Sunshine22
New Member
- Joined
- Jan 27, 2022
- Messages
- 9
I've been reading this forum regarding the Growatt issue of stopping solar after the battery has reached full charge. I have a couple questions. Below is what I'm using:
SPF 3000TL LVM-ES 3KW
USE2
Bulk 57.5V #19
Float 55V #20
DC Cutoff 46V #21
Batteries - 4 x Zooms 12.8v 200ah LiFePO4 in series
No Utility
4000 watts solar
Priority is set to SOL
I have not connected the inverter to a computer, so my questions and observations are based on the Growatt's display. What program do you guys recommend to monitor the details?
Scenario: The "Charge" light is solid (no charging) and the battery is at 54.8 volts or so with no load. During daylight hours I can run a 300 watt load all day. The display will show the "solar" icon with slightly more watts coming in than going out.
1) Does this mean the load is purely carried by solar?
2) If I hit the inverter with a large load such as a shop vac 1200 - 1500 watts. The inverter "charge" light begins blinking and the fans ramp up. The "solar" will show around 2300 watts with 1200 - 1500 watts going out. Even if the vac is only on a minute or 2 the charging will continue at around 1200 watts for 1/2 hour until it tops up the battery. At that point the "charge" light will stop blinking, and the fans ramp down. Since the solar appears to be pulling in more than enough to power the load, why does the Growatt go into bulk charge? Shouldn't the load have been purely on solar?
3) With no load - after the "charge" light quits blinking the display will still show the solar icon with anywhere from 50 - 100 watts coming in. Is that just to maintain the unit, or is it actually still powering the battery - even though the "charge" light is solid?
4) If the inverter display is showing the "solar" icon with current coming in does that mean that it is indeed using solar, or do I need a computer program to see the details?
If the Growatt's "solar" icon showing connection and current means it is still using solar to power the load, it would appear my unit is not having the problem of cutting off solar after the battery is fully charged. I purchased the unit from Ian in February 2022, so did something change (for the better) recently?
Thank you for your help!
SPF 3000TL LVM-ES 3KW
USE2
Bulk 57.5V #19
Float 55V #20
DC Cutoff 46V #21
Batteries - 4 x Zooms 12.8v 200ah LiFePO4 in series
No Utility
4000 watts solar
Priority is set to SOL
I have not connected the inverter to a computer, so my questions and observations are based on the Growatt's display. What program do you guys recommend to monitor the details?
Scenario: The "Charge" light is solid (no charging) and the battery is at 54.8 volts or so with no load. During daylight hours I can run a 300 watt load all day. The display will show the "solar" icon with slightly more watts coming in than going out.
1) Does this mean the load is purely carried by solar?
2) If I hit the inverter with a large load such as a shop vac 1200 - 1500 watts. The inverter "charge" light begins blinking and the fans ramp up. The "solar" will show around 2300 watts with 1200 - 1500 watts going out. Even if the vac is only on a minute or 2 the charging will continue at around 1200 watts for 1/2 hour until it tops up the battery. At that point the "charge" light will stop blinking, and the fans ramp down. Since the solar appears to be pulling in more than enough to power the load, why does the Growatt go into bulk charge? Shouldn't the load have been purely on solar?
3) With no load - after the "charge" light quits blinking the display will still show the solar icon with anywhere from 50 - 100 watts coming in. Is that just to maintain the unit, or is it actually still powering the battery - even though the "charge" light is solid?
4) If the inverter display is showing the "solar" icon with current coming in does that mean that it is indeed using solar, or do I need a computer program to see the details?
If the Growatt's "solar" icon showing connection and current means it is still using solar to power the load, it would appear my unit is not having the problem of cutting off solar after the battery is fully charged. I purchased the unit from Ian in February 2022, so did something change (for the better) recently?
Thank you for your help!