Understanding the Upper DC Voltage Limit of Sunshine Inverters
Think of voltage limits like speed governors on vehicles – they prevent dangerous overloads while allowing optimal performance. Most Sunshine models support 600V to 1500V DC input,
Photovoltaic System Voltage, DC Source Circuit, DC Output Circuit - The maximum photovoltaic source and output circuit voltage shall be the rated open-circuit voltage of the photovoltaic power source multiplied by 125%.
Recommended max. PV power 1 *1 Inverter max input PV power is 20,000 Wp when long strings are designed and fully connected with SUN2000-450W-P power optimizers. *2 The maximum input voltage is the upper limit of the DC voltage. Any higher input DC voltage would probably damage inverter.
The maximum voltage of the dc circuit to ground is +/- 250 Vdc so all modules and wiring in the PV source circuit feeding the power optimizers must be rated at least 250Vdc (typical ratings are no less than 600 Vdc).
Max. PV Power: be sure that the total number of modules are below the inverter's maximum. Max. DC Voltage: be sure that the total modules in series are below, in this case, 600 V total. MPPT operating voltage range / Start Voltage: be sure the minimum module voltage is above the operating MPPT lower range of the start voltage, whichever is higher.
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