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bob4866
I have solar panels fitted, with a capacity of 2.4 -2.5 kW. I am considering buying lithium battery storage for evening use. What would be the largest battery system I could charge from this setup?
bob4866 said:I have solar panels fitted, with a capacity of 2.4 -2.5 kW. I am considering buying lithium battery storage for evening use. What would be the largest battery system I could charge from this setup?
anorlunda said:
Thanks anorlunda, very fast reply with a simple, easy to read answer. I have a device that records hourly readings from my panels on a spreadsheet so I can now get an accurate figure before committing to a battery system.
Assume:
2.5*5 = 12.5 kWh of batteries is the largest amount you can charge.
- Your panels produce close to full power for 5 hours per day.
- You consume zero during those 5 hours.
If you use much bigger capacity (but don't go wild!) and you use less than full capacity on most nights then you would have extra for rare occasions.Rx7man said:You can go larger, though you won't get them charged in a single day if you run them right empty.
sophiecentaur said:PV was, for a time, the obvious way to go but the Feed In Tariff is rubbish now.
I have a friend who had the right house at the right time and the right money. The feed in tariff at the time was ludicrously high (to attract customers and to make Blair look good). My friend's FIT income pays for all his house services. And all the other Electric supplier's customers are subsidising him. Now I have an appropriate house and some cash, the deal is rubbish as the FIT is falling and falling. There seems to be no incentive any more.anorlunda said:Please enlighten us. What happened to the Feed In Tariff in the UK?
sophiecentaur said:The feed in tariff at the time was ludicrously high (to attract customers and to make Blair look good).
bob4866 said:I have solar panels fitted, with a capacity of 2.4 -2.5 kW. I am considering buying lithium battery storage for evening use. What would be the largest battery system I could charge from this setup?
FIT was around £0.44 per kWH in 2010 but is now down to <£0.04 per kWH I think.anorlunda said:Please enlighten us. What happened to the Feed In Tariff in the UK?
Once you have a reservoir of water, that's the best and cheapest storage medium.Rx7man said:we're looking at hydro generation for about 2kW 24/7..
terrain doesn't allow for storage, but there is a reasonably steady flowsophiecentaur said:Once you have a reservoir of water, that's the best and cheapest storage medium.
Bad luck. But good luck that you actually have water flowing through! I have never had that good fortune. From what you say, you probably have a large flow with not much head of water (?).Rx7man said:terrain doesn't allow for storage, but there is a reasonably steady flow
This is off I think. $$1MJ =.27kWh$$sophiecentaur said:A tank of water, 2.5X4m and 1m deep, at a height of 10m will store about 1MJ, which is worth about 2.7kWh, which is almost half the capacity of a Tesla Powerwall Battery.
Not really, They just get endangered species protection under the fish act, it was the easiest place to put themOpera said:In California a bee is legally a fish. I love politics.
The maximum battery capacity that can be charged from 2.5kW solar panels depends on the efficiency of the solar panels, the amount of sunlight available, and the type of battery being used. Generally, a 2.5kW solar panel system can charge batteries with a capacity ranging from 5kWh to 15kWh.
Yes, it is possible to charge multiple batteries with a total capacity exceeding 15kWh from 2.5kW solar panels. However, it may take longer to charge the batteries and may require additional equipment such as a charge controller to regulate the flow of electricity.
The time it takes to charge a 10kWh battery with 2.5kW solar panels depends on several factors such as the amount of sunlight available, the efficiency of the solar panels, and the type of battery being charged. Generally, it can take anywhere from 4-8 hours to fully charge a 10kWh battery from 2.5kW solar panels.
Yes, you can use 2.5kW solar panels to charge a battery with a capacity lower than 5kWh. The solar panels will still be able to charge the battery, but it may take longer as the panels are producing more energy than is needed to charge the smaller battery.
While it is technically possible to charge a battery with a capacity higher than 15kWh using 2.5kW solar panels, it may not be practical. The charging time will be significantly longer and it may require additional equipment to handle the excess energy being produced by the panels. It is recommended to use a larger solar panel system for charging batteries with higher capacities.