Sunsynk (DEYE) Hybrid Inverters

the_amazing_raisin

Something that is confusing me is the question of export limiting with a larger inverter

A lot of hybrid inverters seem to have to ability to restrict export, even not allow export at all

So in theory, you should be able to install an inverter over the 6kVA limitation and still be on an NC6 if the export limiting in enabled

However ESBN seem to have their heads buried in the sand as usual on this and don't have anywhere on the NC6 form to note an export limitation is in place and simply tie it to the inverter capacity

unkel

Nobody can see how much you export until you have a smart meter anyway.

the_amazing_raisin

Well I meant more about not having to lie on the NC6 form 😁

Tbh, I'm not sure they can even see how much power you're exporting. I don't think the smart meter records instantaneous power.

I'm sure they could figure it out from the amount of kWh you've exported in a given time, but you'd literally need to be maxed out for a long time to make it really obvious

I see the NC7 has provision for export limiting, I wonder can it be applied to NC6 as well 🤔

Punchin A Keyboard

@the_amazing_raisin is that 6kVA or 6kw limitation on the nc6.

Punchin A Keyboard

Ok i am confused, i see on the form both 6kVA and 25A. A bit of difference when I use the intertubes to convert those figures to kw.

the_amazing_raisin

https://www.boards.ie/discussion/comment/119857818#Comment_119857818

So ESB talk about kVA not kW, but for the purposes of solar PV there's a 1:1 relationship AFAIK

VA is the combination of real and reactive power and only really applies where you have inductive or capacitive loads (big electric motor)

That's all I know on the topic, I barely scraped a pass in Electromechanical systems in college and I'm pretty sure the lecturer was being generous 😅

the_amazing_raisin

https://www.boards.ie/discussion/comment/119857834#Comment_119857834

240V * 25A = 6,000VA, or 6,000W in DC world

unkel

With 2 others we had sourced 3 SunSynk 8.8kW hybrid inverters and paid for it in full, promised they'd be arriving in the next few days, only to get a phone call that they were all gone from their supplier who had overpromised them 😫

the_amazing_raisin

Disaster, was it an Irish supplier? Maybe an EU seller would be able to get stock easier?

unkel

Not a supplier in this country, no. Nobody here wants to sell us one. They all seem to think the specs aren't allowed because it is over 6kW. They really should keep up to speed 🙄

So if anyone here can find us some actually in stock anywhere (here, in the UK, elsewhere in the EU), much obliged if they could let me know.

con747

https://www.boards.ie/discussion/comment/119858701#Comment_119858701

Is the Deye 8kw any use? You might pick one of them up in France off SunXcell.

graememk

Link for lazy :

https://www.sunxcell.com/onduleur-hybride-deye-8-12kw/

the_amazing_raisin

Yeah I'm getting the same story when asking for a more powerful inverter

I can see why a lot of installers are reluctant to go above 6kW, you're basically into NC7 territory which requires a fee to ESBN and is more work. So they aren't bothered

It annoys me a lot though when they're giving out false information like telling people 6kW is the max allowed.

I had one guy telling me yesterday that there's no point in having a battery because I'd be paid for export, I pointed out to him I'd get deemed export because I was on a night meter, so I could export nothing and still get paid

He then said I must have a smart meter and I repeated myself and he was like "oh yeah, they'll estimate your export then"

I managed to keep a straight face somehow 😂

unkel

Filled in the webform for the Deye in France, will let you know if they ship to Ireland

SD_DRACULA

https://www.boards.ie/discussion/comment/119859307#Comment_119859307

Ask for the ECCO version, that one in the link above is the massive 700mm one.

JHet

@unkel Did you try Edmundsons Electrical in belfast?

jspuds

Tigo have announced new Hybrid inverters not sure of availability over here, have multiple MPPTs 3 on the 7.6 kW and 4 on the 11.4 kW model

https://www.tigoenergy.com/product/ei-inverter

https://www.youtube.com/watch?v=yXmm79AIyK4&t=1s

SD_DRACULA

https://www.boards.ie/discussion/comment/119860404#Comment_119860404

Quite useless if locked down to their own batteries:

And seems like 5000w is also the battery limit so again pointless on a 7.6kw inverter

https://www.boards.ie/discussion/comment/119860124#Comment_119860124

They can't get them either.

irishchris

Anyone manage to source one of the bigger versions of these?

Picked up the sunsynk 5kw ECCO version for family member and will be finishing installing it tomorrow but would be interested in bigger one for myself

These guys managed it.

https://youtu.be/Qbx7i2gYUAc

unkel

https://www.boards.ie/discussion/comment/119887424#Comment_119887424

3 phase though. Most wholesalers here can do 3 phase powerful inverters but nobody seems to want to sell single phase inverters over 6kW.

