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Actually, thanks in part to this forum, I was able to find 2 “new old stock” positive ground inverters manufactured by SMA under the Sunny Boy name. I was able to successfully swap out my SunPower SPR-4000m’s for SB-4000US inverters. “New Old Stock” means new in the box, never opened, but manufactured, as in this case, in 2012. The system is humming once again.Comment
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Actually, thanks in part to this forum, I was able to find 2 “new old stock” positive ground inverters manufactured by SMA under the Sunny Boy name. I was able to successfully swap out my SunPower SPR-4000m’s for SB-4000US inverters. “New Old Stock” means new in the box, never opened, but manufactured, as in this case, in 2012. The system is humming once again.5.775 kW System: 21 SolarWorld SW275 x 1 SMA 5000Comment
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