How can I reduce or supress the in-rush current for an inverter?
I have a pair of 100 watt solar panels feeding into a solar regulator (TPS 1230) which is connected to a 12v 100 Ah lead acid battery and a 2Kw inverter connected to a 50watt fridge.
The solar regulator claims to be ’10 amp’ and the inverter draws 4-5 amps when the fridge is on. So, in theory the two ought to be compatible. In practice whenever the fridge switches itself on and the inverter kicks in then the solar regulator trips out and needs to be manually reset.
To cure this I tried upgrading to a 30 amp regulator (MPPT30 like this), the good news is that this one only trips out 50% of the time, the bad news is that it still trips out 50% of the time.
How can I cure this? My guess is that the regulator is tripping out due to a large in rush current when the inverter is switched on, I can measure the steady-state current (about 4-5amps) with a multi-meter, but have no idea what the in-rush current might be.
I know that I could connect the inverter directly to the 12v battery (I’ve tried doing that and it works fine) but by doing that I loose all the battery health and charge status information that the solar regulator gives me (with the load going via the regulator I get to monitor the inverter current and the health of the battery, I lose this if I connect the load straight to the battery)
Is there anyway to suppress the initial current surge of the inverter and prevent the regulator from tripping?