Using a battery dc source to power the home along with solar
Posted: Thu Aug 21, 2014 3:45 pm
Ok,
A question board members who may have some experience with this type of set up.
I have a solar pv array on my roof that is 7.5kw is size, I have 35 panels on my roof that is an east west orientation.
On the east I have got 3.5kw along with a sunny boy sb3800 inverter.
On the west I have got 4kw along with a sunny boy 4000tl inverter.
I would assume I will produce about 6500 units this year.
So, my question,
I would like to capture as much of my produced energy as possible, as well as be connected to the grid.
I am strongly considering the purchase of a nissan leaf in the near future, and was thinking maybe I could utilise the energy in the battery to power my home in the evening, especially from the months of March to September when I produce much more than I consume, and would be able to use the cars battery to power the home in the evenings.
I was thinking maybe connect the cars battery to another pv inverter ( as it's voltage is well in the dc range of most inverters.
I would then need a few current sensors to sense what's coming into the home from the solar pv system, what's available from the leaf when it's plugged in fully charged, and when not enough is available from my own energy sources, the grid supplies the rest.
Can this be achievable without spending an arm and a leg.
I currently have a self modded plug in prius with a 7kwh lifepo4 battery and when am not using the car, I could use those units of energy in the home now, and use the daylight in the day to recharge, obviously when I not actually using the car for small journeys.
I am in the house most of the day, don't use the car a lot am considering the leaf as the pack size is 24kwh large and would be more than adequate for my daily journeys plus power the home in the evenings too.
Not sure if something as simple as a plc or arduino which monitors the current from all sources that could operate a set of contractors on each supply stage, something I could do on a hobby basis.
What's your thoughts on this idea......
Many thanks, anthony.
A question board members who may have some experience with this type of set up.
I have a solar pv array on my roof that is 7.5kw is size, I have 35 panels on my roof that is an east west orientation.
On the east I have got 3.5kw along with a sunny boy sb3800 inverter.
On the west I have got 4kw along with a sunny boy 4000tl inverter.
I would assume I will produce about 6500 units this year.
So, my question,
I would like to capture as much of my produced energy as possible, as well as be connected to the grid.
I am strongly considering the purchase of a nissan leaf in the near future, and was thinking maybe I could utilise the energy in the battery to power my home in the evening, especially from the months of March to September when I produce much more than I consume, and would be able to use the cars battery to power the home in the evenings.
I was thinking maybe connect the cars battery to another pv inverter ( as it's voltage is well in the dc range of most inverters.
I would then need a few current sensors to sense what's coming into the home from the solar pv system, what's available from the leaf when it's plugged in fully charged, and when not enough is available from my own energy sources, the grid supplies the rest.
Can this be achievable without spending an arm and a leg.
I currently have a self modded plug in prius with a 7kwh lifepo4 battery and when am not using the car, I could use those units of energy in the home now, and use the daylight in the day to recharge, obviously when I not actually using the car for small journeys.
I am in the house most of the day, don't use the car a lot am considering the leaf as the pack size is 24kwh large and would be more than adequate for my daily journeys plus power the home in the evenings too.
Not sure if something as simple as a plc or arduino which monitors the current from all sources that could operate a set of contractors on each supply stage, something I could do on a hobby basis.
What's your thoughts on this idea......
Many thanks, anthony.