electrical:solar:nonessential
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electrical:solar:nonessential [2023/10/18 18:56]
frater_secessus [when to run opportunity loads] |
electrical:solar:nonessential [2023/10/18 19:08] (current)
frater_secessus [when to run opportunity loads] |
| ===== when to run opportunity loads ===== | ===== when to run opportunity loads ===== |
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| **The best time to run non-essential loads is when there is surplus current** over what battery charging needs. With lead this means **during Float, or after current has started dropping off in Absorption**. There is a little more wiggle room with [[electrical:12v:deep_cycle_battery#lithium_chemistries|LiFePO4]]; the loads can be run with no net effect on the system when | The optimal time to run loads is when there is **power available in excess of battery charging requirements**. When done at the right time, the loads are effectively run [[electrical:solar:offthepanel|off the panels]] rather than off the battery bank. This results in the bank having a higher state of charge both at sundown and morning. |
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| * any time after the bank has reached the intended charge state | With **lead** this means **during Float**, or **in late Absorption** when charge current acceptance has fallen enough that the system can run the loads //and still maintain the Absorption voltage setpoint//. |
| * or any time the bank can be projected to carry the opportunity load //and still hit the intended charge state by sundown//. Exception: Lithium setups with PWM controllers solar charge controllers will make [[electrical:solar:pwm_tweaking|most power]] when bank voltage is highest. So waiting for Float or Absorption to run opportunity loads will mean the solar can make more Wh per day. | |
| | There is a little more wiggle room with [[electrical:12v:deep_cycle_battery#lithium_chemistries|LiFePO4]]; the loads can be run with no net negative effect on a Lithium system when |
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| | * the bank has reached the intended charge state; or |
| | * any time the bank can be //projected// to reach the intended charge state by sundown while carrying the extra loads. In effect, lithium allows you to "borrow" against future charging without penalty.. Exception: Lithium setups with PWM [[electrical:solar:charge_controller|solar charge controllers]] will make [[electrical:solar:pwm_tweaking|most power]] when bank voltage is highest. So waiting for Float or Absorption to run opportunity loads will mean the solar can make more Wh per day. |
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electrical/solar/nonessential.1697669780.txt.gz · Last modified: 2023/10/18 18:56 by frater_secessus
