Why is this the first time I hear about the interesting DC and AC battery setup, and of the oversizing of panels? Sounds kinda smart to be honest.

Shocking value given for free. so well explained. Gary deserves 20X more subscribers.

We recently installed 31kWp of panels for a house which only had a single phase supply and therefore a limit of 17kW could be connected to the grid, but we were able to use 17kW of SolarEdge inverters and oversize, works really well!

WOW I cant beliive this video has come out today, my system has come online today and my installer recommend a 6KW inverter for my 8.1 kw total panels and 10.5 kW battery system and this video has proved him right.

great easy video! another positive thing with oversize array is reaching faster the minimum input voltage of the invertor so that helps getting more solarhours usefull

Well done! The only thing I think you missed was that oversizing the array also changes the shape of the curve (same orientation) by allowing more production earlier and later in the day, as well as in cloudy conditions. Basically it will produce more earlier and later, adding to total output or area under the curve...

Thank you so much Gary. I have only just discovered your channel with this video. I installed a 5kw array with 5kw inverter a few years ago. My needs have changed dramatically since then. I now have an EV and battery and combined with a pool pump and upcoming heat pump install my system can no longer cope. I’ve been trying to find an inexpensive fix and your video has been a God send. I did not know this was a thing. Oversizing!!!! Wow. I’m a man on a mission now. Many thanks again. I’m now an avid fan and subscriber. So many more of your videos need watching.

Found this excellent channel today. Going to be 8k inv 12k solar ratio in a month. All my upgrades this month are engineered for winter production, 2x 2790w to 3255w, and a new 3300 array PV2 remains at 2790w. As a whole 8370w to 12600w, the 2790's have peaked at 3514w (vertical bifacial) with this set up I expect the 3300 will max at 4000. Overcast winter estimate 3200 watts total and should give me the 14.6 kw I use daily. I dealt with 105 days of overcast and fog. November 2023, 4 hours direct sun for the month, December was 8hrs and January at 13 hours, 3 months 25 hours of direct sun. My inverter was silent for months. In heavy overcast pv2 a 2790 array produces a minimum of 580 watts. Bi facial panels are mini black holes.

I’m planning my own system, and currently working on sizing based on the system input, and panel configuration. I had come to the same conclusion to over-provision on the PV side, and this video further confirms this industry standard practice. I’ve been playing around with a single 100W and 400W panel as a proof of concept, and I’ve personally seen examples of everything you’ve described. Thanks!

What you described is probably the solution with the highest possible available financial ROI at the moment. We need to supply power in the morning and evening (see duck curve). We do this by placing panels east-west, not toward the equator. It matters little if your setup harvests relatively less power around noon, because power will often be cheap if not free or negatively priced at that moment anyway. Oversizing works especially well if panels are cheap and inverters are expensive, which seems to be the case. I heard from a source that I consider reliable that panels HALVED in price over the last year. Prices of inverters seem to have changed very little over the same time period. NB: It’s important to look at your *actual* expected peak power. 25 panels of 400 Wp each placed east-west probably won’t ever actually produce 10 kW, especially if you’re farther from the equator. If you have a DC-coupled battery you can get even more power out of your inverter.

Very helpful and detailed in an easy to understand way , many thanks.

It was interesting hearing the solar energy requirements in the UK. In the US, most inverters for residential use are sized around 15kw with many being twice that size. A 3kw inverter would be something you would choose for a tiny off-grid cabin. My local utility sets a maximum of 17kw for a grid tied solar system.

Be sure to get battery storage because selling your excess generation of electricity to the grid can really suck if they buy it from you at 5 cents per but sell it back to you at 40 cents per when you need it from them.

This is a GREAT information! Thanks for posting. 😃

Nice one Gary, your videos keep just getting better. And now great T-shirts too!

Thank you Gary , your videos have helped me out so much.

Very informative. Thank you for your video!

Excellent video, I plan to make additions with this in mind

First time I see one of your videos. Congratulations for such a clear and great video. I subscribed right away!

Good to see someone 'focus' in on the issues

Learned some new things about solar energy. Thanks!

This is a great video. You explain things so well, and the graphics are excellent. Thank you so much.

Very interesting , good for you .More people will take up solar when they see simplistic explanations of the solar power available . I installed 28x 400w panels at latitude angle with 2x 6000ES + inverters and 3x 9.6kw Li batteries . The result is an abundance of power on a daily basis . The system has been running for 20 months now and I am always looking for more appliances too use up the surplus. 1 inverter had a charging failure which meant that the 2nd inverter had to handle all the charging and loads . It coped well with this , thus qualifying your ( and my ) theory on over panelling . Panels have never been cheaper I encourage those looking into a PV system to add more panels than the energy audit suggests .

