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"Maximum System Voltage"- Considerations for an RV Solar Array

TedH

New Member
Joined
Jun 5, 2020
Messages
185
On my 250watt poly panels from San Tan Solar, maximum system voltage is indicated as 600V (UL). Is this the maximum voltage permitted in a series of panels?

I plan to install 6-8 panels (2 in series and then parallel

Specifications:

Rated Power: 250W
Open circuit voltage (VOC): 37.6 V
Max power voltage (VMP): 30.3 V
Short circuit current (ISC): 8.85 A
Max power current: 8.27 A
Power Tolerance 0/+3%
Maximum system voltage: 600V (UL)
Fuse Rating: 15 A
IP65 Junction Box w/MC4 Compatible Connectors
Frame: Anodized aluminum alloy
Weight: 41 lbs
Dimensions: 1650 × 992 × 35mm (64.95 × 39.05 × 1.37 inches)
pairs).

I would have four pairs of 30.3v panels or 60.6V per pair. This works with my Solar Charge controller (SCC) that accepts a voltage range from the panels. 60V falls in the lower end of that accepted range. Max watts for the SCC is 1700watts (24v system). What is nice is that the SCC also works with 36 and 48v systems (Aims 60amp SCC).

My question: is the max system voltage the maximum voltage that I may configure a serial string of panels? If so, that would appear that I am well within the limits as I would have 60.6V pairs (about 11% of the max voltage).
 
You are correct. If you wire 16 of them in series, you would exceed the 600v maximum and be at 601.2v.

You are way under the limit and have nothing to worry about.
 
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