Solar w/ battery to keep the stove lit.

Just a small amount of shade on a solar panel can affect its power output. Your solar panel cells are connected in a series string, meaning that any cell that’s affected by shade can weaken the other cell panels, reducing the overall power level. Before you go solar, you’ll want to check that you have an area for your solar panel with minimal or no shading (recommended), or use a string inverter with MPPT (maximum power point tracking) to minimize output loses associated with partial shading.

Found this. Hooty, do you have a string inverter?

waytomany?s wrote: ↑

Wed. Jun. 26, 2024 7:15 pm

Just a small amount of shade on a solar panel can affect its power output. Your solar panel cells are connected in a series string, meaning that any cell that’s affected by shade can weaken the other cell panels, reducing the overall power level. Before you go solar, you’ll want to check that you have an area for your solar panel with minimal or no shading (recommended), or use a string inverter with MPPT (maximum power point tracking) to minimize output loses associated with partial shading.

Found this. Hooty, do you have a string inverter?

I do not think that is correct.

waytomany?s wrote: ↑

Mon. Jun. 24, 2024 12:14 pm

I'm interested in this part as an ease myself into it type of thing. Any personal preferences as to product or how you may have set things up differently?

I am extremely interested in your project.
Please start a thread and show us what you do and how you do it.
As you know I am interested in inexpensive battery backup!
Thanks! I look forward to seeing your progress.

ColdHouse wrote: ↑

Thu. Jun. 27, 2024 6:58 am

I do not think that is correct.

Sun Hours Map: How Many Sun Hours Do You Get?
https://unboundsolar.com/solar-information/sun-hours-us-map

Probably propaganda.

If you have an microinverter on every panel shade does not affect the total output..

You convert the DC at the panel to AC and send it to the service...

On the other hand the strings all feed an inverter in series so if one panel is

shaded the series goes to the lowest output of the low panel...



BigBarney

BigBarney wrote: ↑

Thu. Jun. 27, 2024 12:01 pm

If you have an microinverter on every panel shade does not affect the total output..

You convert the DC at the panel to AC and send it to the service...

On the other hand the strings all feed an inverter in series so if one panel is

shaded the series goes to the lowest output of the low panel...



BigBarney

I have micro inverters so I don't have an issue with shaded panels. For those that don't want microinverters there are DC optimizeres that do the same thing. Shade on one panel no longer has to affect the entire array.

waytomany?s wrote: ↑

Mon. Jun. 24, 2024 12:14 pm

I'm interested in this part as an ease myself into it type of thing. Any personal preferences as to product or how you may have set things up differently?

Sorry I'm not checking in as frequently.
About the only thing I would do differently is buy the battery cells by the pallet direct from china, cutting out the middle man.

Essentially you buy an inverter / aio unit that allows timed charging / discharging and set it up to draw from battery when rates are high and recharge when rates are low. Size the battery bank large enough to cover your loads during peak rates.

I started another thread for my next expansion (remember I said it's an addiction... ), if you search SRNE ASP parallel on the other forum I'm sure you'll find it.

waytomany?s wrote: ↑

Wed. Jun. 26, 2024 7:15 pm

Just a small amount of shade on a solar panel can affect its power output. Your solar panel cells are connected in a series string, meaning that any cell that’s affected by shade can weaken the other cell panels, reducing the overall power level. Before you go solar, you’ll want to check that you have an area for your solar panel with minimal or no shading (recommended), or use a string inverter with MPPT (maximum power point tracking) to minimize output loses associated with partial shading.

Found this. Hooty, do you have a string inverter?

Yes, I have string inverters with multiple MPPTs. My array voltages are anywhere from ~240 - 360 VOC.

Shading can and will affect panels, half cut cells, bypass diodes and other things can help with this.
Fortunately I have unobstructed views for my strings.
Imo optimizers add cost and complexity as well as additional failure points, but they will help in heavy shading situations.

waytomany?s wrote: ↑

Thu. Jun. 27, 2024 7:24 am

Sun Hours Map: How Many Sun Hours Do You Get?
https://unboundsolar.com/solar-information/sun-hours-us-map

Probably propaganda.

That appears to be somewhat accurate for winter. Check out suncalc.org for a great visual and hours.

I think I made the decision to get the battery to fill in during the peak

rates in winter when I need more heat...Hopefully with a heat pump...

Especially one at 500% efficiency... Probably with propane refrigerant in a monoblock...

Hootyburra:
"Essentially you buy an inverter / aio unit that allows timed charging / discharging and set it up to draw from battery when rates are high and recharge when rates are low. Size the battery bank large enough to cover your loads during peak rates."

Use the off peak electric to charge up .... ~5 cents a Kwh off peak...

A hybrid inverter can also do solar so that may be added later...

Bigbarney

BigBarney wrote: ↑

Fri. Jul. 05, 2024 1:07 pm

I think I made the decision to get the battery to fill in during the peak

rates in winter when I need more heat...Hopefully with a heat pump...

Especially one at 500% efficiency... Probably with propane refrigerant in a monoblock...

Hootyburra:
"Essentially you buy an inverter / aio unit that allows timed charging / discharging and set it up to draw from battery when rates are high and recharge when rates are low. Size the battery bank large enough to cover your loads during peak rates."

Use the off peak electric to charge up .... ~5 cents a Kwh off peak...

A hybrid inverter can also do solar so that may be added later...

Bigbarney

I am sure you know what is best.
I think you can charge your Tesla's at whatever time you designate.
In my opinion the cars would never need to be charged during peak hours.

That would leave the only consideration to what specifically needs electricity during peak hours.
How may kWh must you purchase at the peak rate?

Take that number of kWh and multiply by $0.05 and figure out how long it will take to pay for your battery.

My guess is that your battery will need replacing before it has paid for itself.

As mentioned earlier some things can be put on a timer to not come on during peak hours.

In CT, peak hours are weekdays between 3pm and 9pm. That would be easy for me to avoid. A person could choose to overheat their home or overcool their home with their heat pump during off peak hours and have it shut off for that 6 hour span.

Have you had many things that actually pay for themselves?

My peak hours are from 7am to 11pm every day...

So l have to store enough power for 16 hours...

So I will charge the battery at night and then use the heat

pump to either cool or heat during the peak hours...

So the power at ~5 cents and get a COP of 4 , then the

cost is 1.25 cents per Kwh of energy....

Maybe add some solar to help in the peak hours...

BigBarney

BigBarney wrote: ↑

Mon. Jul. 08, 2024 9:40 am

Have you had many things that actually pay for themselves?

My peak hours are from 7am to 11pm every day...

So l have to store enough power for 16 hours...

So I will charge the battery at night and then use the heat

pump to either cool or heat during the peak hours...

So the power at ~5 cents and get a COP of 4 , then the

cost is 1.25 cents per Kwh of energy....

Maybe add some solar to help in the peak hours...

BigBarney

It is your money to do with as you please.
I thought your goal was to save money.

I don't understand why you would want to purchase thousands of dollars of batteries if using them will not save you money.

Maybe I missed something. If the batteries cost more than the savings from purchasing off peak, and the batteries won't pay for themselves, I don't understand your objective.

Good luck! Keep us posted. I am curious what you are doing and what the outcome will be.

I guess a consideration would be having chargers that can charge your batteries to your desired capacity in that 8 hour timeframe.

At my age we don't need to save anymore...That was all in the past...

Now in spend down mode ... Take care of the hobbies you like...

Do anything you want and enjoy life...

BigBarney