We're still working on it, but personally I don't want to wait any longer and might go - for now - for a 5kW. It can still do 120A charging / discharging which is double what a 6kW Solis hybrid can do and not too shabby

con747

https://www.boards.ie/discussion/comment/119887710#Comment_119887710

Anything here of use? https://www.europe-solarstore.com/

unkel

Picked up a couple of Sunsynk 5.5kW hybrids for now, they will tie us over until we find the big 8.8kW ones. Which was unlikely to happen anytime soon.

SD_DRACULA

https://www.boards.ie/discussion/comment/119890283#Comment_119890283

Do a post on the install, curious to see if it's a plug and play swap from the Solis or does it need anything extra.

unkel

Will be installed in a different location, with different cable (going 10mm), so it's like a new install. But it's an install like any other hybrid inverter, AC 3 cable, DC 2 cable, comms and CTs and plug in your strings

SD_DRACULA

https://www.boards.ie/discussion/comment/119890637#Comment_119890637

That's fair enough, thought it was a direct swap.

unkel

https://www.boards.ie/discussion/comment/119890754#Comment_119890754

That was the plan alright, you remember right! Plan has changed though, battery indoors will save me several kWh of heating per day on a cold day in winter, be more secure, perfectly safe as it's LiFePO4 and no worries about charging at too low a temp on a cold day. On top of that, the bluetooth signal in my active balancer doesn't reach my work desk the way it is now, this is not handy, I'd like to know the voltage at any time - from my desk - to gauge the SOC. Also expanding to 30kWh soon, would struggle to fit that into my current outdoor cabinet.

irishchris

https://www.boards.ie/discussion/comment/119890346#Comment_119890346

Just switched a family members Solis hybrid it for the sunsynk 5.5 kw hybrid. Easy enough change. Could do with more room within the sunsynk as fiddly with cables but other than that no complaints. All connections are done internally not connectors like on outside of solis. The AC backup is labelled load which is probably not the best choice of wording for it but that is just me being picky.

In terms of inverter it is cracking little workhorse and touchscreen gives plenty detail on it. App is nicely laid out also. Charging at 120 amps continuous last night to the 17.5 pylontech and did it no problem. He is on day night meter though so will drop the charge rate down going forward so as to spread the heat in the shed through the cold nights but wanted to test the continuous charge and did it without any problems.

Will be looking to sell my 6kw Solis hybrid and replace with a sunsynk 5kw as am on smart meter and have only three hour window for charging the 20kw battery. Will put it up next few days on adverts and here for anyone interested as is only 10 months old.

Be interested to hear how you get on @unkel with the seplos and diy battery with it. Can't see there being an issue as recognises through canbus most batteries bms by looks of it. Be good to hear when you have yours set up though 👍

https://www.boards.ie/discussion/comment/119894090#Comment_119894090

Sounds like you had a good result. That wording on load is definitely confusing, what they mean by that is it's for essential loads in split consumer unit.

Can you check what the inverter temp is when charging at 120 amps for me?

@irishchris

Forgot to add @irishchris we want pics

graememk

The sofar also lists the backup supply as load, must be a china thing.

irishchris

https://www.boards.ie/discussion/comment/119894145#Comment_119894145

Should have took snaps yesterday when was fitting it. Will grab some during the week when back and put few up. The main thing I was surprised with was it's size. Probably bit smaller than the Solis hybrid as thought was recieving the original sunsynk model which looks massive in the videos on YouTube but thankfully it was the ECCO version and is a tidy little unit

irishchris

The other thing about the sunsynk that I forgot to mention is the CT clamp which is wired straight into the inverter. House is about 30 metres from the solar shed and extended it with two twisted pairs from a cat 6 cable. They advise 15m max but absolutely no problems and CT readings on inverter match up with actual usage

SD_DRACULA

https://www.boards.ie/discussion/comment/119894346#Comment_119894346

Yeah I was speaking to sunsynk and they said the same thing about the 15 meters for the CT but they said they can send you something if your run is longer as well.

The only downside about the sunsynks is that you can put less panels on the strings because their voltages don't go as high.

