AlaskanNoob
Solar Enthusiast
- Joined
- Feb 20, 2021
- Messages
- 906
So I've got my Honda 7000 powering an EG4 Chargeverter which is wired into my 48V bus bar. I have it set to charge my 8 x Pylontech US5000 batteries at 52V and 100A.
I started off with my bank showing 91% SOC and I started screen capping at around 50.7V. AC loads were about 300W. The battery was showing charging with about 4500W. Over more than thirty minutes, the battery voltage had climbed to 51.9V and the amps had dropped and the battery charge had dropped to about 1500W. I shut off the generator when the battery was showing 51.9V and about 24A.
But it showed 91% SOC the entire time. I was expecting the 38KW battery bank would have climbed in SOC by about 1% every ten minutes or so. Why did that not happen? I have frequently seen my SOC at 100% or 99% with the battery at 49.9V. Does the system just need time to balance the cells and get a correct average before it corrects the SOC?
Another question. The Pylontech ramps the MPPT down so that it only sends the power it needs. With me using the Chargeverter, I'm taking the Pylontech's ability to ramp the power down on the bus bar out of the equation. I worry that I might over voltage them or send them too much power as a result. However, it seems to me that by setting 52V on the Chargeverter, that shouldn't happen. And since the charge to the battery drops, that seems like it shouldn't happen, but I'm not sure. I've heard that power isn't SENT to batteries, it TAKES power. If that's the case, why does the Pylontech through the Victron VE.BUS ramp down what the MPPT sends to the bus bar?
Many thanks for helping me understand what is going on here.
I started off with my bank showing 91% SOC and I started screen capping at around 50.7V. AC loads were about 300W. The battery was showing charging with about 4500W. Over more than thirty minutes, the battery voltage had climbed to 51.9V and the amps had dropped and the battery charge had dropped to about 1500W. I shut off the generator when the battery was showing 51.9V and about 24A.
But it showed 91% SOC the entire time. I was expecting the 38KW battery bank would have climbed in SOC by about 1% every ten minutes or so. Why did that not happen? I have frequently seen my SOC at 100% or 99% with the battery at 49.9V. Does the system just need time to balance the cells and get a correct average before it corrects the SOC?
Another question. The Pylontech ramps the MPPT down so that it only sends the power it needs. With me using the Chargeverter, I'm taking the Pylontech's ability to ramp the power down on the bus bar out of the equation. I worry that I might over voltage them or send them too much power as a result. However, it seems to me that by setting 52V on the Chargeverter, that shouldn't happen. And since the charge to the battery drops, that seems like it shouldn't happen, but I'm not sure. I've heard that power isn't SENT to batteries, it TAKES power. If that's the case, why does the Pylontech through the Victron VE.BUS ramp down what the MPPT sends to the bus bar?
Many thanks for helping me understand what is going on here.
Last edited: