<html><head><base href="x-msg://43/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi John,<div><br></div><div>I am curious about what you saying "float or equalization". Here's my understanding: If the battery is able to accept all current presented, the electrochemical process, SO4 combining with H released through decomposition, is balanced and with little excess gas released. When the electrolyte becomes saturated there is no more SO4 to recombine and gassing is raised significantly, the volume increasing relative to voltage. Thus, equalization charging produces the highest volume of H and O gas. However, when the voltage is lowered to float, the current is at the lowest state, about 0.2 amps/100ah capacity, decomposition at that point is practically nil.</div><div><br></div><div>Am I missing something or did you mean to say during the <u>acceptance</u> and equalization mode?</div><div><br></div><div>Larry Crutcher</div><div><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Starlight Solar Power Systems</div></div></span></span><div><br></div></span>
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<br><div><div>On Jan 6, 2012, at 9:00 AM, John DeBoever wrote:</div><br class="Apple-interchange-newline"><span class="Apple-style-span" style="border-collapse: separate; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div bgcolor="white" lang="EN-US" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: black; "><span style="color: rgb(31, 73, 125); ">Kent,<o:p></o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: black; "><span style="color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: black; "><span style="color: rgb(31, 73, 125); ">Thank you for pointing at the units. Please note that:<o:p></o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0.5in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span style="font-family: Symbol; color: rgb(31, 73, 125); "><span>·<span style="font: normal normal normal 7pt/normal 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span></span><span style="color: rgb(31, 73, 125); ">You are looking for cc/hr/Ah/cell rates at float and equalization voltages.<o:p></o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0.5in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span style="font-family: Symbol; color: rgb(31, 73, 125); "><span>·<span style="font: normal normal normal 7pt/normal 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span></span><span style="color: rgb(31, 73, 125); ">Gassing is a function of charging current (FLA: an ampere-hour of overcharge, i.e. during float or equalization mode, results in about 0.33 cc of H<sub>2</sub>O total gassing per cell)<o:p></o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0.5in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in; "><span style="font-family: Symbol; color: rgb(31, 73, 125); "><span>·<span style="font: normal normal normal 7pt/normal 'Times New Roman'; "> <span class="Apple-converted-space"> </span></span></span></span><span style="color: rgb(31, 73, 125); ">For constant voltage (float or equalization) the current is a function of temperature and stage of battery life (plus any failure modes that begin to occur toward end-of-life)<o:p></o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: black; "><span style="color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: black; "><span style="color: rgb(31, 73, 125); ">I’ll work up a response after a series of meetings.<o:p></o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: black; "><span style="color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: black; "><span style="color: rgb(31, 73, 125); ">John<o:p></o:p></span></div><div style="font-weight: normal; margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; color: black; "><span style="color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div></div></div><br></div></span></div><br></div></body></html>