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electrical:12v:voltage_sag [2022/03/16 13:14] frater_secessus [beef up the circuit] |
electrical:12v:voltage_sag [2022/03/16 14:00] frater_secessus [voltage sense wire] |
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- | Extreme example: | + | Extreme example: |
+ | Sag presents special challenges when charging [[electrical: | ||
===== approaches ===== | ===== approaches ===== | ||
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==== do nothing ==== | ==== do nothing ==== | ||
- | This is the majority position since most are unaware of the issue, or don't judge it to be important. | + | This is the majority position since most are unaware of the issue, or don't judge it to be important. |
+ | - solar-only charging is often low-current charging, minimizing charge-induced sag | ||
+ | - lead-chemistry batteries often have a range of Absorption and Float [[electrical: | ||
+ | ==== shorten the circuit ==== | ||
+ | |||
+ | All other things being equal, a **shorter wiring run will have less sag** than a longer run. For this reason charging sources are mounted **as close to the battery bank as possible**. | ||
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+ | ==== beef up the circuit ==== | ||
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+ | Once the length of the circuit is established voltage drop along the circuit can be minimized: | ||
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+ | * run bigger wires to minimize sag - see [[https:// | ||
+ | * minimize the number of connections/ | ||
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==== voltage sense wire ==== | ==== voltage sense wire ==== | ||
- | use a separate | + | A voltage sense wire is a separate |
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+ | Since the circuit isn't carrying | ||
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+ | Example: | ||
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+ | Some sense " | ||
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+ | ==== networked shunt ==== | ||
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+ | Some controllers use networked [[electrical: | ||
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+ | Example: | ||
- | networked shunt | ||
- | use a controller that talks to a shunt at the battery | ||