I have a 10 kVA Rite Deltec system and i want to power it by way of solar power can this work

A 5 KVA (kilovolt-ampere) UPS (uninterruptible power supply) typically supports a range of devices depending on their power requirements. It's important to note that the number of systems that can connect to the UPS will vary based on the power consumption of each individual system. As an example, if we consider an average desktop computer with a power consumption of around 300 watts, the 5 KVA UPS could potentially support around 16-17 such systems. However, this number could be higher or lower depending on the specific power demands of the devices being connected. Additionally, it's worth noting that VAT deregistration (https://calculatethevat.com/vat-deregistration) involves the process of removing a business from the Value Added Tax system, which can have financial and administrative implications.

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

As long as you know the charging voltage of the battery.

Yes.
Wrong wiring connections or shorted out motor.

Six KVA is the same as 6000 watts. As you can see, the appliances have to be totaled up to the amount of 6000 watts to see how many can be used. Each device has its own wattage on the manufactures label and it is usually different for different appliances.

you can download the user manual on their website.

kva = kilo-volt-amps

watts = volts x amps = va

Therefore, 5.8kva = 5800 watts

It uses 4x12v @ 26AH batteries in series, making a total of 48v (more like 52v if charged).

For deltec PRR2200i you got 4 pcs of 12 volts batteries and it was just connected in series