Sunsynk (DEYE) Hybrid Inverters

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

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 🤔

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.

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

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

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

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 😂

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

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

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

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.

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

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.

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?

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

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

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 😁

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 😁

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

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 😁

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

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

Thanks