THANKS FOR THE WONDERFUL AND SIMPLIFIED EXPRESSION. SO INFORMATIVE AND EDUCATIVE FOR A NON ENGINEER LIKE ME.

Thanks Gary, I must admit I thought i knew what you were going to say and I got some of it right, but you made many more points than I expected.. Excellent video content and delivery.

Very informative, thank you.

Very good video, thank you

Hi Gary, OK I understand. Thanks for your reply. Regards Mark

Thanks for this Gary. I am now going to check if I can fit extra panels as in their current configuration I am maxed out.

Fantastic explanation 👏👏👏👏👏

Absolutely agree, oversize your array, but don’t undersize your inverter. Once you have solar you’ll find places to send any excess generation, be it to the grid, batteries, hot water, aircon or car. I doubt that most households would be able to produce more energy than they could consume The great thing about the whole electric ecosystem (at the moment in UK) is the export rate of 15p vs 7.5p import, meaning the right setup could give you zero bills by producing 55% (including losses) of your annual usage

Thank you for the video

Excellent video.

thanks this was well explained !

Good info thanks

Another super interesting informative video Gary. I oversized my array, 9.6kW on a 7kW inverter and 9.4kW battery split across two roofs. So makes alot of sense to maximise generation from the roof space we have without a bigger inverter

Fantastic video!

Great video again! I am seriously started thinking I should really replace my 450w panels to 550w.

Excellent; had to sub.

just brilliant info guv'

very informative

A very good video again Gary. I have a SSE facing rear of house (semi detached) and have maxed out roof space. I asked installer about wall mounted panels and front of house NNW facing and they advised against the latter and didn't do the former. As I understand it north-facing panels are not bothered with because they only produce 50% of south facing panels. This ruled them out ten years ago but now that panels are considerably cheaper and more productive should we be taking a look at this option?

I had a lot of problems when getting quotes with " one size fits all" installers who didn't wan to install mix of orientations or different orientations on different roofs and who basically said "Local Network won't agree feed in over 3.6kW ever so you get a 3.6kW inverter ( irrespective of the fact Feed-in power can be set to the right limit ) and 4kW max panels, when I was looking to put 6kW over 3 roofs E S and W to spread the generation period as much as possible. Needless to say none of those numpties ( often sales people with a working knowledge of google earth and not much more ) got the job.

well said, brother... I'm kinda new at this solar thing, and I had a hunch that getting the max output of power was literally - a moving target. On "paper" it's a static number, but in real-life, there are many variables and most of them are in constant movement. Kinda like going duck hunting with a bee-bee gun and not a shot gun. Greg (garden grove, CA)

Interesting video. Had solar for 13 years now great investment. One thing you didn’t mention the other big killer is temperature. Cold sunny day in December can giver way more peak than you would expect where as peak output an a 33 deg day can be disappointing. Last year on the 40 deg days power was way down.

Absolutely correct, even with microinverters. The peak is clipped but area under the curve is still larger. The objection of course is the higher initial cost but ROI could be quicker.

Thanks thinking about making the jump your videos are very informative, can I ask what does this mean for a enphase your system with microinveterrs and AC system + battery

UK NW England. Install on SE facing roof. System: 6.2KWp + 5KW inverter + 13KWh battery. Had to hand £600 to DNO for sign off, but otherwise happy. We generate 6MWh/year. Good analysis. More winter power when you really need it. In summer too much power to use.

Gary, Thank you for another fine video. Two years ago I increased my system from 12 kW to 15 kW in anticipation of my purchase of an EV. I did this on the recommendation of my excellent solar contractor/electrician. Since my SolarEdge inverter is 10 kW I’ve been wondering if the oversizing contributed to the premature failure of the inverter. You read my mind and put that concern to rest.

In my country you only get the government grant if you export less than 20% of the energy produced. Over-sizing can get you in trouble. Since I stop working from home and bought more efficient appliances I'm finding harder to consume all that electricity, by this summer I guess I'll have the car plug in everyday to use that 80%

Hi Gary, Thanks, that's very informative. Re the inverter efficiency @5:00, are there figures for this? Also, AIUI inverters with different AC output ratings may have the same internal DC capability. I'm thinking of the GivEnergy Hybrids where 3.6 and 5kW inverters both have the same 7.5KW DC capability, so they can simultaneously export 3.6kW AC and charge a DC battery. Presumably the efficiency of these would be identical?

