke with Growatt and their Inverters can only be used with two different Storage units, and ONLY these two: ARO Battery ARO 6.6-19.8H-C1-US or the LG Battery RESU10H/16H Prime.
If she is avaliable.. I'm in !
Can they be mounted outside?
This unit i not UL listed and therefore can not be used in California!! Any similar low cost grid tie inverter will work in California?
Will would like to know the results of your private micro grid testing. The Growatt is going to look for stable 120/240 at 60hz power before connects its output. It will first sample the AC connection and look for a signal, then it will sync up its internal signal generator its inverter sine wave matches that of the line. Secondly its likely to do some line probing tests to make sure its connected to the grid and not some stray leakage current. Finally it will likely monitor the line for a few seconds adjusting its output voltage to the attached network then finally connect and ramp up the current to what ever your solar input can support. It's quite a complex process. The issue with a small private (not network attached) private grid is you have to provide the initial startup voltage from a second not grid tie inverter -- sort of faking a real grid. This issue here is a real grid has lots of what is called "Grid Inertia". What this means is no matter how much current you push to the grid the grid voltage is not going to change. This is not the case with your private micro grid which has zero inertia. Without the grid inertia the entire setup would likely be unstable. Without schematics and the software code to examine you will just have to test it. Lets say you have enough solar input to allow the Growatt to push 20 amps to the grid which the real grid would gladly accept without issue. It does this by raising the output voltage very slightly until 20A is flowing then adjusts the output voltage to keep 20A flowing as the solar input or Network voltage changes. But on the private grid, the Growatt would keep raising its output voltage higher and higher trying and push that 20 amps to your private grid. Since your grid can't take the energy the voltage would increase to it likely over voltage faulted the Growatt.
Grid tie inverters are constant CURRENT AC sources, (also thought of as constant power devices given a stable solar input) They provide a constant AC current to the grid by finely adjusting the output voltage or phase to keep the current constant.
Normal inverters are constant VOLTAGE AC sources. They provide a regulated output voltage independent of the load. Thje current and power supplied are determined by the attached load not by the inverter.
Only way to know is to test it. Try starting it with some loads resistive and motor (provides some inertia) on the inverter then try and attach the Growatt. Don't let out the magic blue smoke -- all electronics run on blue smoke, let it escape and you killed the device.
What would be a good first-time purchase/setup for something inner-city to use for a condo in case of a black out, etc? Run a hot plate, small toaster oven, etc?
Amazon sells small one-burner butane stoves. Just use them outside when cooking (not inside). Heat draws a lot of electric so you would deplete a simple battery bank before your food was cooked.
@@keezer4346 Thanks, that's a fantastic idea! The biggest problem is that the condo doesn't really have any open-air spaces so it's quite limited that regard. I had considered like a Coleman stove top or something but, again, using it inside was a concern, especially during the winter.
Unfortunately, I may have to consider getting a small bank specifically for running something like a single burner cooktop.
Was considering something like the Jackery solar panel as it's portable and seems rather easy to adjust but I hear there are much cheaper alternatives. Trying to figure out the best mix of cost, size and functionality for a relatively small space (solarium).
One of the main drawbacks to a grid tied inverter is that if the grid goes down, the inverter shuts down. So not a great choice for the scenario you mentioned. I use the 3000w model of this inverter with 8 250w panels and save $2 a day on electric bill.
Any good gridtie inverter producing 110V?