Czy wolisz polską wersję strony elektroda?
Nie, dziękuję Przekieruj mnie tamiwostar wrote:Will 15 + 10 panels be pulled by any single-phase inverter at all?
The current one (SOFAR 4KTLM-G2) only sometimes does not pull 15 pcs on one circuit, as my minimum 600 V is exceeded
3301 wrote:the problem in this case is not the power but the voltage of these 15 series connected panels,
witekem wrote:Check out Sunspec, because many Chinese are rejected because they don't meet macroinstruction requirements
BikeBarian wrote:3301 wrote:the problem in this case is not the power but the voltage of these 15 series connected panels,
How is the voltage to be a problem ?? .. since those in the STC 15 panels in a series give max 500V ... do you mean the open circuit voltage ?? .. but then the max is 600V.
3301 wrote:BikeBarian wrote:3301 wrote:the problem in this case is not the power but the voltage of these 15 series connected panels,
How is the voltage to be a problem ?? .. since those in the STC 15 panels in a series give max 500V ... do you mean the open circuit voltage ?? .. but then the max is 600V.
Exactly, and if you convert this voltage Voc to a temperature of -25 C, taking into account the temperature coefficient of the module, with 15 pcs, the string voltage may be above 700 V
BikeBarian wrote:3301 wrote:BikeBarian wrote:3301 wrote:the problem in this case is not the power but the voltage of these 15 series connected panels,
How is the voltage to be a problem ?? .. since those in the STC 15 panels in a series give max 500V ... do you mean the open circuit voltage ?? .. but then the max is 600V.
Exactly, and if you convert this voltage Voc to a temperature of -25 C, taking into account the temperature coefficient of the module, with 15 pcs, the string voltage may be above 700 V
As we have already touched on this topic:
1) should the open-circuit voltage play no role here as the inverter always works under load, which means that Vmpp panels are also important here ??
2) If Vdc after take into account temperature coefficient will increase at -25oC by 5V, will the current also increase and thus the panel power ?? ... because if so, then we exceed the maximum allowable current per string ... and this regardless of the number of panels in the string.
Mirek_Gab wrote:I chose the Sofar (I have 5.5KTL-X). As the colleague above writes, the difference in price is almost a year longer return on investment. All devices are designed for a long service life and only time can verify this. By the way- and the Fronius also breaks
TL;DR: Field owners report 0–20 % daily energy loss when Sofar inverters trip on 253 V grid peaks; “set Country Code 12 for Poland and the problem goes away” [Elektroda, 3301, post #18624621] Why it matters: one menu setting often fixes most unexpected shutdowns without replacing hardware.
• Max. DC input voltage 1000 V & MPPT window 240-850 V (Sofar 8.8KTL-X manual [Uri, #18921613]) • Recommended DC/AC oversize ratio ≤ 1.2 : 1 for KTL-X models [Elektroda, BikeBarian, post #18360391] • Country Code list: PL = 12, DE = 07, NL = 05 [Elektroda, Defence & 3301, post #18851696] • Typical firmware: V2.30 (increases AC limit from 4.0 kW to 4.4 kW on 4.4KTL-X) [Elektroda, prose, post #19034268] • Service e-mail: service.pl@sofarsolar.com; hotline +48 22 123 98 58 [Elektroda, AT PRO, post #18772451]
