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Message: <blockquote data-quote="NEMISIS" data-source="post: 27719642" data-attributes="member: 494668">Yes, you must have AC SPD, in fact that is more important than DC SPD. you have a way less probability for getting lighting surges via pv side(you need to ground frame of the solar panels separately). but grid is susceptible for  lighting surges all the time, not only directly lightning but also induced surges as well. As i have heard, most common cases for inverter failures are,1 - Lighting2 - Accidentally connect grid supply to the inverter output, (people are directly connecting the inverter  output to a wall plug), this can avoid by using a changeover.Honestly, people went for SAKO inverters due to its price, 3KW was about 75K LKR and 5KW was about 1.20K LKR when the USD was 200. that is the main reason people went for SAKO, not due to the quality.I think Epever/MPP solar are better choices in terms of quality, especially MPP Solar. Growatt is also a better brand but it is bit expensive, Growatt inverters are popular in US/Australia/South Africa etc. and it is with a better support, so i want with growatt.You can hardly find any reviews in the internet for SAKO inverters.There are other importers who does import off grid stuff for you for a reasonable price. not cheap as the admin service but very reasonable, or else you can import an inverter by yourself no big deal.</blockquote>

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