The Growatt is V 3.0. It was delivered in mid June 2021 from vendor watts24/7.
This morning I decided to try out the power saving mode by setting program 4 to SEN. I need this to work because I have discovered that the inverter requires a 3A charge rate to break even and hold the battery Volts steady. That is somewhere between 75 and 85 Watts! I have a 200Ah bank consisting of 4 x 100Ah AGM in 2s2P and a 410W panel. My Growatt is installed in my tow vehicle and I plug my 30A travel trailer into the Growatt.
Other key settings: 01: SOL, 05: AGM, 14: OSO. There are no 120V input connections for this test.
Test 1. find the cut-in and cut-out Watts.
I tested with two 120V lamps and three incandescent bulbs; 40, 60, 100W. The power saving cut-out at 140 Watts. Cut-in is somewhere between 100 and 140W, therefore, 'pretty low' is under 140W. It works.
Test 2. Run the 11,000BTU roof air in the travel trailer and observe if it cycles on and off correctly.
The A/c runs betwwn 900 and 1050W and has a Micro-Air soft-start. As of this writing, the A/C has cycled 8 times. The dashboard is showing Solar: 277W, Charging: 273W, and Consumption Power: 0W/0VA. The trailer is cooled as expected. It works.
This morning I decided to try out the power saving mode by setting program 4 to SEN. I need this to work because I have discovered that the inverter requires a 3A charge rate to break even and hold the battery Volts steady. That is somewhere between 75 and 85 Watts! I have a 200Ah bank consisting of 4 x 100Ah AGM in 2s2P and a 410W panel. My Growatt is installed in my tow vehicle and I plug my 30A travel trailer into the Growatt.
Other key settings: 01: SOL, 05: AGM, 14: OSO. There are no 120V input connections for this test.
Test 1. find the cut-in and cut-out Watts.
I tested with two 120V lamps and three incandescent bulbs; 40, 60, 100W. The power saving cut-out at 140 Watts. Cut-in is somewhere between 100 and 140W, therefore, 'pretty low' is under 140W. It works.
Test 2. Run the 11,000BTU roof air in the travel trailer and observe if it cycles on and off correctly.
The A/c runs betwwn 900 and 1050W and has a Micro-Air soft-start. As of this writing, the A/C has cycled 8 times. The dashboard is showing Solar: 277W, Charging: 273W, and Consumption Power: 0W/0VA. The trailer is cooled as expected. It works.