This is a great video and extremely informative well scripted, videography was great and the information was accurate and well spoken to the targeted audience. Also it highlights some of the issues I have with solar power being pushed so hard. Firstly I think that solar is a wonderful thing there is no argument there at all, none, however storage is less than optimal and expensive. Then the very folks (read the government) that push the solar alternative charge you exorbitant fees to add solar above some prescribed rating to your home. Then the insult to that injury is that the folks that push the solar (read the government) on you regulate the amount of income you can receive from the power company for excess electricity that you, using the equipment bought, paid for and installed by you, kindly sell back to the grid for your neighbors usage. If you step back and take a zoomed out view, instead of the myopic view of solar is so great and I am doing something great for the planet, then you can see that something is just not right at all with the "solar plan" the government makes, if it is needed so badly why charge crazy fees for the licensing above a certain size, the licensing for the installation, the taxes on the equipment and taxs and fees for the re-selling back to the grid? And yes I understand the need for electrical qualified electrical installations that are inspected by those very folks. (read the government) (humor here). Where I live there are no restrictions for solar you can add as much as your wallet allows, but I used 390 kwh of electricity last month so my 50 dollar electric bill does not make me want to install $10k worth of solar panels, inverter, solar battery managers and batteries to drop the grid. The perfect solution was fielded by Musk at one time, electrical co-ops, where you and nine other neighbors (10 being an arbitrary number) were the entire 'grid' for yourselves. 10 homes with this oversized solar like in the video, a centralized 10 Powerwall system and 10 inverters, one in each home. No power back the real grid, and everyone shares the benefits and the costs.

Hi Gary. Thanks for the great info. Can you please list the inverter size of tesla PW3 and PW2? If I am installing 9.72KW of solar array which Powerwall is a better fit? Thank you so much for your time!

Another great video Gary, thanks. My array is 6.8kWp on a 5kVA (4.4kW) inverter (55% oversized) and tbh I would have installed more PV capacity if I could have fitted it on my roof. It's a DC coupled Victron system with 14.4kWh of Pylontech batteries so I can avoid clipping most of the time. I'm also based in central Scotland and although my roof is facing 184 degrees, the pitch is just 14 degrees so it's unlikely I would see 6.8kW from the array even in summer. So far I've seen 6.3kW max in mid July so I hope to see a bit more than that in late May or early June but I doubt I'll see 6.8kW. In fact my Victron MPPT charge controllers are 250/60 units (2 of them) and although they are spec'd at 3440w each, with my charge voltage of 53.2V, my theoretical max would be something like 6384w total (53.2*60*2). I am considering adding an AC coupled non-hybrid inverter with four or five 435w panels mounted vertically to my south facing garage wall as a "winter array" to boost my generation. This would be a more cost effective way to add some extra capacity for the winter months than adding another MPPT and having to run DC cabling all the way back to my inverter and battery location. I could just hook it up to the garage consumer unit instead. I might even add a few extra panels to the east and west gables of the garage and use optimisers to allow them to work with a single inverter. A project for later in the year I think. :)

excellent

Thanks Gary, glad you addressed this. I have two systems a SE 6.4kW and an Outback 7.2kW. My grid provider doesn't give its members net metering, they buy all the electricity we produce at wholesale and sell us energy at retail. They also have a max that you can sell them at 15kW. What I've done is put in 17k of PV and even though I only can sell them 13.6kW. On over cast days I make enough to charge my batteries and on sunny days my curve production curve is flatter. Because PV is so cheap now it pays to do this and also enables me to run with a smaller battery bank, which in my case is 15kWh.

Perfect - we do exactly the same on a DC coupled system mainly for winter shortfall (adjustable array), just be a bit careful as summer yields even inthe the UK, can be 10x what you expect, so stuff can get very hot quickly - we may do a G99 as currently just do off-grid - but even with OE at 15p/Kwh export (upto £1k / pa????), i'm not sure that its worthwhile? - having said all this I'm just configuring my system for VE Dynamic ESS (and G99 approval) for possible use with OE

Hi Gary, fantastic video. I have solar panels and battery. I live in Scotland, can I try wind energy? Which one do you suggest?

Thank you very much, Gary. Your videos are the best classes on KZfaq on this subject. I would like to take this opportunity to send a question: Do you think that adjusting the tilt of the panels, to maximize winter production, could be a good strategy to minimize clipping on an inverter overloaded by 150%? Would this strategy bring more overall efficiency? I haven't been able to find studies on this strategy yet...

