My Growatt inverter seems to be underperforming when it comes to charging my lithium battery, as it's only providing a maximum of 2.7 kW from the grid. However, I noticed that by adjusting the inverter settings and switching the battery type to lead acid, the inverter is able to charge the battery at a higher rate, reaching up to 3.8 kW. I've already verified that the charging current setting is at 100%, yet the issue persists when using a lithium battery. Has anyone else encountered a similar problem and can offer assistance in resolving it? Your help would be greatly appreciated. Thank you!
Growatt inverter SPH 5000TL BL-UP charging battery issue.
- Thread starter Jbstudio
- Start date
Samsonite801
Solar Wizard
- Joined
- Oct 15, 2020
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- 2,997
Did you ever happen to try setting the battery type to custom user profile on the charge profile and plug in manual settings like here:
diysolarforum.com
or here:
diysolarforum.com
The thing I wonder about setting it to lithium, is if it is trying to charge using battery comms (via CANbus or RS485) cable and not getting good communication received, or something weird like that.
Settings to custom user profile will allow it to charge based on voltages, comms are not really needed anyways.
I am not a Growatt enthusiast so my answer may be somewhat generic as I am not as familiar with working on those models, but just thought I'd throw in my quick suggestion for something to check or try as a test to see if you can improve the charging rate.
How does it perform on solar charging? Or do you have any solar attached?
Recommended Charge Profile for DIY LiFePO4 Batteries *Sticky Post*
12V 4S LiFePO4 Battery w/ BMS: Absorption: 14.5V Float: 13.6V Inverter Cut-off: 10.7V-12V (depending on size of load and voltage drop etc) 24V 8S LiFePO4 Battery w/ BMS Absorption: 29V Float: 27.2V Inverter Cut-off: 21.4V-24V 48V 16S LiFePO4 Battery w/ BMS Absorption: 58V Float: 54.4V...
diysolarforum.com
or here:
Best LifePo4 charge controller settings known to man for Maximum Service life and Minimum battery stress!!! 5,000-10,000+ cycles?
---ORIGINAL TITLE---- Best charge controller settings to achieve 10%-90% usage on lifepo4 ? EDIT-UPDATE and the ANSWER to this question. . . This post is a accumulation of all the great and wonderful information given to me by all the great people on this thread. I consolidated all of this...
diysolarforum.com
The thing I wonder about setting it to lithium, is if it is trying to charge using battery comms (via CANbus or RS485) cable and not getting good communication received, or something weird like that.
Settings to custom user profile will allow it to charge based on voltages, comms are not really needed anyways.
I am not a Growatt enthusiast so my answer may be somewhat generic as I am not as familiar with working on those models, but just thought I'd throw in my quick suggestion for something to check or try as a test to see if you can improve the charging rate.
How does it perform on solar charging? Or do you have any solar attached?
WOLF-GANG
New Member
Could you do me a favor and let me know 2 registers of your inverter if you still use that SPH 5000?
I am looking for the values of register 29 and 121
Those are the limiting factors which limit the output (not the charging). SPH 4600 and 5000 single phase are able to generate the 6000 Watt just by tweaking them.
Thanks a lot
Sidewaysmike
New Member
Hi Wolf Gang can you tell me what these settings are and how to change them. I have a sph5000tl bl-up and would like to maximize its output if possible. Currently inverter clips at 5.1kw with full battery and only charges and discharges at 3kw the data sheet for this model says discharge and charge at 4kw
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