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opinion:frater_secessus:adding_dc-dc_charging_to_solar

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opinion:frater_secessus:adding_dc-dc_charging_to_solar [2020/05/11 15:04]
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opinion:frater_secessus:adding_dc-dc_charging_to_solar [2020/05/11 15:06] (current)
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 ====== Opinion: ​ adding DC-DC charging to solar ====== ====== Opinion: ​ adding DC-DC charging to solar ======
  
-**Devil’s advocate proposition:​** ​  ​when ​combined with nontrivial amounts of solar, ​ **DC-DC charging is a decreasing return expense**. ​ Normal isolator charging would do the Bulk-style heavy lifting adequately and much more cheaply.+When combined with nontrivial amounts of solar, ​ **DC-DC charging is a decreasing return expense**. ​ Normal isolator charging would do the Bulk-style heavy lifting adequately and much more cheaply.
  
 **Reasoning:​** ​ normal isolators raise the bank to  alternator voltage (Valt, ​ something like 13.8v, maybe higher). ​ The primary value of DC-DC charging is that it DC-DC upconverts voltage to reach Vabs (Pb) or to induce top-balancing via overcharge (Li).   ​Let’s look at the cost/​benefit,​ assuming the 300Ah lead bank AGM absorps at 14.4v. **Reasoning:​** ​ normal isolators raise the bank to  alternator voltage (Valt, ​ something like 13.8v, maybe higher). ​ The primary value of DC-DC charging is that it DC-DC upconverts voltage to reach Vabs (Pb) or to induce top-balancing via overcharge (Li).   ​Let’s look at the cost/​benefit,​ assuming the 300Ah lead bank AGM absorps at 14.4v.
opinion/frater_secessus/adding_dc-dc_charging_to_solar.txt · Last modified: 2020/05/11 15:06 by frater_secessus