Interesting video! Im planning to buy an Deye 12kw inverter, the price difference wasn't that high but i actually only need an 8kw one. Is the efficiency a big problem here? I have 5.6kwp at west and east orientation (makes for theoratical max 8kw peak). The deye handles a max of 15kw solar input.

Thanks for the info, I just subscribed. Where we are in July and August we can get up to 50 Celsius. Does this damage the panels in any way?

😊 This is the 1st video of yours I've seen. Very interesting. I'd like to learn what ever difference there woukd be if not a house. But a flat roof recreational vehicle. In the US, there isn't a rule saying you can't take a solar array to the edges of an rv roof. But, for the most part, they are going to be parallel to the ground. Don't think there is any restrictions on sizing an inverter on an rv either.

Hi Gary. Hopefully fitting my new solis hybrid inverter and batteries on Friday. My final array will mostly be East and West orientation but after my extension is built i will have the opportunity to add 2 more panels facing South.. if i add the 2 South facing panels to my east facing panels at the end of the string and just before the inverter, will it create shading to the East facing panels or is it ok because its the last 2 panels before the inverter !! Regards Mark

Yeah, i dont have real proove of that too but i keep wonder how much that differs, maybe in days with terrible wetter when a invertor keep switching on and off

I've oversized my system and designed it around winter. I've got 3 x more panels than my charge controllers can process. I've designed it for dark and cloudy days. So high voltage strings in parallel, to get the most from Mppt. I built a ground array facing south. I live offgrid in Sweden. I've got my panels aimed for the winter sun. Also, the steep angle helps keep snow off, but after every snow fall I still need to go out and scrape off snow. That saying, in the sommer my batteries are usually full by the time I get up in the morning. I'm not worried about the bad solar panel sommer angle as I have such long daylight hours. Also in sommer I turn off most of my strings. I run 12V for everything, but have a 3kW inverter I can put on when I need, mostly for the washing machine, (always run with only cold water and 40min cycle) It works for me.

Shot in the dark, Have you ever looked into wind and solar as an option? I've just had solar installed to provide energy to our property and I'm just starting to experiment with a small turbine to provide power to my workshop albeit just lighting for now.

I've a 6kw Solis inverter and 18 PV 370 watt Panels, is that over sized,had 14 Panels last year,but had the extra ones fitted this month, seams to be a improvement in generation on the odd days we've had a bit of Sun 🌞

Greetings. Congrats for the video. I didn't know the benefits of oversizing. I was amazed. I have a growatt spf 6000 es plus. Now I have 12 sunket stk410M10 panels in series for One MPPT. If I don't bother you, can you tell me how many panels I can install at most? I'm sorry for the bad English. Google. Translator Greetings from Italy

Thank you for your valuable video. Would you see similar benefits of oversizing array using ENPHASE micro inverters? Perhaps one of your others videos is about that? Regards

I added panels to my house to get east & west generation but used a micro inverter on each panel.

Great info Gary, but you are missing one key variable; what I like to call “spousal unpredictably quotient”, which led me to installing an inverter and battery combination that can output 10kW with a 3kW array to deal with the unpredictable nature of our consumption curve.

Thanks for the video, i was looking into solar as an option 8kwp with a 6kw inverter and a battery bank, most likely ac coupled to allow for expansion. Though now i have been trying to research microinverters supplying AC straight from the panels - from my understanding this would mean the G99 set as the kwp, with the bonus of no clipping along. Aside from the initial cost would there be any other downfalls? Or has anyone got any real life feedback on microinverters?

Agree this is also my experience from my oversized system since 10 years. No problems so far but we live in a cold climate Sweden .

Hi Gary,thanks great video.Can you maybe enlighten me,what is the solar maximum size on a 5kw inverter,as i understand the voltage is the biggest issue.Will apreciatre your input.Im from South Africa

Agree with all the point you make Gary, except for the one about dirty panels reducing power output. My own personal experience, I’ve had a 4kW FIT array since 2016. Every year annual generation has been around 3mW, some years more, some years less. I’ve seen no obvious degradation due to dirty panels (or panel ageing); the panels had never been cleaned until last January when we had scaffolding up to install our new 10kW array. There was a bit of lichen in a couple of spots but the panels were pretty clean considering. I’ve read that they do generally keep themselves clean with rain and wind, and that’s been my experience. Of course if you’re heavily overshadowed by trees or birds dropping on the panels then yes a potential issue, but then you’ve got other shading problems as well

I have a Victron inverter and charge controllers, what I did was lower the percentage on the charge controllers (by software) to keep from getting too close to the maximum input for solar!

