Adding a battery to a SUN 1000W GTIL

pops106

Solar Enthusiast
not possible - as there's only 1 input to the units, its on or off.
In the diagram in post 1 the battery & solar is connected together, the inverter doesnt know if its battery power or solar power its seeing.

I tried it yesterday, was getting ~1000W from the panel & had a full battery, so set the inverter to output 600W flat.
It was using the solar/charge controller only & didnt draw from the battery, once the sun went down - more & more came from the battery.

Yea mine does exactly that, I find as long as the solar is around 200~300w higher then the house load the battery is charging, less than that battery stays roughly same voltage until obviously less solar then house the battery discharges.

This is my battery voltage for yesterday.

1631190764199.png

What the solar looked like
1631190908653.png


You can see my fridge kicking in and out all day hence the ups and downs.

The fridge-freezer

1631190983137.png
 

chilly2

New Member
I have exactly what your "intention" is & have been using it for months.
It works exactly how you think it would - it gets power from either the battery or battery + charge controller. I commonly see both batt & SCC providing power in the mornings.

I have 4 x 390w panels, 2S+2P, so 80v and use a Victron 100/50 controller.

Works really well - just wish I went 2000W with 48v initially.

Did you ever upgrade to the 2kw?
 

fafrd

Solar Addict
Do those Deye units have CT clamp sensor capability too?
It does appear to have zero-export capability, either through a seperate power monitor box or through a CT clamp sensor, but:

It appears to only support 240V operation, so it’ll need a modified dual-CT clamp sensor to work with US split-phase 120V power (and no way to prevent export on one leg) and

It has a minimum DC startup voltage of 80V, so unclear whether it can be battery operated at all, but if so it will need a high-voltage battery (80 to 120V).
 

nate_syd

Solar Enthusiast
Do those Deye units have CT clamp sensor capability too?
It does appear to have zero-export capability, either through a seperate power monitor box or through a CT clamp sensor, but:

It appears to only support 240V operation, so it’ll need a modified dual-CT clamp sensor to work with US split-phase 120V power (and no way to prevent export on one leg) and

It has a minimum DC startup voltage of 80V, so unclear whether it can be battery operated at all, but if so it will need a high-voltage battery (80 to 120V).

Yes, the Deye units have really solid functionality/features.
yes they're 230v - i'm based in Australia, for US there's a different brand Solar Ark(?) i think.
 

houseofancients

Solar Addict
no - i've got 2 x 5kw Deye units coming today, so swapping over to big time power.
you,'ll find the software and fubctionallity surprisingly similar ( of course your 5 kw's will have a lot more option)

the GTIL's are figuratively speaking the grandfathers of the deye/sunsynk/sol-arks
 

fafrd

Solar Addict
Yes, the Deye units have really solid functionality/features.
yes they're 230v - i'm based in Australia, for US there's a different brand Solar Ark(?) i think.
Solar Ark unrelated to Solark?

What is the rough price of these GTIL inverters?

[Edit: looks like it is Solark: https://www.solar-electric.com/lib/wind-sun/Sol-Ark-5K-Manual.pdf

120V output and can be operated off of a 48V battery. Nice product but $4500 is too rich for my blood (I paid $250 each for two 1000W (850W when powered by 24V battery) SUN-1000G2 GTIL inverters (one per leg)).
 
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nate_syd

Solar Enthusiast
Solar Ark unrelated to Solark?

What is the rough price of these GTIL inverters?

[Edit: looks like it is Solark: https://www.solar-electric.com/lib/wind-sun/Sol-Ark-5K-Manual.pdf

120V output and can be operated off of a 48V battery. Nice product but $4500 is too rich for my blood (I paid $250 each for two 1000W (850W when powered by 24V battery) SUN-1000G2 GTIL inverters (one per leg)).

Sorry - yes Solark, which I think is the original - Deye is a copy of those.

Dont compare the GTILs to the Deye/Solarks - they are very, very different units - with immensely different capabilities.
The GTILs are a superb little unit & a pair of 2,000W units would do 85% of what i need.
But they dont have approvals (in my country), they dont do UPS, they dont have battery charge capability, they cant sell back excess solar... they're just not configurable at all. I currently get around that by clicking buttons every day & checking monitoring - the Deye/Solark is all automatic.
 

fafrd

Solar Addict
Sorry - yes Solark, which I think is the original - Deye is a copy of those.

