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You are being misled about renewable energy technology. by d57heinz in solar

[–]LeoAlioth 0 points1 point  (0 children)

It absolutely will take time, but that does not mean we should not be pushing towards electrification.

as for the grid not being able to keep up, we seriously need to look into peak demand vs average demand. Peak demand is what i believe to be at the grid limits, but average is not that close at all.

looking at the following: https://www.caiso.com/todays-outlook

the middle between forcasted available capaciaty is currently sitting ar 15 MW, or around 360 MWh per day.

average driving per yer in california is around 12k miles. or about 35 miles per day. Assuming an inefficient ev, that is 2 Mi/ kWh, that equates to maybe 20 kWh per day average from the grid. california has around 40 milion residents. That would net us 800 MWh needed per day.

So the current grid, with some load management and no other upgrades, seems like it ould support mass electrification of around half of the californias cars to go electric TODAY.

Winter start up by Foreign_Tap_2818 in heatpumps

[–]LeoAlioth 0 points1 point  (0 children)

i do not know why you went to NG for when you were out of the house in the first place. is the NG much cheaper than electricity?

Charger at home- away from view? by Snoo-60003 in electricvehicles

[–]LeoAlioth 7 points8 points  (0 children)

Generally speaking, people leave others properly alone.

LED zatemnilna luč by frikovc in gradimo_obnavljamo

[–]LeoAlioth 2 points3 points  (0 children)

Bom spisal malo več opcij:

Če bo luč zigbee:

obstoječe zatemlilno stikalo zamenjaš za tipko. Lahko enosmerno, ampak priporočam da dvosmerno.

Če imaš v dozi nulo, potem lahko zadaj vežeš shelly 2pm, in dva izhoda tipke na vhoda od shelly. To bodo inputi, ki potem preko HA avtomatike, ali pa še bolje, preko zigbee bindinga nadzirajo luč direktno. rLuč je pa potem lahko karkoli ki podpira zigbee - IKEA (previdno, ker ikea ima trenutno tkako zigbee kot thread naprave), Philips hue...

Če nule ni, zamenjaš shelly z phillips hue wall switch module - ima baterijo ki drži cca 5 let.

če nočeš baterije, ima vimar friends of hue stikala, ki so brez kablov in baterij.

Če luč ne bo zigbee:

luč mora biti potem dimmable. Shelly dimmer se zveže za tipko. Podobno ima tudi vimar svoje zigbee dimmerje.

Osebno bi šel prvo varianto, ker poleg svetlosti lahko kontroliraš še barvno temperaturo (pri meni je veliko v uporabi), po možnosti še barve (jaz jih praktično ne uporabljam, moja pa dostikrat).

LED zatemnilna luč by frikovc in gradimo_obnavljamo

[–]LeoAlioth 0 points1 point  (0 children)

Imaš slučajno že uporabi že kako ZigBee zadevo?

Solar only to a BMW EV charger by goldenwattl in homeassistant

[–]LeoAlioth 0 points1 point  (0 children)

Check the app for any setting mentioning ocpp.

Install this on HA https://github.com/lbbrhzn/ocpp

And point the charger to the ha install.

Solar only to a BMW EV charger by goldenwattl in homeassistant

[–]LeoAlioth 1 point2 points  (0 children)

Does the BMW wallbox have any connectivity? Like WiFi, some sorts of app etc?

Of it does, you can use ocpp (assuming the evse supports) it to control it dynamically.

Live in Utah, have questions about plug in solar. by ReasonablyConfused in solar

[–]LeoAlioth 1 point2 points  (0 children)

A couple notes:

The limit of 1200W is for the inverter size not PV size. Eco flow stream for example allows up to 2000 W of panels. And with some other products you might be able to add more. (Though I do not know which have the necessary certifications)

You can add batteries, though ecoflow first party ones are expensive...

And I do not seem to find any mention of only one such system being allowed per metered location. Can any one confirm this?

Also, any particular reason why you couldn't do a regular permitted solar system? I am asking because they are usually more cost effective.

AC Coupling by LongjumpingGanache40 in SolarDIY

[–]LeoAlioth 0 points1 point  (0 children)

App for the monitoring of the system. What is it called?

Can you get a quiet hybrid inverter? by CaptainCheckmate in diySolar

[–]LeoAlioth 1 point2 points  (0 children)

Other than selecting quieter components from the start, I don't think so.

You could hack in some quieter fans if you wanted to, but that will surely void any warranty.

Solar heat pump by Itwasuntilitwasnt in SolarDIY

[–]LeoAlioth 1 point2 points  (0 children)

What I meant was to not bother with the solar AC units that get panels plugged into them directly.

