Henning

Thanks for this interesting and useful forum. Does anyone out there have some experience with the Sunsynk hybrid type inverters (5kw or 8kw) which are touted as superior to the Axpert Voltronic / Mecer type of inverters with all the bells and whistles. I first installed a Victron Energy Quatro 5 kva with 4 x FNB Excis batteries (not ideal but 4 years ago got them for a good price) as back-up where I live - the place is renowned for power interruptions - DB split into essential and non-essential loads - inverter fitted to one phase of my three phase home grid power supply. Later fitted a Fronius 10 kw three phase grid tie inverter with 15 x 410 Watt Sunpower panels - system is running fine for now - had to clean the panels though following substantial soiling in a very dusty environment. I am keen on AC coupling but it will be a costly excercise for a three phase system and the 1 to 1 power factor rule will limit my power output / consumption if I fit 3 x Victron 3 kva Multis on each phase. I am keen to try out the Hoymiles Micro grid tie inverters, assisting someone else, and link them to 5kw Sunsynk inverter's bi-directional generator port with a lithium battery incorporated - according to the supplier this system works well - anyone with experience / recommendations on this particular combination. I am aware that the Sunsynk inverter alsso has a built in MPPT solar charge controller of I think about 60 Amp but I am tempted to do a AC coupled / DC coupled mix by fitting one 1200 Watt Hoymiles micro grid tie inverter with its own 4 panels to the generator port of the Sunsynk inverter due to its higher efficiency / less loss through AC wiring. The Sunsynks built in MPPT will then be used to link the other panel string. Any ideas and comments will be welcome