If your bill is just 1200 than i think even a small set up can help.
The 3 kwh inverter price is around 40k. And that is absolutly enought for your house. 1 panel if you buy a better quality is around 10k.
If you can afford than better to buy better quality than chinese brands. Also they are selling many fake solar panels in ph so better to buy it from trusted seller.

And the eletricity meter the new one for solar set ups as i told is 5k. This information is from the cagelco. Maybe it can be different in other places specialy closer to manila.

Just search on fb. There are a lot of sellers and just check who has the best offer.
I am not sure there are some options i think for instalment if you have pag-ibig.

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