300ah lithium batterybyd lifepo4 cells12v lithium batterysolar quotes growattsoldering lifepo4 cellsvictron inverter 2000wlalela inverterZ28rcG93ZX2kv invertercatl 3.2v 280ah lifepo4 batterybig solarbatterie 12v 280ah wohnmobil versorgung mover boot batterie statt 230ahcharger lithium titanate battery