Completely compelling truths. Thanks Gary

Gary, what is your recommendation for people considering adding to their existing array when they are receiving FIT payments? My understanding is that they could potentially lose their payments because their system has been changed from the original and when submitting quarterly generation meter readings they make a declaration that the system has not been changed. Is it to use either a second inverter or micro inverters with the extra panels and connect directly into the distribution panel without going through the generation meter? Thanks

Hello Gary, I'm having trouble finding an inverter in the 15-20KW range that supports Low Voltage batteries. When you're in this range are all inverters designed for High Voltage batteries?

Hi first time watching your videos and found this very interesting.. I currently have 3kw of panels facing east and a 3kw inverter. When I can afford it I am going to get another 3kw of panels facing west. I also have several 2.4 pylontech batteries that I plan to add before summer. I have a 4kw Solax hybrid inverter and thought I would need to buy a bigger inverter (6kw).. sooo, can I actually use safely my 4kw hybrid inverter with 6kw of panels and several 2.4 pylontech batteries !! Regards Mark

(Newbie) Doesn't it mainly restrict you to the OCV limitations of your inverter? Is not the smaller the wattage of an inverter have smaller OCV limits?

Thanks for your video Gary; very informative. Pardon me but I am a total noob who has just had his first Sunsynk 8kw installed at his home. I heard the installers speak about the voltage limit on the inbuilt dual MPPTs as something that will limit the size of our array to around 8,4kw. The MPPT are apparently limited to 450v and the array cannot exceed that per string. Can you be kind enough to comment on that?

5:50 east west is nice as most inverters are dual mppt input so each side,note there is now g99 fast track if under 7.6kw ish (32amps) usually approval time is much shorter (The general issue is a lot of solar installers won’t do it because they just wanna make quick money)

I have a question with regard to your example. If after the sun goes down one ends up using 9kWh due to cooking, ac and other passive use, does that mean that you will have to pull 3kWh from the grid

Hi Gary, I'm a Gary too. We're building a house shortly. Unfortunately being on a lake, view is determining position of the home over Solar. That said, we're optimizing the roof for Solar as much as possible. The home is L shaped, presenting both an east west and north south gables. Was considering changing the North South Gable to a Shed roof. The Gables are going to be 8/12 pitch this puts the panels at a favorable angle for our location. Spokane WA, the shed roof, to be ascetically pleasing, would need to be about 4/12 pitch. Much to flat, especially for winter months in our area for Solar panels. Do you think it would be better to have the flatter roof with twice the panels. Or a steeper roof with half the panels? We are also not allowing plumbers and HVAC folks to put the vents anywhere they want. The roof is to stay clear for Solar ! As we will be on one for one, Net Metering and with the lower cost of Panels these days. I plan to Carpet bomb the house with as many panels as it can hold. We will have all winter to use any extra power, as the Net Metering does not reset till March. Which is early Spring in our location. Would love to hear your deep dive into this and the ins and outs of maintaining Solar panels on steep roofs. 8/12 is not easy to maneuver for cleaning panels but steeper may lend itself to keeping pine needles and leaves off. Look forward to your 2 cents!

If your energy consumption is around 5kW in general and you therefore decide to install a 5kWp array, the maximum you can generate is 5kW(approx) and that will only happen in optimal conditions, ie it will cover your demand only occasionally. So oversizing your array means you can generate 5 kW for much more of the time and cover more of your demand. But other factors like load shifting and tariffs mean you need to do the maths to find the optimal solution, rather than just piling on more modules.

Timely. I'm in the process of getting a 5Kw inverter with 9kW panels. However the panels are in two locations and one set will be from partially to mostly shaded (there will be optimisers) from maybe 1pm onwards, so that only for a few hours in summer will i get the full 9KW (If ever as maybe I won't get the max before the shading on the "shaded" section starts) Also as I'm in the UK this depends on DNO approval as (as you explain) a G99 has to be applied for. One other benefit of oversizing is that rather than getting a set of panels in one location and then later deciding you'd like more, it's cheaper to install in one go, essentially I'm only really paying for the extra panels as they will be on a garage roof and don't require an extra full set of scaffolding etc and it should be easy (for them) to add these on the same visit. Fingers crossed for me re the G99 it went in yesterday !

