{"product_id":"1760559843-3f67c02d","title":"ARCO Zeus A4000-24V Low Turn On (LTO) High Output Alternator - Isolated Ground","description":"\u003cp\u003eIf Optimal Charging at Low Speed is Important to You, This is the Perfect Alternator for You\u003cbr\u003e\u003cbr\u003eHigh Output \/ High Amperage Alternator: The Highest Power Output in Its Class\u003cbr\u003eNote: If fast idle charging is important to you, view our ARCO Zeus 24V 7kW High Amperage Alternator here.\u003cbr\u003e24V Advantage - Low Turn On (LTO)\u003cbr\u003eThe ARCO Zeus A4000-24V LTO alternator turns on at lower RPMs, runs cooler and provides more power than older designs that are larger and heavier. This alternator continuously generates over 1.4kW (51 Amps) at just under 1,500 RPM, and almost 2.4kW (87 Amps) at 2,000 Alternator RPM. Put in real world terms, a marine diesel engine idling at 750 RPM with a 2:1 pulley ratio is generating over 1.5kW (55 Amps), and a Mercedes Sprinter at 750 RPM with a 3.21:1 ratio is generating over 2.5kW (91 Amps)!\u003cbr\u003eBest-in-Class Performance\u003cbr\u003eThe ARCO Zeus A4000-24V alternator turns on at lower RPMs, runs cooler and provides more power than older designs that are larger and heavier. The newest generation of 24V performance has arrived.\u003cbr\u003eTrue 24V Alternators\u003cbr\u003eCompetitor’s 24V alternators utilize a 12V rotor and field current which is less efficient and limits output at all RPMs. ARCO utilizes a native 24V rotor and field current. This results in our 24V alternator running cooler than competitor’s 24V alternators, having a direct impact on alternator lifespan.\u003cbr\u003eARCO Zeus 24V High Amperage Alternators, A4000-24V LTO or A7000-24V: Which One's Right for You?\u003cbr\u003eChoose A4000-24V LTO if:\u003cbr\u003e\u003cbr\u003eYou prioritize charging at idle (at campsite or anchor)\u003cbr\u003eYou need to limit power take-off i.e. smaller engine\u003cbr\u003eYou are willing to trade some top-end output for increased outputat low RPMs\u003cbr\u003e\u003cbr\u003e*On the power curve graph, select A4000-24V LTO for use cases left of the Decision Point; otherwise, select A7000-24V.\u003cbr\u003eHere’s a concise comparison of the DF315, DF4, and SF12 ARCO Zeus alternator mounting configurations:\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eMount Code\u003cbr\u003eMount Type\u003cbr\u003eFoot Style\u003cbr\u003eFoot Spacing\u003cbr\u003eCommon Use\u003cbr\u003eNotes\u003cbr\u003e\u003cbr\u003eDF315\u003cbr\u003eDual Foot (Yanmar-style)\u003cbr\u003eDual\u003cbr\u003e3.15 inches (80 mm)\u003cbr\u003eYanmar marine engines\u003cbr\u003eStable, compact mount for tight bays\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eDF4\u003cbr\u003eDual Foot (J180-style)\u003cbr\u003eDual\u003cbr\u003e4 inches\u003cbr\u003eHeavy-duty marine and industrial engines\u003cbr\u003eRigid, robust mounting\u003cbr\u003e\u003cbr\u003eSF12\u003cbr\u003eSingle Foot (Universal, Delco Style)\u003cbr\u003eSingle\u003cbr\u003e1\" or 2\" (adjustable)\u003cbr\u003eFlexible marine\/automotive applications\u003cbr\u003eAdapter allows fit to multiple brackets\u003cbr\u003e\u003cbr\u003eDF315 is ideal for Yanmar-style brackets.\u003cbr\u003eDF315R is ideal for Yanmar-style brackets. R = Rear Battery Post \u003cbr\u003eDF4 is suited for larger, more robust engine frames.\u003cbr\u003eSF12 offers the most flexibility and is often used in retrofits or tight spaces.\u003cbr\u003e\u003c\/p\u003e","brand":"ARCO","offers":[{"title":"DDF4","offer_id":41789824008277,"sku":"4403","price":1829.8,"currency_code":"USD","in_stock":false},{"title":"DF315","offer_id":41789824041045,"sku":"4401","price":1829.8,"currency_code":"USD","in_stock":false},{"title":"DF315R","offer_id":41789824073813,"sku":"4402","price":1829.8,"currency_code":"USD","in_stock":false},{"title":"SF12","offer_id":41789824106581,"sku":"4405","price":1829.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0599\/3614\/5493\/files\/4020-275_6c4b3f07-6a69-4816-bfae-26a95be93bc1.webp?v=1761972424","url":"https:\/\/www.pypermarine.com\/products\/1760559843-3f67c02d","provider":"Pyper Marine","version":"1.0","type":"link"}