Dont compare the GTILs to the Deye/Solarks - they are very, very different units - with immensely different capabilities.
The GTILs are a superb little unit & a pair of 2,000W units would do 85% of what i need.
But they dont have approvals (in my country), they dont do UPS, they dont have battery charge capability, they cant sell back excess solar... they're just not configurable at all. I currently get around that by clicking buttons every day & checking monitoring - the Deye/Solark is all automatic.
Totally understand - if you need all of that capability, an integrated all-in-one is a much better solution.

In my case, I just want to charge a battery off of solar and the discharge to compensate for home load during peak period (3pm to 8pm).

A pair of little SUN GTILs are a good fit for that appplication (using lamp timers or a smart SCC with relay control to control discharge period).

It’s also hard to find Grid Tie Limit inverters that run off of a 24V battery as well as capable of 120V single-phase output.

For simple time-shifting, I’ve been pretty happy with the Sunpower GTILs…
 

nate_syd

Solar Enthusiast
In my case, I just want to charge a battery off of solar and the discharge to compensate for home load during peak period (3pm to 8pm).
A pair of little SUN GTILs are a good fit for that appplication (using lamp timers or a smart SCC with relay control to control discharge period).

It’s also hard to find Grid Tie Limit inverters that run off of a 24V battery as well as capable of 120V single-phase output.
For simple time-shifting, I’ve been pretty happy with the Sunpower GTILs…
100% agree with you, my peak usage is 2-3,000W per phase - so those units would cover it. I have mine paired with a Victron charge controller & everything works well. They are unbeatable value for money & solid performance.

There is a 24v unit that appears to be new (230v though) the SUN3-6KSG04LP1EU-3-6KW - if it was approved I probably would've gotten those instead.
 

fafrd

Solar Addict
100% agree with you, my peak usage is 2-3,000W per phase - so those units would cover it. I have mine paired with a Victron charge controller & everything works well. They are unbeatable value for money & solid performance.

There is a 24v unit that appears to be new (230v though) the SUN3-6KSG04LP1EU-3-6KW - if it was approved I probably would've gotten those instead.
These things make so much sense in these days of TOU peak pricing, but I doubt they are ever going to be ‘approved’ for use here in the US…
 

houseofancients

Solar Addict
Sorry - yes Solark, which I think is the original - Deye is a copy of those.

Dont compare the GTILs to the Deye/Solarks - they are very, very different units - with immensely different capabilities.
The GTILs are a superb little unit & a pair of 2,000W units would do 85% of what i need.
But they dont have approvals (in my country), they dont do UPS, they dont have battery charge capability, they cant sell back excess solar... they're just not configurable at all. I currently get around that by clicking buttons every day & checking monitoring - the Deye/Solark is all automatic.
actually , sol-ark is nothing but a rebadged deye, with an exclusive sale to the us distri agreement

there is another topic describing exactly how the history has been
 

nate_syd

Solar Enthusiast
actually , sol-ark is nothing but a rebadged deye, with an exclusive sale to the us distri agreement

there is another topic describing exactly how the history has been
I thought it was the other way around?
Solark was the original company & Deye used their IP & just started to sell them
 

houseofancients

Solar Addict
I thought it was the other way around?
Solark was the original company & Deye used their IP & just started to sell them
nah, look up the topic..

in short :
a uk guy named keith had a small company that developped the gtil.
company got bought by deye, they brought out gtil2, keith being the developper.
keith was allowed under the deal to have his own exclusive brand called sunsynk for the uk and africa's, deye would do rest of the world.
sol-ark then found them, and did exclusive for the usa, sub branded as sol-ark.
they started falsely marking it as "made in the usa", but got called out when the label said made in china, changed it to "designed n the usa" , which is horse manure.
they do area specific stuff, but this class is still developed by the bloke that started it : keith
 

fafrd

Solar Addict
nah, look up the topic..

in short :
a uk guy named keith had a small company that developped the gtil.
company got bought by deye, they brought out gtil2, keith being the developper.
keith was allowed under the deal to have his own exclusive brand called sunsynk for the uk and africa's, deye would do rest of the world.
sol-ark then found them, and did exclusive for the usa, sub branded as sol-ark.
they started falsely marking it as "made in the usa", but got called out when the label said made in china, changed it to "designed n the usa" , which is horse manure.
they do area specific stuff, but this class is still developed by the bloke that started it : keith
Are these designs by ‘Keith’ in the UK also related to the Sunpower 1000W and 2000W GTIL inverters?

If you’ve got any links to history of this story (or suggested search terms), I’d love to learn more…
 
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