onsumes **29,000**Wh of power per day.
- A 100w solar panel on an MPPT [[electrical:solar:charge_controller|controller]] will harvest an average of:
* Chi... ter kettles
* electric space heaters
* [[hvac:solar_ac|air conditioners]]
* electric coffee makers
... nvested thousands of dollars in battery banks and solar, or run a [[electrical:generator|generator]]
Ele
ectricity in summer." -- timselectric((https://diysolarforum.com/threads/less-than-perfect-off-grid-syste... e Big Picture ======
There are many [[electrical:solar:sizing#calculators|calculators where you can plug... hoices affect what you will need.
See [[opinion:solar:sizing.walkthrough|this article]] for a sample wa... e numbers.
===== overall economics =====
Since solar is dependent on local conditions one has to size
gh for sizing an imaginary system. See [[opinion:solar:sizing|this article]] for the Big Picture.
[[lif... s to make more power.” – highdesertranger
====== Solar sizing walkthrough ======
This article will show... he math required to estimate the size of off-grid solar setup required to run specified loads. To get a ... .
But running household appliances((120vac)) off solar((or batteries)) will incur //inverter losses//.
ers ======
The EpEver line of MPPT [[electrical:solar:charge_controller|solar charge controllers]] is an excellent value-for-money for some use cases. They c... * the controllers can take massive [[electrical:solar:overpaneling|overpaneling]]; the smaller units (... riods of no load - see [[https://www.reddit.com/r/SolarDIY/comments/ttxs1b/switched_to_lifepo4_some_quest
Note: this is a streamlining of [[electrical:solar:shallow_cycling|the shallow cycling article]].
======... be done for about $25, or about $100 with 100w of solar if one shops around.
===== the controller =... ystem is an inexpensive single-stage [[electrical:solar:charge_controller|solar charge controller]].((sometimes called a "shunt" controller)) No, solar is not
brightly every day." -- Cariboocoot((http://forum.solar-electric.com/discussion/comment/250894#Comment_250894))
====== Solar panel sizing for different geographical areas ===... nd meteorological conditions affect the amount of solar wattage one needs.
**Reminder:** available sunlight ([[electrical:solar:output#insolation|insolation]]) is expressed in H
akes#heating_and_cooling|heat and cool stuff with solar power]].
* avoid flexible solar panels, AGM batteries, and solar generators. They are all niche products with niche (ie, doubled) pri... device.\
* run discretionary loads [[electrical:solar:nonessential|when you have excess power]]
====
low //float voltages//((≤13.4v)), or [[electrical:solar:status#setups_with_no_float|no float at all]]
... cal:12v:b2b|DC-DC]] is present
* [[electrical:solar:charge_controller|solar charging]] (profiles, configurability, output rating, protections if any)
*... ical change from lead-battery charging.
===== solar charging =====
Here we need to be careful about
aren't trying to run the household
- disconnect solar panels, if solar is present, for the reasons given [[electrical:solar:charge_controller#connection_order|here]].
- appl... an none in this scenario - see below
- when any solar charge controller comes back online((normal LEDS,
ne but you don't know it. Example: "[[electrical:solar:status#setups_with_no_float|my charger isn't char... ltage, float voltage, charging amps, etc))
==== solar panels ====
[[electrical:solar:panels|Solar panels]] are usually pretty obvious if you have them. They may be mounted on a rack, adhere
DRAFT
FIXME
====== How much extra solar power do I have? ======
Yes, we can use [[electrical:12v:batt... attery bank. And we can look at the [[electrical:solar:charge_controller|solar charge controller]] to see how much power it is making.
But how can we tell **how much untapped power does our solar have in reserve?** Put another way: how much mor
====== Opinion: adding DC-DC charging to solar ======
When combined with nontrivial amounts of solar, **DC-DC charging is a decreasing return expense... d to fully charge Li has already been provided. Solar would have to lug voltage up 13.8v -> 14.4v for A... g battery voltage right up to Vabs (14.4v).
* Solar would just handle the high voltage, decreasing cu
====== My solar isn't charging ======
Reminder: a [[electrical:solar:charge_controller|solar charge controller]] makes power
- //when power is demanded// for [[electrical... t receiving full sunlight =====
* [[electrical:solar:shading|partial shade]] is a killer
* raincloud
====== Solar charging stall at alternator voltage ======
Consider the following scenario:
* 100w of panel that charges at 75W
* [[electrical:solar:charge_controller|solar charge controller]] [[electrical:solar:charge_controller_setpoints|Vabs]] set to 14.6v
* alternator vo
ms of protection: BMS low temp charging shutoff, solar or DC-DC low temp charging cutoff, etc.(("belt an... a wash =====
With "soft" charging like a small solar setup it's a wash. a matter of preference and co...
With robust charging (alternator and/or bigger solar) there can be charging opportunities lost with se...
Note from Secessus: "since reading [[https://diysolarforum.com/threads/why-you-cannot-charge-lifepo4-be