Hi Guys. I recently changed from my older Mecer 5kw axpert inverter to the new synapse 7.2m+ .

all working nicely except for some reason my PV doesn’t actually generate watts or show them.

using either WatchPower or solarassist I can see the PV volts over 80 but no watts. 
if I activate SBU mode or trip the grid I see watts for a few seconds then back to 0 again. Therefore only batteries provide power and not the PV…

 

see picture.

any ideas what could be causing this ? 

2 hours ago, Doron said:

new synapse 7.2m+

Don't know the unit, but if its anything like this unit, then the specs on the MPPT end would require rewiring for Voltage, rather than Current, methinks...

Max PV Array VOC: 500V DC

MPPT Range @ Operating Voltage: 90 ~ 450V DC

Thanks Guys. Makes sense. Yes I only have 4 panels on the roof as the setup is more of a backup system running 4 x 4.8kw lithium’s . 
man I correct in assuming then I’m going to require more panels to up the voltage from the pv ? 
 

No need for more panels if you just want to keep your batteries full. Your panels are likely connected 2s2p. They just need to be connected 4s. 

16 hours ago, gooseberry said:

No need for more panels if you just want to keep your batteries full. Your panels are likely connected 2s2p. They just need to be connected 4s. 

I agree. 4S will get close to 200V (Depending on what panels are used of course)

On 2021/07/18 at 8:59 PM, Doron said:

Thanks Guys. Makes sense. Yes I only have 4 panels on the roof as the setup is more of a backup system running 4 x 4.8kw lithium’s . 
man I correct in assuming then I’m going to require more panels to up the voltage from the pv ? 
 

Just provide Voc and Vmp for the panels and size. It will help to assist. 

Hi All

 

problem was solved by connecting the 4 panels in series. all sorted thanks