It is certainly possible to go off grid for £20 K but only if your customer is willing to be economical in electricity use and to use some other fuel for space heating, water heating and cooking.
10 Kw of PV----------------------------£10,000
24 volt battery, 2,000 AH------------£5,000
charge controllers and inverter------£5,000.
Back of fag packet estimate only. Not including labour.
Lighting and refrigeration would be best worked at battery voltage, with an inverter for most other loads.
A 10Kw nominal system should on average produce about 8 to 10 KWH a day in UK mid winter conditions, and as much as 60 KWH a day in mid summer.
That would supply reasonably efficient lighting, refrigeration, and small appliances. And LIMITED electric cooking such as an induction hob a microwave oven, a toaster, and MAYBE an electric oven.
The charge controller should divert any surplus into water heating. For much of the year this should heat all the water, but some other fuel would be needed in winter.
To get the best results from such a system life style adjustments would be needed.
Bright sunny day =do two loads of washing. Dull cloudy day=leave the washing for a bit.
Bright sunny day=roast beef for lunch. Dull cloudy day=microwaved meat pie for lunch.
It might be worth spending more than £20,000 on going off grid if considering the absence of future electricity bills.
A wind turbine is worth considering if the site is windy. A reasonably sized wind turbine will power electric heating in windy weather.
A diesel generator might be worth considering for larger loads, but the plan should be to minimise use of same due to fuel consumption and noise.
It is certainly possible to go off grid for £20 K but only if your customer is willing to be economical in electricity use and to use some other fuel for space heating, water heating and cooking.
10 Kw of PV----------------------------£10,000
24 volt battery, 2,000 AH------------£5,000
charge controllers and inverter------£5,000.
Back of fag packet estimate only. Not including labour.
Lighting and refrigeration would be best worked at battery voltage, with an inverter for most other loads.
A 10Kw nominal system should on average produce about 8 to 10 KWH a day in UK mid winter conditions, and as much as 60 KWH a day in mid summer.
That would supply reasonably efficient lighting, refrigeration, and small appliances. And LIMITED electric cooking such as an induction hob a microwave oven, a toaster, and MAYBE an electric oven.
The charge controller should divert any surplus into water heating. For much of the year this should heat all the water, but some other fuel would be needed in winter.
To get the best results from such a system life style adjustments would be needed.
Bright sunny day =do two loads of washing. Dull cloudy day=leave the washing for a bit.
Bright sunny day=roast beef for lunch. Dull cloudy day=microwaved meat pie for lunch.
It might be worth spending more than £20,000 on going off grid if considering the absence of future electricity bills.
A wind turbine is worth considering if the site is windy. A reasonably sized wind turbine will power electric heating in windy weather.
A diesel generator might be worth considering for larger loads, but the plan should be to minimise use of same due to fuel consumption and noise.
