Si-Fact­ory is a pro­ject run by Rol­tec in par­al­lel with the thin-film photo­vol­ta­ics pro­ject. We have launched the pro­duc­tion of high-qual­ity mono­crys­tal­line bifa­cial sil­ic­on mod­ules. Intens­ive expan­sion: a new hall and pro­duc­tion line in 2024 will allow for sig­ni­fic­ant auto­ma­tion and a dra­mat­ic increase in pro­duc­tion. We com­bine pro­duc­tion with the dir­ect imple­ment­a­tion of photo­vol­ta­ic farms.

The pro­ject, fin­anced and imple­men­ted entirely from the com­pany’s funds, serves to meet its own energy needs. All pro­duc­tion is dir­ec­ted dir­ectly to the imple­ment­a­tion of our install­a­tions. We have developed and imple­men­ted a com­plete sol­ar farm sys­tem for all types of sur­faces. We install our mod­ules with the help of third parties on flat roofs, slop­ing roofs and on the ground. We estim­ate the install­a­tions planned in the com­ing years at 40 MW. In 2024, we are imple­ment­ing invest­ments in the Wielko­pol­ska, Łódź and Lower Silesia voivode­ships with a total capa­city of nearly 10 MW.

Full Bifa­cial Mod­ule G1

Rol­tec Bifa­cial G1 mod­ules have glass on both sides, unlike tra­di­tion­al mod­ules. The act­ive lay­er is loc­ated on two sides, so light is absorbed from both sides (i.e. also the light reflec­ted from the sub­strate). The mod­ules achieve effi­ciency at the peak point that is up to 30% high­er com­pared to single-sided PV mod­ules (which depends mainly on the albedo). Addi­tion­ally, glass-glass tech­no­logy increases the mod­ule’s lifespan. It is highly res­ist­ant to mech­an­ic­al dam­age, micro­cracks, salt mist, ammo­nia and fire.

Mod­ule type:

Pro­duc­tion technology

Mono­crys­tal­line sil­ic­on photo­vol­ta­ic mod­ules are pro­duced on a par­tially auto­mated pro­duc­tion line, guar­an­tee­ing high qual­ity and repeat­ab­il­ity of the pro­cess. At the same time, our research and devel­op­ment depart­ment con­ducts con­tinu­ous work to improve the effi­ciency, qual­ity and dur­ab­il­ity of our modules.

The first stage of photo­vol­ta­ic mod­ule pro­duc­tion is seri­al con­nec­tion of indi­vidu­al cells using con­nect­ing tapes. Dur­ing the sol­der­ing pro­cess, the employ­ee elim­in­ates dam­aged cells. The con­nec­ted cells are placed on a glass covered with EVA foil and then elec­tric­ally con­nec­ted (soldered) to each oth­er. After join­ing, sub­sequent lay­ers of EVA foil and a 3 mm tempered top glass are applied, pro­tect­ing the mod­ule against extern­al factors. Then the edges of the mod­ule are secured with a spe­cial tape. The mod­ule pre­pared in this way is lam­in­ated (in an oven) at a tem­per­at­ure of approx­im­ately 140°C, where it is com­pletely encap­su­lated. In the final stage, a junc­tion box with cables is moun­ted to the bot­tom sur­face of the module.

Ready photo­vol­ta­ic mod­ules are checked on a sol­ar radi­ation sim­u­lat­or under stand­ard test­ing con­di­tions (STC: 1000W/m2, 25°C, AM1.5G), where elec­tric­al para­met­ers are determ­ined, such as max­im­um power (Wp), short-cir­cuit cur­rent (Isc). , open cir­cuit voltage (Voc). The mod­ules meet all applic­able stand­ards for the design and safety of photo­vol­ta­ic mod­ules (IEC61215, IEC61730, IEC63092, IEC TS 62941).

The Si-FACT­ORY pro­ject in numbers:

Our per­form­ances

We imple­ment sol­ar install­a­tions on roofs and on the ground based on ded­ic­ated and proven components.

Installing a photo­vol­ta­ic farm often involves the con­struc­tion or expan­sion of exist­ing trans­former stations.

A com­pre­hens­ive approach — start­ing from the pro­duc­tion of mod­ules and end­ing with the con­struc­tion of the farm guar­an­tees max­im­um reduc­tion in the costs of kWh production.

The com­plete install­a­tion includes:

  • G1 sol­ar modules,
  • sup­port­ing structure,
  • invert­ers (Sofar),
  • wir­ing,
  • elec­tri­city meters,
  • mon­it­or­ing application.