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SunScreen General Discussion
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SunScreen not directly suited for new version gtil1000
Hello, , after i bought my third gtil1000 i noticed that there are a few modifications, The one that is affecting the sunScreen print is the fact that a few relays are added to switch the mains on and off from the powerstage. These relais are powered of 12 volt, and you guessed it, that 12v is coming via the sunScreen print if you mount that. As a result the lithium battery will be empty before you know it. My workaround is to feed the relay modification with the 12v BEFORE it enters the sunScreen print.
The other modification they applied was the change from transistors to fets to switch the fans, so no need to change transistors. Hope this info helps.
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just a thought
Hello, I am just wondering about the SunScreen print. After the 11 hours downtime, the battery will be empty, and as after that the mains power comes up, the internal 12V powersupply has to feed the circuit AND charge the battery. I wonder if that scenario is taken in account, because the internal 12V powersupply is very tiny and it is forbidden to add extra load ,fans etc, so the question is, can it handle the charge current?
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Ben de Lange
Sep 02, 2024
Thank you for your answer, I for myself keep the chargecurrent (battery side) on 200 ma, just to be sure. I really dont want de inverter to survive an outage and when the power comes back a dip on the 12V powersupply :-)
I did lower the output voltage to 9V as you said,
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hello, the relais are 12V fed, but are controlled by a fet or transistor that is controlled by the pic processor that does the ac stuff.
And for your information, the 2 igbt's and the heatsink are my own modification right out of the box :-)
The igbt's are k40t120 from infinion, i got those from an old ups (1200v 40a)
i also got rid of that peski little fan and i use a giant heatsink mounted on top of this aluminium block. My other 2 gtils have that modification also and get never above 40c.