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Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 2:51 pm
by Moxi
Does anyone know of a micro grid tie inverter that would operate from a single 18v photovoltaic panel?

Moxi

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 3:09 pm
by AGT
260W Grid Tie Micro Inverter DC18-50V to AC230V Solar Pure Sine Wave Inverter CE

Look this up on eBay…

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 3:25 pm
by Moxi
Trouble is when you look at the detail on the spec sheets the start up voltage is usually somewhere around 22 to 26v I’m looking for something that would work off a single 18v dc panel

Moxi

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 3:45 pm
by AGT
Ok then, amazon have one the starts at 10.8 volt.
Same info into Google, comes fitted with Mc4 connectors etc

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 4:17 pm
by ALAN/ALAN D
https://www.amazon.co.uk/1600W-Solar-In ... 38&sr=8-57

It says 10.8 volt input.
It also says power 1600W

But when you read the info on the back plate it says. rated output power 150W

CHOCO TEAPOT comes to mind. :oops:

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 4:53 pm
by AGT
What about using a buck booster converter to increase voltage from panel to above 18volt so more options on the inverters.

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 5:08 pm
by Moxi
Thanks AGT I’m afraid I’m guilty of looking at one of those chines clones and reading starting voltage in the 20v tragicomic and assuming they were all the same.

Not thought about the buck boost idea thanks

Moxi

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 5:08 pm
by Tinbum
This made me laugh see highlighted box.
Image

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 5:22 pm
by nowty
AGT wrote: Sun Oct 02, 2022 4:53 pm What about using a buck booster converter to increase voltage from panel to above 18volt so more options on the inverters.
I tried something like this several years ago, I tried to get a single standard panel to run a grid tie inverter requiring about 100V.

It did work but not very well, I think because the max power point tracker of the GTI was running on the voltage booster and not on the panel. So needs some sort of MPPT in between the panel and the voltage booster.

Re: Low voltage micro grid tie inverters

Posted: Sun Oct 02, 2022 5:26 pm
by Jinx
AGT wrote: Sun Oct 02, 2022 3:09 pm 260W Grid Tie Micro Inverter DC18-50V to AC230V Solar Pure Sine Wave Inverter CE

Look this up on eBay…
Have you used one of these? Looks dodgy as hell but would be very useful if they are safe and reliable?