Thanks for this informative video. I'm under the impression that a larger inverter can recharge DC batteries from the grid quicker and this is becoming more beneficial as people are installing larger battery banks on their homes. Any thoughts about this aspect?

I think this makes sense from a purely more energy collection perspective but not from an ROI perspective, as any wasted potential energy is an increase in the ROI time for money you paid and energy that could have been collected but wasn't. Unless the savings from a smaller inverter cancel out the cost of the extra panels which I don't think is the case.

Considering how cheap solar panels are getting, it makes more sense to oversize your system if you have the space to accommodate it, it will help to generate more energy in the winter months when you're likely to generate less, it will mean you will likely generate more then you need in summer months, but who cares, you want to try and generate as much as you can in the winter months, and if you are grid connected, you can sell the excess energy to the grid or store it in batteries. Solar panels are so cheap now, especially in Europe, that oversizing makes a lot more sense

Hi Gary! Nice and very useful video! You earned a subscriber here! Could you please be so kind as to tell me if a system with a 5 kW inverter and 6 kW panels would be OK? Or maybe a 6 kW inverter + 8 kW panels... Honestly, I don't know. All I can tell you for sure is that the energy requirement for my house is approximately plus/minus 6000 kW per year. Thank you very much in advance for your answer.

If you have east west configuration how to you prevent power flowing into the shaded panels when diodes are very wasteful?

Hi Gary We are allowed to export 3.68 kw. Is this per hour or per day? Also what happens in the summer say when you are generating excess electricity - batteries are full and you are restricted on the amount you can export to the grid. Thanks Mike

We have 6.4kWp panels feeding a 5kW Solar Edge inverter with Tesla Powerwall 2. The inverter frequently clips during summer, and every time I look at that flat-topped curve I can't help but wish we had gone for a 6kW inverter. It would have cost little more and given us more energy.

From experience, solar panels rarely produce their rated output due to cloudiness, time of year, etc. But at some time in the year, oversized arrays may produce their rated output which may fry your equipment. You can oversize your array and use a current switch/relay to either turn off a segment of panels or redirect a segment's output to another load. Current switches are adjustable electronic sensors/switch that control low amperages which are used to control the coils of High Amp relays. Neither are very expensive, and both are easy to wire up.

Hi Gary. Firstly im a huge fan. On the basis of your 'which battery size' video last year we invested in a myenergy libbi (not cheap) and have so far really enjoyed its benefits so thank you for that. Wouldn’t have done it without your help! :) my query (and i really hope you might be able to help as i can't find anything relating to our issue online anywhere) is back in 2013 we got a 4kwh east west solar array with a goodwe 3.6kwh inverter. For as long as i can remember we get some days where the generation starts to climb and all of a sudden it flattens. I know that inverters "clip" but the flattening happens between 0.2 and 0.5kwh. Am i right in thinking the clipping should happen only when it exceeds the inverter capacity? The levels are so frustrating and so low its pretty much useless for our needs (today for example was a good sunny day but it went from 1.7kwh to clipping at 1200 and locked in at around 0.6kwh for the rest of the day, not enough to help with house needs and try and charge the battery a little. Ive asked suppliers for their advice and goodwe (inverter manufacturer) and nobody seems to be able to explain it or are willing to help us resolve it. Have you heard of this issue? My thought is we need a new inverter but theyre not cheap and i dont know which would be the best inverter make to go with (its hard to know who to trust) or if a new inverter would solve the issue. I wish i knew of a way to troubleshoot it. Plus we're also on the UK feed-in-tarrif so would a change in inverter affect that? Oh and battery is AC coupled fyi. Sorry for the long question but this is my one shot in the dark to ask someone who i do trust for their advice. Im guessing you're a busy man so understand if you dont reply. Was cathartic to write it down either way :) thanks again for all the great videos. I will continue to look forward to you posting new ones... Daniel :)

My 8 420 w panels have a theatrical max of 3.36kw, i have seen 3.5kw, but on hot days of 30 deg plus i only see 2.6 kw, had i known this i would have squeezed in another 2 panels!

Is it the same for hybrid inverter

It would be nice to do this with the fact that these are larger strings. So your inverter won’t have enough Mppts, become over powered, or the likelyhood of drop off increase drastically with panel damage.

This might sound like I'm living but I'm not. My set up is a 7.2kw solar array with a 5kwh hybrid inverter and 9.5kwh battery. I get 36% more than my colleague at work who had the exact same system except 6.1kw solar array. In june I got 1000kwh she got just over 600!