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[Ste78]

Hello,

 

I drive 60km a day and my EV car is always at home during the day;

usually charged with the normal slow cable (cannot install wall charger since I am renting the house), not a problem leaving connected many hours.

 

Cost per month is quite limited, but I was wondering if I can charge using the daylight:

 

would it be possible to install some solar panels to plug to the car "directly",or need inverter / battery / others?

 

I mean using the real time output, no need storage for using electricity for house.

 

Any advise is appreciated

 

 

[KhunLA]

24 minutes ago, Ste78 said:

Hello,

 

I drive 60km a day and my EV car is always at home during the day;

usually charged with the normal slow cable (cannot install wall charger since I am renting the house), not a problem leaving connected many hours.

 

Cost per month is quite limited, but I was wondering if I can charge using the daylight:

 

would it be possible to install some solar panels to plug to the car "directly",or need inverter / battery / others?

 

I mean using the real time output, no need storage for using electricity for house.

 

Any advise is appreciated

I wouldn't think practical, or economical if practical.  At peek time, if sunny, most you're going to get from any one panel is 500-700w per hour, and need an inverter to use.  Consider your slow charging cable is 2-3+kWh per, and you see the issue.

Edited 2 hours ago by KhunLA

[Ste78]

11 minutes ago, KhunLA said:

I wouldn't think practical, or economical if practical.  At peek time, if sunny, most you're going to get from any one panel is 500-700w per hour, and need an inverter to use.  Consider your slow charging cable is 2-3+kWh per, and you see the issue.

 

60km I think is around 8Kwh consumption (~35b /day, 1000b /month).

 

With 1 panel 1000W costing 1500b, chargin 8Kwh would not take 8 hours?

 

Even if I not spend much money, those 1500b could be saved in one and a half months.

 

Or you meaning other equipment is necessary?

[Crossy]

Where are you getting 1,000W panels for 1,500 Baht??

 

A 1kW panel would generate about 3-4kWh per day of decent sunshine. It would also be about 3m x 2m and weigh ...

 

Direct EV charging (DC) from solar is an emerging technology = $$$

 

Easier would be to use a simple grid-tie inverter to supplement your grid energy usage whilst using the "granny charger".

 

 

[Ste78]

1000w for 1470b, one of the first results on Lazada.

 

Thanks for clarify that 1kW panel makes 3-4kWh per day, I am not an expert.

 

So I can buy 2, still save the money in a few months.

[Crossy]

Do you have an actual link for that?

 

850mm x 680mm = about 0.5m² 

 

With the absolute maximum insolation from our local star being about 1kW per m² that panel is 200% efficient!!!

 

Most real panels are about 20% efficient. A 330W panel is about 1m x 2m.

 

Something doesn't add up.

 

 

[johng]

2 minutes ago, Ste78 said:

1000w for 1470b, one of the first results on Lazada.

I don't think you should believe that 😋 

or perhaps you should buy one and then test how many Watts it really delivers.

[Ste78]

1 minute ago, Crossy said:

Do you have an actual link for that?

 

850mm x 680mm = about 0.5m² 

 

With the absolute maximum insolation from our local star being about 1kW per m² that panel is 200% efficient!!!

 

Most real panels are about 20% efficient.

 

Something doesn't add up.

 

 

 

https://s.lazada.co.th/s.JQNPp

 

you may be right about efficiency or the need to verify in person.

I just picked up the first results on Lazada

[Crossy]

There's no "may" about it!! 

 

They also show PWM charge controllers which are hideously inefficient.

 

To be honest, that kit would be nearer to 100W than 1,000W, sorry.

 

[Crossy]

I really hate this kind of advertising as they put the solar industry in a bad light when they come nowhere near the advertised performance.

 

Somewhere in there is the disclaimer, not found it yet.