Why not? If you're not using a lot of electricity, a 2kW system is about US$3000. It will produce about 7kWh/day, which is about $0.77 per day. which is about $281/year. So around 11 year payback IF PLN rates don't go up. If it keeps going up at the same annual rate since 2004 then:
1st year - $281
2nd year - $300
3rd year - $322
4th year - $344
5th year - $368
6th year - $394
7th year - $422
8th year - $451
9th year - $482
So about 8.5 years payback if PLN rates continue going up like it has been the last 13 years.
Another way to look at it is how much it will cost you to produce electricity from the system over its lifetime. Assuming the lifetime is only 20 years and you have to put in $2000 in that time for maintenance, inverter replacement, etc, then the system will produce electricity at a cost of: $5000/51,100kWh = around 9.8 cents. For the whole of 20 years.
Now these are very simplified calculations of course. There are things like Levelized Cost of Electricity, IRR, etc that can be done to look at the economics.
No there is no subsidy. But there is a new rooftop PV regulation that just came out a few months ago. Will write more if there is an interest. I wrote a policy review covering the regulation paragraph by paragraph. Will need someone to remind me if anyone is interested. I have 6 papers due by January 1st!
Thank you Rabbit_39 for your posts in this thread, they answer my questions about why solar panels are still not very popular here in Indonesia. What a shame.
Since this thread is over a year old, I'm wondering if since then there are any forum users who have installed solar panels on their house. My sister in law wants to install solar panels on her roof and she asked me for advise. Back home many people have them, but here?
Unfortunately PLN in her area was unable to help her with questions about an EXIM-meter, let alone install one. Same as here where we live, they didn't have clue what I was talking about.Did your sister in law install solar panels in the meantime? And if so, good experience so far?
....., it would be 60 jt costs for access to (non solar) electricity (eventually plus extra fee).
Probably, this would not be too far away from the costs of a solar system including batteries.....
Hmm, in my calculation it was times three (3x).
Don't forget genset or so for backup and rainy weeks.
You must know how much your daily energy needs are. Without it you will just get "fooled" by the contractors. When you say "batteries" they see and hear dollar signs (or pink in the case of rupiahs.
You need to list ALL the appliances you will be using and how many hours per day you'll use it. Ideally you'd know what time of day you'll use it.
Then find out how many watts each appliance uses. Multiply hours by watts divided by 1000 and you get kwh.
This is your daily energy use. Divide that number by three and you get how many kwp of solar panels you should install. Multiply that number by two and that's the minimum amount of installed capacity for your batteries.
In my experience, as a VERY loose rule of thumb if you're paying more than $3 per watt peak for a solar system with the amount of battery installed capacity (in kwh) that is more than 4 times the capacity of your solar panels then you MIGHT be overpaying.
Example: you're installing 3kwp of solar panels. The batteries are 15kwh (installed capacity) and you're paying more than 9,000 dollars, I'd shop around first.
Lithium ion batteries will cost more than the above example for the same given installed capacity.