@JakeShaw96 Cairngorms is genuinely one of the hardest environments to learn battery sizing in — you've got low winter irradiance, temperatures that will absolutely hammer lead-acid capacity, and...
Yeah, had exactly this with mine last winter. Worth checking your panel VOC against what the controller's actually seeing in those conditions — diffuse light can drop your array voltage...
Really solid setup @Ozzy. One thing worth mentioning if you haven't already sorted it - make sure your grid input current limit is properly configured in VE.Configure, especially with second-hand...
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