Integrated vs additional PV lightning SPD (surge protection)?
The specification sheet for the 5K/8K hybrid parity (super) inverter states "PV Input Lightning Protection": "Integrated", but supplies no further details about the SPD.
What is the PV DC SPD specification, e.g. SPD info such as?:
SPD type according to EN 50539-11? Type 2? Type 1?
Lightning impulse current (10/350 µs) [DC+ -> PE/DC- -> PE] (I imp)
Voltage protection level [(DC+/DC-) -> PE] (UP)
Is it recommended to still add seperate lighting surge protector devices on the PV DC input before the inverter, e.g. Dehn Combo CL1+2 SPDs? (https://www.dehn-international.com/store/p/en-DE/F404725/dehncombo), or is this adding unnecessary cost? I ask because Johannesburg is a high intensity lighting region.
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Above is our internal Document on Sunsynk protection devices, you can use similar specifications. it recommended to still add separate lighting surge protector devices on the PV DC