西班牙采购需求：服务器机架电池，一体化ESS电池，服务器电池机架，服务器电池机架，可移动ESS电池，机架电池

I'm looking for high-quality batteries at competitive prices for my business based in Pozuelo de Alarcon, Madrid. As a reseller in the residential off-grid sector, I target the Mounts & Wiring marketplace and anticipate selling 10-50 units each month. I prefer a quarterly fulfillment option (no drop-shipping) and expect not only reasonable margins but also excellent product quality. Additionally, technical support for power system design would be greatly appreciated as it's crucial for my operations. Looking forward to your response!