Comment by newyankee
Comment by newyankee 16 hours ago
The thing is LFP or Sodium ion are both expected to have 5000+ useful cycles soon (or possibly even in production now). This means even if you use one full discharge overnight , this is like 15+ years of life of the battery, although I suspect calendar degradation will be much faster.
Higher the cycle life, lower the levelised cost of storage and this is what matters in my opinion. Best is to have some type of long term storage like a Diesel generator only for estimated 1-2 weeks of the year depending on location where it will be needed.
I feel V2G with 3 days backup and a house low power mode which can be utilised in emergencies might solve even this issue.
Oversizing solar to the extent possible for winter loads is also ideal because so far that does not seem to be the driving cost.
> Best is to have some type of long term storage like a Diesel generator only for estimated 1-2 weeks of the year depending on location where it will be needed.
Unless you live in a location without much sunlight, it’s better to invest in a solar powered system with a transfer switch to go off grid.
If you size the system appropriately it can recharge the battery by day during an outage and now you can operate off-grid for a very long time.
Diesel generators come with maintenance overhead that adds up year over year. They also contribute nothing during normal times, as opposed to a solar install which can offset electricity costs or even earn money.
If you live somewhere dark this is less helpful, though.
Consumption also matters. Some people have eye-popping amounts of electricity consumption while other households get by with far less. The difference, including heating and cooling costs, is surprisingly large between the highest and lowest households.