Pylontech stack - additional charger?
Posted: Tue Oct 31, 2023 8:10 pm
Evening all, after a bit of assistance again from you kind and knowledgable guys.
Quick recap.
I have an existing 4kw FIT system, and has a new 5.45kw Sunsynk Ecco 3.6 hydrid system with 4xus5000's added as a separate system. All AC coupled.
Sunsynk invertor has taken some getting used to, lots of complicated settings to operate it, but a typically appaling manual that explains nothing whatsoever, together with an overly enthusiastic company CEO who, although well clued up, struggles to explain things clearly for an amateur like me to understand also.
System works fine now i have fathomed it out, but i have noted that the power provided by the FIT system doesnt get fed back to the Pylontechs to be stored as i thought it would. So im wondering if there is a way around this to help during the winter with battery charging (the summer wont be a problem im certain).
What ive noted on the Pylontech stack os that there is a spare positive and neutral connection across the stack, one connection on the top battery and one connection at the bottom.
So what im thinking is is it possible to use my existing Marlec iboost to connect up a separate battery charger (as per below) directly to these 'spare' connections to utilise the power that my uncontrolled FIT system is kindly sending back down the Grid currently?
In effect, charge my pylontechs from both my new solar, and via the separate charger at the same time.
Im assuming that the pylontech BMS will control the charge from the Sunsynk as currently, and that the battery charger will have its own controls to also sense when the batteries are full also, so neither will 'cook' the battery.
Hope that makes sense and im not just making myself sound more of a dummy than i usually manage.
Have attached schematic and details of charger.
Have also attached a 'teaser' photo of a split A2A heatpump that ive installed, thanks to the excellent writeups on here from a few of you. Managed to hide my pipework in boxing in the garage, and knocked up a housing to try and keep the salty sea rain off the condensor. Will do a write up and post the piccies when i get chance. a thousand thanks for the inspiration.
Thanks guys
Quick recap.
I have an existing 4kw FIT system, and has a new 5.45kw Sunsynk Ecco 3.6 hydrid system with 4xus5000's added as a separate system. All AC coupled.
Sunsynk invertor has taken some getting used to, lots of complicated settings to operate it, but a typically appaling manual that explains nothing whatsoever, together with an overly enthusiastic company CEO who, although well clued up, struggles to explain things clearly for an amateur like me to understand also.
System works fine now i have fathomed it out, but i have noted that the power provided by the FIT system doesnt get fed back to the Pylontechs to be stored as i thought it would. So im wondering if there is a way around this to help during the winter with battery charging (the summer wont be a problem im certain).
What ive noted on the Pylontech stack os that there is a spare positive and neutral connection across the stack, one connection on the top battery and one connection at the bottom.
So what im thinking is is it possible to use my existing Marlec iboost to connect up a separate battery charger (as per below) directly to these 'spare' connections to utilise the power that my uncontrolled FIT system is kindly sending back down the Grid currently?
In effect, charge my pylontechs from both my new solar, and via the separate charger at the same time.
Im assuming that the pylontech BMS will control the charge from the Sunsynk as currently, and that the battery charger will have its own controls to also sense when the batteries are full also, so neither will 'cook' the battery.
Hope that makes sense and im not just making myself sound more of a dummy than i usually manage.
Have attached schematic and details of charger.
Have also attached a 'teaser' photo of a split A2A heatpump that ive installed, thanks to the excellent writeups on here from a few of you. Managed to hide my pipework in boxing in the garage, and knocked up a housing to try and keep the salty sea rain off the condensor. Will do a write up and post the piccies when i get chance. a thousand thanks for the inspiration.
Thanks guys
