Quezon City, Philippines – With solar energy system components getting more affordable each year, more and more are looking into generating their own electricity from the sun. As one of the countries that offer net metering, using solar energy during the day remains the optimal economic approach, as the high repeating expense of procuring and using a battery to store excess energy remains inferior to selling the excess energy back to the grid.
Storing vs Selling Excess Solar Energy
A study at Finland's Lappeenranta-Lahti University of Technology (LUT) has concluded that the expense of residential battery systems means they are less profitable than exporting unused electricity generated by household solar panels to the grid.
The study concluded that the most valuable use of solar electricity was for self consumption, as it avoids the taxes and grid charges associated with each kilowatt-hour of network electricity, as well as the wholesale cost of the energy. [source] Even if batteries increase the self consumption capacity of a building, the repeating costs of replacing batteries outweigh the benefits they bring.
“Many still think batteries are the best, or even a necessary solution for deriving a profit from self-produced electricity,” said Jero Ahola, LUT professor of energy efficiency in electricity-driven systems. “However, current battery prices rarely make the investment profitable.”
In the Philippines, investing in a solar system guarantees a secured payback per year of >15% IRR and a return on your investment (ROI) between 4-7 years. A solar battery decreases your investment case remarkably with an ROI of up to 15 years. Since you have to replace the batteries after 8-12 years, your investment most likely won’t have a return at all.
Backup energy during blackouts
Let’s address the promise: "With a solar battery, you will not experience brownouts anymore".
Depending on the capacity, the solar battery will be able to supply a certain amount of electricity required for basic appliances during a brownout. But running aircons or other major electricity consuming appliances won’t work for long, unless you invest in large scale batteries which cost as much as a car. If you truly seek for reliable electricity security during brownouts, it is up to date much smarter to have a generator back up available.
Selling excess solar more beneficial for home and business owners
To wrap up, given the circumstances in the Philippines, and the current high pricing and heat sensitivity of reliable solar batteries, a grid-tied solar system with net metering is the only recommendation a professional solar company can give to consumers that aim to save on electricity by looking at an attractive investment in solar energy.
Be future ready with us: our PHILERGY German Solar Systems are battery-ready. Once prices go down and the technology advances further, we will make sure to source and install the best battery solutions for you!
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PHILERGY German Solar Philippines is your reliable, high-quality solar energy installer, solar power system, and solar panel supplier in the Philippines with German-made solar equipment combined with experienced German Solar engineering. All installations come with up to 30 years warranty for homes and businesses, and options for flexible solar financing without collateral and additional fees. We are the nation’s top solar company with headquarters, office, and showroom in Manila, Philippines with German management and German head solar engineers setting top-of-the-line solar standards.
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