Jump to content

How about a solar car port on a budget?


Recommended Posts

11 hours ago, BritManToo said:

I predict the 345w panels will damage the 300w panels.

 

They have very similar max-power and short-circuit currents, the 345W units are slightly higher max-power voltage, both recommend a 20A fuse. I doubt there will be any serious problems, we shall see.

 

It's a few minutes work to move the two 345W panels over to the other string, I may do that later today.

Link to post
Share on other sites
  • Replies 394
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Some of you may remember us building this back in 2015.     Thread here https://forum.thaivisa.com/topic/481794-housebuilding-thread/?do=findComment&comment=9603407  

Warning - solar panels are 'kin heavy when you have to lift them onto the roof 🙂   Finally, the 4 panels are in place.     Panels are fixed using plates and long screws i

Something like this:-  

Posted Images

15 hours ago, Crossy said:

 

They have very similar max-power and short-circuit currents, the 345W units are slightly higher max-power voltage, both recommend a 20A fuse. I doubt there will be any serious problems, we shall see.

 

It's a few minutes work to move the two 345W panels over to the other string, I may do that later today.

I don't know how these strings are configured so assuming you have them arranged as two strings of nine then, adding two more, they would become two strings of ten. There will be no problem except that you will not realise the full power of the 345W units. The new 345W panels would be current limited by the rest of the string. I am also assuming you have taken the additional voltage into account.......

Link to post
Share on other sites
32 minutes ago, Muhendis said:

I don't know how these strings are configured so assuming you have them arranged as two strings of nine then, adding two more, they would become two strings of ten. There will be no problem except that you will not realise the full power of the 345W units. The new 345W panels would be current limited by the rest of the string. I am also assuming you have taken the additional voltage into account.......

 

It's a string of 8 * 345 half-cell and a second string of 8 * 300 + 2 * 345 full-cell panels.

 

I suspect changing the full-cell 345W units to the other string may be a good idea from the capacity point of view but I doubt any actual damage will occur to the 300W panels.

 

The inverter has independent MPPT controllers on each string so mis-matched strings are not an issue.

Link to post
Share on other sites

Ah yes. I understand now. The picture on  your roof earlier included the two 345W panels. 

1 hour ago, Crossy said:

I doubt any actual damage will occur to the 300W

Absolutely right.

Link to post
Share on other sites

Looks great Crossy. 

I think before you were pretty well using all you 45A single phase current. In the future do you plan not to be limited by the grid phase current available and just use the sun and batteries?

Link to post
Share on other sites
3 minutes ago, carlyai said:

Looks great Crossy. 

I think before you were pretty well using all you 45A single phase current. In the future do you plan not to be limited by the grid phase current available and just use the sun and batteries?

 

Batteries are an option if we ever get stuck with a no-reverse meter, until then we'll just push excess into the grid. That bridge will get crossed when we come to it.

 

We do get near our 45A meter limit (50A incoming breaker) when we have visitors (our UK family like A/C when they visit) although the incomer has never opened on overload.

 

 

  • Like 2
Link to post
Share on other sites
2 hours ago, Crossy said:

This is the ESP8266 software

Its great you wrote your own code..but I,being very lazy ( not to mention  no coding skills)

would have used "Tasmota" it has a built in webserver,built in timers, can be easily integrated into a MQTT network, control with a phone app etc etc.

https://tasmota.github.io/docs/

  • Like 2
Link to post
Share on other sites
2 hours ago, Muhendis said:

Innovation is clearly your forte. Well done.

Is it not possible to apply for a feed in tariff account? 

 

It is ... 

 

But (there's always a "but").

 

In order to be eligible for the FIT (called "My Solar Roof" IIRC) you have to:-

Having spoken to PEA we decided to wing it, if we get caught out they will install a no reverse meter and we will have to look at whether it's worth going for a hybrid (batteries) solution.

 

EDIT And, it seems that you have to do the install and then get it approved, no idea what happens if it's not up to scratch.

 

EDIT2 At least there's a plus, the only Sofar inverter on the PEA list is a grid-tie hybrid.

 

  • Like 1
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...