I find myself in battery envy...<br/><br/>This filter takes the place of a second battery ..<br/><br/> I realize the PO was very maticulas with the battery-solar calculations were done.. and perhas I'm sensitive sick I've been nursing a 10 yr old battery.. <br/><br/>Will I really use 80 ah overnite? 40% of a 250ah agm<br/><br/>