Used Model S battery ($1500) for use storing solar from panels on manufactured home ($?). If you drove an efficient BEV with a small battery you could charge at night. House uses only electric but has efficient appliances and heat pump. I wonder how big of a battery you’d need to get through winter

Used Model S battery ($1500) for use storing solar from panels on manufactured home ($?). If you drove an efficient BEV with a small battery you could charge at night. House uses only electric but has efficient appliances and heat pump. I wonder how big of a battery you’d need to get through winter

https://reddit.com/r/electricvehicles/comments/xbvpbn/used_model_s_battery_1500_for_use_storing_solar/
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Used Model S battery ($1500) for use storing solar from panels on manufactured home ($?). If you drove an efficient BEV with a small battery you could charge at night. House uses only electric but has efficient appliances and heat pump. I wonder how big of a battery you’d need to get through winter



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10 thoughts on “Used Model S battery ($1500) for use storing solar from panels on manufactured home ($?). If you drove an efficient BEV with a small battery you could charge at night. House uses only electric but has efficient appliances and heat pump. I wonder how big of a battery you’d need to get through winter

  1. You can probably do most of the math for this if you have your power bill handy (and it lists daily usage). Just add up the kWh used on each day over winter, and compare it to the kWh storage of the battery.

    Also, remember that storing power in batteries has a loss factor. If you put in 100 kWh of energy from your solar panels, you might get 80kWh of useful energy out again when you use that power. (This loss factor gets worse as your batteries age, too, so you can’t just use the rated loss factor from the specs of a new model 3 battery – that would be optimistic).

  2. not sure how much you save since you need a lot of other stuff to go with it.

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    winter depends on your solar yield and storage capacity. and your typical usage.

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    **How Can the Electric Ford F-150 Lightning Power a House for 10 Days?**

    https://www.newsweek.com/how-can-ford-f-150-lightning-power-house-10-days-1704444

    ​

    [https://en.wikipedia.org/wiki/Tesla_Powerwall](https://en.wikipedia.org/wiki/Tesla_Powerwall)

    The Powerwall+, introduced in April 2021, combines the functions of a Powerwall 2, a Backup Gateway and a solar inverter.[28]

    **Tesla’s virtual power plant actually helped with California grid overload**

    [https://www.inputmag.com/tech/tesla-virtual-power-plant-california-successful-powerwall](https://www.inputmag.com/tech/tesla-virtual-power-plant-california-successful-powerwall)

    Approximately 2,342 pilot program users chose to take part in the event, according to social media posts cataloged by Electrek. Their combined output topped 16 MW of power for the Pacific Gas & Electric company, which covers the majority of northern California. Southern California Edison — which just joined the pilot program this week — received as much as 1.5 MW of power at one point.

  3. I guess it depends on what kind of winter you mean. If it’s a California “winter” then *perhaps* a very oversized solar panel array with a large battery could be just about enough. You can reduce the costs significantly if you allow yourself an emergency fossil fuel power generator and/or residential wind turbine.

    Overall though the main thing that off-grid situation has problems with is the extremes. As in you need to design your power system so that it remains sufficient even with weeks of consecutive overcast winter days. While also using power to heat the home. Right now this is *exceedingly* hard to do without significant amount of fossil fuel burning. Especially at individual scale.

  4. what winter? getting through an anchorage Alaska winter and a Mojave California winter is 2 different ball games. what range does your ev need? a 10 mile commute is different from a 120 mile round trip commute. are you electrically heating the house or gas? cuz electric heaters use a lot of kwhs but in san diego i doubt you would use them a ton.

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