The AUX port on paralleled inverters
This is so confusing, no wonder my original installer has run away!
OK I have two 3.6kw Sunsynk inverters paralleled together (master and slave) to give me 7.2kw capacity, they are connected to a 40kwh bank of Sunsynk lithium batteries and a 9kwp solar array.
Very happy with the system and the way it operates (apart from a nusance tripping issue when raining-now sorted)
This summer I would like to avoid sending any power back to the grid if I can possibly use it myself, so to that end I have fitted a 3kw immersion heater to my hot water tank to use as a solar dump and save the cost of gas heating the hot water.
I have spent hours sifting through all the posts about setting up the Aux port and I am pretty sure I understand how to set it up (despite the contradictory advice in the Sunsynk manual).
Now to my question;-
My inverters are parallel wired,- (grid and battery connections only) and are set up to share the load/charging 50/50 no problem so far, but the immersion (3kw) is to be wired off of the master inverter aux (generarator) port only, do I need to link the master aux (generator)and slave aux (generator) ports together to share the 3kw load between the two inverters and prevent the 3kw immersion from tripping the master inverter or will the two inverters adjust as required?
Again there is contradicting advice in the manuals and even on the Youtube tutorials.
Although I have not done an exhaustive search I cannot find anything on this forum about this.
Any help much appreciated, thanks.
Thanks for the advice, I will change the low batt to 25%.
There is a very good reason why the charging current is set to 57 amps;- my mains connection is only a 60 amp supply (I am waiting for national grid to "de loop" and upgrade me) in the mean time I am restricted to 13.8 kW maximum import power, National Grid says that the main fuse (60A) will take a 50% overload for 4 hours -Hmm ok, but I dont want to end up with nothing waiting days for nat grid to come and replace the fuse.
That setting (57A) restricts the power pulled from the mains to 6kW, allowing the rest to be avaliable for charging my EV and running the house.
Even set at 57 amps I have 4 hours a day 00:30 - 04:30 when my tariff drops to 9p kWh to charge all my batteries and so far I have always managed to charge them to 85% with time to spare.
Over the last couple of weeks the output from my PV Panels has been rising rapidly (I saw over 4 kW peak today) so the sun is getting stronger and soon, as long as the weather is like last year I will no longer need to import any power until October/November.
Looking forward to generating enough this year to run the house, charge the car and heat my hot water, you never know I might even get to export some😊, fingers crossed for a sunny summer.
I dont know that I have a SOC issue its more a fully charged issue.
If I cannot connect to the batts and check their conditon I will just have to trust in the SS BMS.