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please help with which inverter i need

i really dont want to come accross as unhelpfull, and i could work it out for you, but that wouldnt help you really.

Why dont you do some basic sums and work it out.

The first one is simple, and the middle one divide by two and use two phases with two inverters and the last divide into three systems over three phases.

Inverters are linked to the panels voltage and current, so it depends on what panels your using.

If you post it in here i will help you with it.
 
also note the Vmpp value of the string you will be connecting the inverter (Vmp of one module times the total number of modules on the string). Then apply the the 80% rule to it and if the value is still greater than the lowest value of the inverters MPP tracker the the system will still work as intended in 25 years time.
 
many thanks for the reply

the panels we are using are the bp-4180t

the spec on the property is:

facing SSW 200 degrees
roof angle is 25 degree (a little shallow)
on the coast in the southwest of england
and the roof size can easily fit the 9.76kw system, so i think this is the system we should aim for
 
many thanks for the reply

the panels we are using are the bp-4180t

the spec on the property is:

facing SSW 200 degrees
roof angle is 25 degree (a little shallow)
on the coast in the southwest of england
and the roof size can easily fit the 9.76kw system, so i think this is the system we should aim for
 
good, that will make everything a lot easier for you to install in terms of the larger two arrays
 
as it is a 3 phase 9.72kw system, which = 3.24kw a phase does that mean they will get 41.3p a kw or the lower rate as the total is above 4 kw
 

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