How the Math Works
Understanding MSEDCL Net Metering, Battery ROI, and why the grid is actually your biggest battery.
🍅 The Tomato Analogy: Net Billing vs. Net Metering
Imagine your solar panels are a garden that grows tomatoes (electricity), and the power grid (MSEDCL) is a local grocery store.
❌ The Old Way: Net Billing
During the day, you sell your extra tomatoes to the store for a wholesale price of ₹2.8 each. Later at night when you get hungry, you have to buy them back at the retail price of ₹9.0 each! You lose a lot of money on the difference.
✅ Reality: True Net Metering
MSEDCL works like a Bank Vault. During the day, you put your extra tomatoes into the vault. At night, you walk into the vault and take your exact same tomatoes back out for FREE (a 1:1 swap). You only get paid ₹2.8 if you leave extra tomatoes in the vault for a whole year.
The 1:1 Bank Vault Visualized
🔋 Why is Battery ROI "N/A" (Backup Only)?
Many solar sellers will try to convince you that buying a battery will save you money on your daily electric bill. Because of True Net Metering, this is mathematically false.
The Reality: If the grid already gives you a free, 100% efficient way to store your daytime energy (the vault) and use it at night, buying an expensive ₹75,000 physical battery provides ZERO extra financial return on your daily bill.
If you buy a battery, it simply holds your extra daytime energy to use at night. But the grid was already doing that for you! Therefore, the physical battery doesn't actually save you any extra money over what the grid was already saving you.
So why buy a battery at all?
The only reason to buy a battery in a Net Metering setup is for Peace of Mind. If the grid goes down (a power cut), the "bank vault" is locked, and your on-grid solar system shuts down. A physical battery keeps your lights, fans, and Wi-Fi running during a blackout.