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Actual Power Requirement
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<blockquote data-quote="David B" data-source="post: 515144" data-attributes="member: 33930"><p>Thanks for your thoughts Guys - I think you are misunderstanding my question.</p><p></p><p>The background is that I have a mobility scooter, the onboard batteries being charged by a 240v charger when I am at home.</p><p></p><p>My problem doesn't not relate to the charging of the batteries when I can attach the charger to a 240v socket.</p><p></p><p>My car has a hoist so I can carry the scooter in the back.</p><p></p><p>What I want do do is use the 240v charger to charge the scooter batteries when I am driving.</p><p></p><p>I therefore want to buy a 12v to 240v pure sine wave inverter to power the charger - but what capacity inverter do I need?</p><p></p><p>My quandary is that following Ohms Law V x A =W the wattage of my battery charger should be 268.8 but the shown value according to my power meter shows 161watts. </p><p></p><p>The figures I quote were what my power meter was showing while charging the battery so actual figures.</p><p></p><p>If I want to buy an inverter of, say. double the wattage required to be on the safe side, should I but one that can provide at least 322watts as per my power meter reading or one that can provide at least 535watts if I apply Ohms Law V x A =W?</p></blockquote><p></p>
[QUOTE="David B, post: 515144, member: 33930"] Thanks for your thoughts Guys - I think you are misunderstanding my question. The background is that I have a mobility scooter, the onboard batteries being charged by a 240v charger when I am at home. My problem doesn't not relate to the charging of the batteries when I can attach the charger to a 240v socket. My car has a hoist so I can carry the scooter in the back. What I want do do is use the 240v charger to charge the scooter batteries when I am driving. I therefore want to buy a 12v to 240v pure sine wave inverter to power the charger - but what capacity inverter do I need? My quandary is that following Ohms Law V x A =W the wattage of my battery charger should be 268.8 but the shown value according to my power meter shows 161watts. The figures I quote were what my power meter was showing while charging the battery so actual figures. If I want to buy an inverter of, say. double the wattage required to be on the safe side, should I but one that can provide at least 322watts as per my power meter reading or one that can provide at least 535watts if I apply Ohms Law V x A =W? [/QUOTE]
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