voltage to specific charging voltage [[electrical:solar:charge_controller_setpoints|setpoints]] and limit... ion as it might seem since lead-acid [[electrical:solar:status#in_absorption|current acceptance drops sub... ach day.)) This is where [[electrical:12v:alt_and_solar|a bit of solar helps with the long-duration duties]].
DC-DC chargers are often triggered by the IGN cir
fair amount of the bulk charging done and let the solar finish it off the rest of the day. -- jimindenver... ]] batteries healthy, so [[electrical:12v:alt_and_solar|combining with solar]] is common
[[opinion:frater_secessus:pareto|about these summaries]]
===== overvi... eply discharged
* when [[electrical:12v:alt and solar|combined with solar]] or some other higher-voltag
|DIY LiFePO4 Battery Banks subforum]] over on DIY Solar. You can also see the [[electrical:12v:lifepo4_b... al heaters.
The [[https://diysolarforum.com/|DIY Solar Forums]] are a good place to check for updated in... hought)) Upsides include:
* greater [[opinion:solar:sizing.walkthrough#days_of_autonomy|autonomy]] when charging is absent or limited due to poor solar conditions
* supporting larger discharge curren
nsive (and maybe impossible) get Big Current with solar alone and difficult (or even impossible) to compl... on alternator alone. But [[electrical:12v:alt_and_solar|small amounts of both combine]] to make a workabl... expensive charging system.
For this reason the solar + alternator combination is the most common and e... rnator-only charging** [[electrical:12v:mandatory_solar|can work with lithium banks]] but for technical r
voltage is rarely useful in the field since:
- solar charging alone is rarely able to hit charge curre... s.((https://www.solarpaneltalk.com/forum/off-grid-solar/batteries-energy-storage/14996-trojan-t-105-vs-cr... stilled water occasionally.
Common [[electrical:solar:charge_controller_setpoints|setpoints]] (check yo... g current** than flooded, and it may be more than solar-only setups can provide.((http://www.cheaprvlivin
concurrent charging source]] for an alternator is solar.
**Example**: Let's assume the same 14.0v alternator output and solar contribution that pushes up Vbatt by 0.3V
* I=... v-**13.0v**)/0.020mR = 1.0v/0.020mR = 50A without solar
* I=V/R = (14v-**13.3v**)/0.020mR = 0.7v/0.020mR = 35A with solar
Note: this occurs because alternators are volta
shunt cannot be counted.**
Note: [[electrical:solar:status|Watching amps trail off]] at the end of le... to the app or directly to other Victron gear like solar charge controllers.((the Orion-TR is a notable an... d operate their [[https://amzn.to/2SuOYmr|SX-2030 solar charge controller]]. The monitor will still prov