Massive pain to go on the roof and lift all the panels to re-arrange the cabling and wouldn't do it for a measly 20a (50a) in charge rates, for 200a it's worth it 🤣

unkel

https://www.boards.ie/discussion/comment/119894090#Comment_119894090

Snap! Got mine installed today too and exactly the same feelings / observations as yourself. I got rid of the Seplos, so setup the battery as AGM. All working fine, just trying to get my head around some of the settings. I do use an active balancer and this combo is all I need until I decide I want to do more automation

Also just used the grid CT clamp from the ME3000SP, we were getting tired (the CTs are an utter pain to get to and replace or remove in the tiny old consumer unit) and hoped for the best, cut it off mid run and just extended it with CAT5 and wired it into the Sunsynk (instead of using the CT that came with the Sunsynk). Was fine, both must be generic enough CTs

graememk

https://www.boards.ie/discussion/comment/119895364#Comment_119895364

As long as it tally's with the myenergi, you'll be good to go.

unkel

https://www.boards.ie/discussion/comment/119895692#Comment_119895692

It doesn't, we probably re-connected a pair of clamp wires into the harvi the wrong way around. Job for tomorrow, we were finishing up outside today in the dark in the p!ssing freezing rain at around 5PM, enough is enough 😁

irishchris

https://www.boards.ie/discussion/comment/119894659#Comment_119894659

Not an issue with the install I did today as only 8 panels on each string bit mine will have 12 on one of the two strings which seems to have reached a max of 460v in the last 12 months so should be ok.

In terms of the charging though it is nearly double compared to the 6 kw Solis. After 15 mins the Solis drops to 68amps whereas the sunsynk does a sustained 120 amps continuous.

SD_DRACULA

https://www.boards.ie/discussion/comment/119895904#Comment_119895904

Not according to sunsynk it won't be, I have 12 panels per string which hovers around 400-420v and they told me to put max 10 on a string, not sure why, well within limits by my count but let me know how that goes 😁

unkel

https://www.boards.ie/discussion/comment/119895986#Comment_119895986

Depends of course on the panels. You or Sunsynk can mention a ballpark number of 10 or 12, but both are meaningless without doing the simple calculation of number of panels * VoC. Should be smaller than max MPPT voltage although in practice you never come close.

irishchris

https://www.boards.ie/discussion/comment/119895986#Comment_119895986

As @unkel says you would need to check your voc on your panels and work it out for your own particular install. Done mine and thankfully well within spec. Also used historical data over entire year to ensure it never got close.

Having a max mppt voltage means you can go to that voltage otherwise it wouldn't be stated as max 😁

SD_DRACULA

https://www.boards.ie/discussion/comment/119895991#Comment_119895991

Exactly, voc doesn't reflect real numbers, 12 * 40v is 480 and panels are hovering around the 400 mark which is well within the 450v limit that sunsynk said you should aim for. I sent them the panel spec sheet and they said 10. They also said the ideal voltage is around 300v

I don't see why this string is not well within the sunsynk limits to be honest (might be a bad example as this string is 100% shaded until next year)

I wonder if the random spikes can cause the inverter to shutdown production and that can be the issue.

Easy fix as the 8kw has 4 strings on it and can easily split 24 panels into 6 per string.

unkel

Be careful with real or historical data. You could in theory reach VoC if it is really cold and sunny (like in -10C), I would just stay within number of panels * VoC <= max voltage per input string

Or at least not go over it by more than a tiny bit

irishchris

https://www.boards.ie/discussion/comment/119896744#Comment_119896744

Cheers, yep will be just below with one string and well below on the other in terms of voc. Just used historical data from last winter spring etc to check max it went to in order to be doubly sure

unkel

I saw my wife put on the kettle a minute ago, so for the craic I switched on my heatgun on 2kW setting. Nice to see 5.5kW coming from the battery 😁

SD_DRACULA

https://www.boards.ie/discussion/comment/119896827#Comment_119896827

Nice but it should go to about 6.5kw with the 120a right? Have you pushed it to the limit?

unkel

120A draw at the battery * roughly 50V = 6kW or thereabouts minus losses, so I wouldn't expect it to power more than about 5.5kW of house load

In my settings I see 120A max for charging and 115A max for discharging, maybe this is because I've set the battery to lead acid (no BMS)

Also thanks to @allinthehead for helping me with some of the settings, the menu is a bit bewildering! All working very well though, I hooked up two of my PV strings to it today

SD_DRACULA

https://www.boards.ie/discussion/comment/119899023#Comment_119899023

I suppose that makes sense, if it can only output a max of 5500w AC then the discharge is capped at that too.

How many panels/what voltages you have in the strings?

daesal

Hi. Interesting stuff. I'm looking to get Sunsynk too. Is the 450v max per string or total over 4 strings?

Thanks

daesal

And...What size batteries do you have with them? Thanks again