I have the above Axpert inverter  2* Hubble 5.5kw Batteries and 6 Canadian solar 455 w panels .

I have purchased another 6 Solar panels but am unsure if this inverter can handle them. The inverter manual i downloaded from this forum (which seems to be a generic Axpert type manual and does not mention model numbers ) shows different specs to the specs on the inverter. see pics below

Am i correct that if I go by the specs on the inverter which says rated current of 80 A and a max 145VOC  I should be able to install a Max of 11600w of panels ?????

I am planning to have 4 sets (in parallel) of 3 by 455w solar panels (in series)     At the moment I have 2 sets of 3  and am below the max allowable of 145V  and  the max power they seem to generate is 2400w      i.e if I install the other 6 I should end up with a max voltage of about 125 V  and max 5000W  i.e max 40 Amps

Dont want to blow the inverter

Much appreciated

 

Working back from the 80A charging at 48V seems like the label picture that you can only use 3840W from PV. This means 12 x 455W you will be exceeding the PV and is a major risk to the MPPT controller. Exceeding by 10% I would think is still fine. About 4200W the maximum for panels. The 5kW size is only from the battery to loads. 

Thanks

so if I just add another 3 in parallel i should be fine ??????? That would be a absolute max of 4000w

52 minutes ago, GrantRichmond said:

Thanks

so if I just add another 3 in parallel i should be fine ??????? That would be a absolute max of 4000w

From the available information and working back from the 80A at 48V it would seem that the MPPT can accept about 30A from panels from your quoted 125V from 3 in series. This then appears as if 3S3P would be OK. In Gauteng we normally see about 80% of panel output as a full time rating and only the peak power at panel ratings for short bursts during cloud edge. 

Personally I try to stay a few % below the maximum values for these inverters. Call me bang Jan. Reason is components used are not always the best quality. During the last week we had to change 100's of 1% resistors that were 5% out and affected PSU outputs. These came in manufactured for us. The boxes of resistors we buy were within about 1%. 

Edited February 11, 20233 yr by Scorp007

If the specs in this datasheet are to be believed then 4000W max 80A seems to be the rating. 

The SCC is nominally 4000 W (80 A x 50 V). The 80 A is on the battery side, not the panel side.

I find it's safe to overpower these inverters by a maximum of 20%. That's based on experience with the amount of over-shoot that is inevitable.

So that's a max of 4800/455 = 10 panels, but since you are wiring 3S, that would be a max of 9 panes (3 paralleled strings of 3S each).

It's good to see that the 145 V max inverters are still in use. I have two myself; they were the last of the 60 A rated SCC models, still PF 0.8 back then.