Inverter Recommendations

[chonvlc]

Hello,
I am designing a PV array in Switzerland. I am using Panasonic N240 HIT modules. I have 602 modules on one roof and 731 modules on the adjacent roof. I am considering SMA TriPower 15,000TL (10 modules per string) inverters for now, however this is a quite costly option and would like to know if there is a better configuration to reduce the capital cost of the system.
(These inverters are quoted at around 22,000 British Pounds Sterling each)
Thanks.

 

[Pascaleto]

You should install 21 panels per string - 3 strings per inverter. You can Use 20000TL it is more cheap.
You can use PowerOne 27,6 inverters even cheaper.
All strings have to be around 21 panels - depending on lower temperatures in the region.

 

[SibertSolar]

OP is using HiT panels Pascaleto....higher voltage/current ratio than most "normal" c-Si panels.

Would definitely recommend you look at the P1 Trio units though as you might find it more economical in terms of value, and cost of BoS.

 

[ExtremePV]

Have a look at the SMA Project Performance Package. It is designed for projects over 100kw and its cost per watt is excellent. Well worth looking at.
Ken

 

[Worcester]

Only problem with the SMA PPP option is it is based around the 20000TLEE and that limits the panels and string design that you can use dramatically

 

[Gavin A]

power-one 30kW (27.4) inverters will work out cheaper than the SMA, though for the size you're at you could be better looking at one of the bigger cabinet units.

 

[SibertSolar]

I would say that 10 or 11 PowerOne Trio 27.6 units would be ideal. Better than 1 or 2 central inverters for multiple reasons at that size a system - string flexibility, optimum MPP tracking, outdoor rated, longer warranty, better performance/efficiency, better value and ease of handling for example.

 

[Pascaleto]

Only thing I didn't understand is way using Panasonic 240Wp. Panasonic is so expensive! And looking for cheap inverter?
You are wrong in the very beginning.

 

[PowerInverterCN]

beware if your tools need "true sinewave" that's going ti be a lot more expensive than "modified sinewave"...which is essentially square wave...some AC motors don't respond well to that...