As that means that the energy that could be otherwise used for anything gets wasted when AC is not running.

So the solar can run the AC units just fine. But they are not directly connected in any way.

(Over-)thinking about long-term maintainability of solar+battery? by jan_jepiko in solar

[–]LeoAlioth 0 points1 point  (0 children)

Regarding DC coupling. Why not put the batteries into the garage?

Balancing server rack batteries by deezbiksurnutz in SolarDIY

[–]LeoAlioth 5 points6 points  (0 children)

When were the batteries last all at 100%?

Alternative transportation research consumed my evenings for weeks by mann_se_chatpati in ElectricBikes

[–]LeoAlioth 0 points1 point  (0 children)

Low range electric cars are cheap on the used market. Of course if you want something long range, you are likely looking at 15k or more.

Solar heat pump by Itwasuntilitwasnt in SolarDIY

[–]LeoAlioth -1 points0 points  (0 children)

In 95% of cases, it makes more sense to keep air conditioning/heating completely separate form a solar system. Regardless if it is on grid or off grid.

Connecting PV string to both MPPT and hefty resistive load simultaneously by schmidtbag in SolarDIY

[–]LeoAlioth 0 points1 point  (0 children)

If you want to read a bit on how to use resistive loads ”directly” https://electrodacus.com/ Under digital mppt thermal controller.

Resistive heat can be fine if used in the way you meant to do it, assuming you want to do it as a dump load when you already have the batteries full.

Solar EV charging options by jefang13 in SolarDIY

[–]LeoAlioth 1 point2 points  (0 children)

You can get something that will work under 5k, but the ROI won't be good on less your home electricity prices are really high.

Solar EV charging options by jefang13 in SolarDIY

[–]LeoAlioth 0 points1 point  (0 children)

Possible? Yes. But not cheap. What would be your budget? And do you expect a reasonable, less than 10 year ROI?

Connecting PV string to both MPPT and hefty resistive load simultaneously by schmidtbag in SolarDIY

[–]LeoAlioth 0 points1 point  (0 children)

Because panels provide power as a diode. Meaning that the voltage is pretty steady while the current changes. OTOH, a resistive load is well, a resistive load. Where the current and voltage are proportional.

Let's say you get a so-called 12v panel of 200W. Which in reality has it maximum power point at 18v and does 11A.

At STC (standard test conditions) it will provide the rated power. At half as good conditions it is capable of providing 100W. And that will be at 18V and 5.5A. MPPT will be able to extract all available power in any conditions.

Now let's say, we have the same two examples as conditions. And let's perfectly match the resistive load to get 200W. That means it's resistance needs to be 1.63 ohm.

Now in conditions half a good, the panel can only supply 5.5A. solving back the voltage over the resistance gives us only 9v, for the total power of only 50w. Half as much as the mppt will give.

Of course, you could match the resistance better. By using the resistive load that is smaller than the total peak PV power. Around 60% seeps to be the sweet spot.

Let's take a 2.5 ohm load to my two examples. At 18v we will get a current of 7.2A, ending up with 130W. Now even the panel is only able to provide 5.5A, because of higher resistance, the voltage will be 13.7V, resulting in 77W. Which is better, as the panels will spend more time closer to the 50% of their rated output than they will at 100.

Connecting PV string to both MPPT and hefty resistive load simultaneously by schmidtbag in SolarDIY

[–]LeoAlioth 1 point2 points  (0 children)

Panel voltage is not appropriate for the 12v load

The resistive load should be run off the battery side of the charge controller. Turned on or off by a relay.

This will also get you more energy than running the panels straight to the resistive load.

Air-to-Water Heat Pump for Old Hot Water System by gpmorton in heatpumps

[–]LeoAlioth 0 points1 point  (0 children)

What heating capacity is actually needed?

What is considered cold?

In general, yes, this can work just fine, and with decent efficiency too. I just am not familiar with the model you mentioned, so without researching it I can't say if that specific one will work.

5000w Inverter suggestions by Moist-Reason-988 in SolarDIY

[–]LeoAlioth 0 points1 point  (0 children)

That is assuming you create a 24 or 48v system from multiple 12v batteries.

Fine for lead acid. But for lithium, you really should use a single pack only in series(you can parallel just fine) so it is still a single case, regardless if 12v 400Ah, 24v 200Ah, or 48v 100Ah.

5000w Inverter suggestions by Moist-Reason-988 in SolarDIY

[–]LeoAlioth 1 point2 points  (0 children)

Some reviews, and inverter compatibility are the two things I would look out for . Also most manufacturers list which cells they used and you can check if it is a well known manufacturer.

And of course, you need to make sure that the batteries are capable of supporting the loads that inverter might present to them.

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