haissamx

Yes the voltage of batteries is settling on 50 V. When there is power to charge (from pv or grid), the batteries voltage are getting to the float voltage set. so it seems 50 V is the voltage of batteries in 100% charge state right? the max that I allow the batteries voltage to drop is to 47 V. When it hits this number, I switch to main. Thank you for your reply.

Okay i will try to get these from the information from the battery manufacturer. Meanwhile, can you recommend what are the best settings for the inverter to ensure smooth and efficient performance?

They are connected in series. I will try to find the catalogue of the batteries.

I have 4 batteries (same model) 200 AH 12 v each

Hello, I'm a newbie to renewable energy and solar. I have installed a 2.7 KW 48 v system with 6 panels 450 W each, Growatt SPF 5000 es inverter, and 4 Lead-acid batteries Everything is running smoothly, except that the inverter is discharging the batteries to 50 v after a full charge even without a load. When there is no source for charging even if there is no load, the voltage is being dropped to 50 V. As it seems for the inverter the maximum voltage for the batteries should be 50 v. Below are the settings 1- sub 2- 60 3- APL 4- dls 5- FLD ( I also tried USE) 6- dls 7- dls 8- 230 9- 50 10- 4 11- 40 12- 48 13- 56 14- snu 15- OFF 16- OFF 17- OFF 18- dls 19- 58.4 20- 56 21- 43.6 Any idea why this is happening?

Yes i have a grid connection but not all the time. the electricity in Lebanon is only few hours a day. The values for codes are not in percentages, it seems i'm still on the older firmware version. The issue is when hitting 100% battery charge, when there is no source for charging even if there is no load, the voltage is being dropped to 50 V. As it seems for the inverter the maximum voltage for the batteries should be 50 v. I really don't have any clue on how to fix it. Do you think changing from SUB to SBU would change the behavior?

Thanks for the reply, The batteries are deep cycle tall tubular ones Number of batteries: 4 Below are the settings 1- sub 2- 60 3- APL 4- dls 5- FLD ( I also tried USE) 6- dls 7- dls 8- 230 9- 50 10- 4 11- 40 12- 48 13- 56 14- snu 15- OFF 16- OFF 17- OFF 18- dls 19- 58.4 20- 56 21- 43.6

Hello, I'm a newbie to renewable energy and solar. I have installed a 2.7 KW 48 v system with 6 panels 450 W each, Growatt SPF 5000 es inverter, and 4 Lead-acid batteries. Everything is running smoothly, except that the inverter is not keeping the floating voltage for batteries above 50 v. While charging the batteries voltage is between 56 and 58 v, but automatically the inverter is discharging till 50 v. Please check the attached two images I tried with USE and FLD batteries types with default values but with no success. Can someone help? Thank you