Inverter shows isolation fault but resets to working mode after sun up

Depends on power requirement. My whole house uses approx 4 kW to run air con and rest of the house power. 19 x 350 solar panels generates 1 kw to 6.5 kw per hour through a 6 kw inverter.
The variance comes from the sun is not always out, or behind clouds and the panels don't face east and west to capture the morning and evening sun.
They are mono crystal which generate about 1 to 1.6 Kw in cloudy conditions.

As I am on the power grid the excess power is feed back to the power company who pay me 6c per k/w that I feed in during sunny days and then charge me 26c per k/w in peak times when it is dark !
Today I got 40 kw/h generated for the day which with feed in tariff is $2.60 as it was sunny. . I could run the air con on 10 kw/h from the power company in the dark , if the a/c used 2 kw I could run it for 5 hours for free.
Where you run into problem is that on a cloudy day you might get 1 k/w per hour . This is not a problem if you use mains power from a power line supplier as it suppliments any short fall. If you are on a no grid connected system you may need to consider Battery Storage as well to charge up when the sun is out and then it supplements the power to your house when it is cloudy or dark.
The solar panels would need to generate enough power to run the house and to charge up the battery system if used.
Batteries have a limited life of 10 years and usually use lithium Phosphate batteries . You tube has many videos on battery systems and off grid solar setups. However batteries are a changing technology with Electric Vehicles becoming more common.

First I assume that you thinking about kVa not KV? or you really have 10000 Volts generator?

why would you like to add inverter? Considering your setup there is no need for inverter.
the only way you need inverter is when you have dedicated battery bank. This way system would work this way. On sunny day you produce electricity to feed your house and charge battery bank using charger/inverter. Once solar panels atop producing electricity during night system automatically switches to inverter mode and you start using power from batteries. Once batteries goes low then generator kicks in and supply power to home and recharge batteries. Without dedicated batteries there is no use for inverter

what does the timer look like? Any names or stickers on it?

I like to ask, is the voltage from the solar panel messure with some load connected or is open circuit, normally solar panels produce high voltage than the working system, the reasson for that is to have Amperes in of to charge the batery, these is related to the size and power generated by the panel.
No need a resistor or in any case use a voltage regulator to prevent over charge.

Sounds to me like it is defrosting the outdoor unit. Is this possible? The process takes a little bit to complete but it will then start up again.

Unplug the inverter, and have the outlet tested. After being unplugged for a while, the inverter should reset when it is plugged into a grounded outlet.

Normally fault codes are letters? I am not familiar with that code at all. You may have got the control in some configuration setup code 3P0(X) is for raising and lowering the voltage where X is a number from 1-9 for increase

good day. Your slk is currently in 'limp mode' that's why it's stuck in first gear. you shouyld have it checked by a mechanic to reset the codes and find the faults.

Get a can of WD 40 spray lubricant at any auto parts store and carefully lubricate all of the moving parts of the roof system. This will likely solve your problem.