Colorado_Al
RV & Tiny Home
- Joined
- Nov 24, 2020
- Messages
- 25
I have some questions about setting up the Growatt system with solar as primary charging and a manual start generator as backup.
I have a 1.9kw solar array and it seems to be charging the 2 GYLL 48v LiFePo4 correctly.
I have the Growatt set to program 01 (output source priority) SBU priority = Solar > Battery > Utility (generator powers loads only when battery is 48v or less)
Program 03 (AC Input Voltage range) set to GEN = generator
Program 05 (Battery Type) set to USE = user defined
Program 14 (Charger source priority) set to SNU = Solar and Utility - to allow solar and generator to concurrently charge the batteries if needed
Program 19 (Bulk charging voltage) set to 56v
Program 21 (Low DC cut-off voltage) set to 48v
A few questions:
Does everything above look correct?
Would I be better off selecting Program 01 as SOL so generator could power loads when either solar not avail or battery voltage below 48v?
Program 20 (Floating Charge voltage) It is currently the default of 54v. Not sure about this because I though LiFePo4 don't need float charging?
Program 12 (Setting voltage point back to utility source) should this be set to the same as the Low voltage cut-off? currently default of 46v
Program 13 (Setting voltage point back to battery mode) default is 54v - does this mean that after the battery is at 54v, the generator will no longer charge the batteries? Should this be set to 56v to match the bulk charge voltage?
Thanks for any help or tips you can provide. Thanks!
Al
I have a 1.9kw solar array and it seems to be charging the 2 GYLL 48v LiFePo4 correctly.
I have the Growatt set to program 01 (output source priority) SBU priority = Solar > Battery > Utility (generator powers loads only when battery is 48v or less)
Program 03 (AC Input Voltage range) set to GEN = generator
Program 05 (Battery Type) set to USE = user defined
Program 14 (Charger source priority) set to SNU = Solar and Utility - to allow solar and generator to concurrently charge the batteries if needed
Program 19 (Bulk charging voltage) set to 56v
Program 21 (Low DC cut-off voltage) set to 48v
A few questions:
Does everything above look correct?
Would I be better off selecting Program 01 as SOL so generator could power loads when either solar not avail or battery voltage below 48v?
Program 20 (Floating Charge voltage) It is currently the default of 54v. Not sure about this because I though LiFePo4 don't need float charging?
Program 12 (Setting voltage point back to utility source) should this be set to the same as the Low voltage cut-off? currently default of 46v
Program 13 (Setting voltage point back to battery mode) default is 54v - does this mean that after the battery is at 54v, the generator will no longer charge the batteries? Should this be set to 56v to match the bulk charge voltage?
Thanks for any help or tips you can provide. Thanks!
Al
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