Growatt Inverter Not Auto Starting In Morning

Prepz

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Mar 15, 2022
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Hi friends. I’ve tried searching for an answer to this with no luck.

I’m a complete noob to solar but I’ve managed to install a 3 panel (975w) single phase array to a Growatt 3000 + Lifepo4 48v system.

The issue I’m having is at night of course the the PV is not generating any voltage which is leading to the inverter not picking up the panels but when the sun comes out in the morning the inverter doesn’t automatically start solar input back up without me having to flip the Lifepo4 breaker on/off.

I’m thinking there’s probably a setting on the Growatt I’m likely missing but I’m struggling to find anything.

Can anyone help?

Thanks, fam!
 

Prepz

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Yes I meant off/on. Although I wouldn’t be surprised if it were something I’m doing backwards 😂
 

Prepz

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Unless you are only wanting it for a backup, in a power outage.
Any other suggestions you might have, brother? Still running into the same issue- changed setting #1 to SBU and also SOL (this is an off grid system), but this morning again I woke up sun is shining and inverter says it’s not receiving PV voltage or charge. It’s almost like the battery breaker is tripping when sun goes down because it works fine after I flip the breaker off/on. Thanks again!
 

Prepz

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I should probably note that the temperature here has been dropped to the low 40s at night here so maybe the PV voltage has gotten too high and tripped? I dunno just spitballing.
 

Prepz

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Which brand battery? And we always enjoy a couple of pics to help spot issues.
It’s a lifepower4 48v from Sig Solar. Here are a couple photos. I’m thinking it’s a voltage protection trip but I’m a complete rookie lol. The setup is currently working after I’ve flipped the breaker off/on but in the morning it all looks the same except that the PV input is not present and the charge indicator light is off.

Also, my three 325w (series) panels are just leaning on the side of my house and suffer from a couple shaded spots as I’m just playing around with this stuff before I take the roof leap. Thanks!
 

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Prepz

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I think I might be onto the problem. One of my panels in the array even at this time of day and sunshine has too much shade and isn’t producing enough voltage to kick the charge back on. I’m getting voltage drops down to 55v PV input! Thanks for the help guys. I think I need to correct this issue first.
 

Prepz

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Mar 15, 2022
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I think I might be onto the problem. One of my panels in the array even at this time of day and sunshine has too much shade and isn’t producing enough voltage to kick the charge back on. I’m getting voltage drops down to 55v PV input! Thanks for the help guys. I think I need to correct this issue first.
Hi guys. Update on no PV input detection after sunrise. I waited all day for full sun to see if any shade was the reason the inverter battery charge and PV input were not restarting when the sun comes out but I’m still running into the same issue. At night, the battery charge indicator light goes off (which I’m assuming the breaker is tripping due to no voltage being detected and everything works fine when I reset the battery breaker off/on).

Still looking for any other leads or ideas anyone can muster up.

Maybe there’s a Growatt setting I need to change that either bypasses the trip or makes it easier to sense PV input to start back up automatically?

I’ve tested the PV input when full sun and getting 110v

Thanks again guys
 
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