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--- electrical:solar:gentle_intro [2020/04/13 21:49]
frater_secessus [the easy answer]
+++ electrical:solar:gentle_intro [2020/04/13 21:52]
frater_secessus [AC, DC, Amps, and Watts]
@@ Line 64: / Line 64: @@
 The details of Bill's logic and math has been [[electrical:solar:daily-gentle|moved to its own page]], but for now we will stipulate he came up with a daily requirement of **91Ah** of usable battery capacity for each 24hr period.  On average he will consume that much power each day, and will have to replace that amount((and a little bit more due to charging inefficiencies)) from the sun.
-**A peak ahead:** for reasons that will be explained later, this requirement means he will need about 200Ah of lead battery (flooded or AGM)((or 100Ah of lithium)), and 200w+ of solar panel, depending on [[opinion:frater_secessus:panelsizesforinsolation|where the camper will be used]].  [[electrical:12v:alt_and_solar|Adding]] in [[electrical:12v:alternator|alternator charging]] will reduce solar panel requirement somewhat.
+**A peak ahead:** for reasons that will be explained later, this requirement means he will need about 200Ah of lead battery (flooded or AGM)((or 100Ah of lithium)), and 200w+ of solar panel, depending on [[opinion:frater_secessus:panelsizesforinsolation|where the camper will be used]].
@@ Line 80: / Line 80: @@
   * [[http://amzn.to/2zrtTR5|200W kit w/MPPT controller]] + 2 x 6v golf cart batteries (200Ah+) is about $675 at late 2017 prices.  This is about $2.37 per solar watt, and would cost **$675 over 5 years**.((using a locally sourced 24v panel with the MPPT controller would bring the cost down to $1.25/solar watt))
   * 200W kit w/MPPT controller + [[electrical:12v:deep_cycle_battery#agm|AGM battery]] (200Ah+) bank is about $875 at late 2017 prices.  This is about $2.37 per solar watt, and would cost **$965 over 5 years**~.  Note: AGM batteries are not particularly well suited for solar-only charging.((http://www.cheaprvliving.com/forums/Thread-How-much-of-an-issue-is-battery-off-gassing?pid=144704#pid144704))
-  *   * 200W kit((no MPPT required)) + drop-in lithium bank 100Ah((roughly equivalent to 200Ah of lead)) is about $1350 at late 2017 prices. This is about $1.75 per solar watt, and would cost **$1350 over 5 years**.  //But// with proper treatment LiFePO4 batteries can last up to 10 years, **bringing the 5 year cost down to $675**.
+  *   * 200W kit((no MPPT required)) + drop-in lithium bank 100Ah((roughly equivalent to 200Ah of lead)) is about $1350 at late 2017 prices. This is about $1.75 per solar watt, and would cost **$1350 over 5 years**.  //But// with proper treatment LiFePO4 batteries can last up to 10 years, **bringing the 5 year cost down to $675** if one sticks with it that long and treats the battery well.

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