Solar vs Electricity Bill — How Much Will You Actually Save?
Updated March 2026 | Sri Ishaan Solar
The #1 question we get: "How much will my bill reduce?" Here are real numbers from our Hyderabad installations.
Real Before/After Examples
| Home Type | Before Solar | After Solar | Monthly Saving |
|---|---|---|---|
| 2BHK Apartment | Rs 2,000 | Rs 150 | Rs 1,850 |
| 3BHK Villa | Rs 3,500 | Rs 200 | Rs 3,300 |
| Independent House | Rs 5,000 | Rs 250 | Rs 4,750 |
| Large Villa (AC heavy) | Rs 8,000 | Rs 500 | Rs 7,500 |
25-Year Savings Projection
- Rs 2,000 bill → Rs 5.5 lakh saved over 25 years
- Rs 3,500 bill → Rs 9.9 lakh saved
- Rs 5,000 bill → Rs 14.2 lakh saved
- Rs 8,000 bill → Rs 22.5 lakh saved
And electricity rates increase 5-7% every year. Solar locks in your rate at Rs 0.
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📊 Hyderabad Electricity Tariff — 2026 TSSPDCL Slabs
Solar savings ని properly calculate చేయాలంటే, మీరు ఏ slab లో ఉన్నారో అర్థం చేసుకోవడం అవసరం. TSSPDCL domestic tariff 2026:
| Units / Month | Rate/Unit | Monthly Bill (example) |
|---|---|---|
| 0–100 units | ₹1.45/unit | ₹145 (+ fixed charges) |
| 101–200 units | ₹7.60/unit (slab 2) | ₹1,050–₹1,800 |
| 201–300 units | ₹8.50/unit (slab 3) | ₹2,350–₹3,200 |
| 301–500 units | ₹9.50/unit (slab 4) | ₹4,500–₹6,500 |
| 500+ units | ₹10.30/unit (slab 5) | ₹7,000+ |
Key insight: Most Hyderabad families (3–4 BHK, 1–2 ACs) consume 250–600 units/month — slabs 3, 4, 5. Solar eliminates these high-rate units first. A 5 kW system generating 600 units/month effectively reduces your bill from slab 4 (₹9.50) to slab 1 (₹1.45) — ₹8.05/unit savings on every unit replaced.
📈 25-Year Bill vs Solar Savings Projection
Electricity tariff increases 5–7% annually (APERC/TSERC historical trend). Here's how the math plays out for a 5 kW solar customer:
| Year | Grid Bill (without solar) | Solar Savings | Cumulative Savings |
|---|---|---|---|
| Year 1 | ₹60,000/year | ₹54,000 | ₹54,000 |
| Year 5 | ₹77,000/year (7% escalation) | ₹69,000 | ₹3.2L |
| Year 10 | ₹1.08L/year | ₹97,000 | ₹7.5L |
| Year 15 | ₹1.52L/year | ₹1.37L | ₹13.8L |
| Year 25 | ₹2.98L/year | ₹2.38L | ₹32L+ |
5 kW system cost after PMSG subsidy: ₹2.72L. Break-even: Year 5. 25-year net profit: ₹29L+.
❓ Savings FAQ
AC వాడతే solar savings తక్కువ అవుతాయా?
Opposite! AC వాడడం వల్ల consumption high slab లో ఉంటుంది (₹9.50–₹10.30/unit). Solar ఆ high-rate units replace చేస్తుంది — savings maximum అవుతాయి. 1.5T AC 8 hr/day = 360 units/month. 5 kW solar అది fully cover చేస్తుంది + billing slab కి drops. AC owners కి solar fastest ROI.
Night time electricity bill solar తగ్గిస్తుందా?
Net metering system లో: daytime excess export → grid credits earn చేస్తాయి → night import against those credits. Annual settlement లో net zero bill possible. Battery system add చేస్తే night also solar power directly. Grid-tied only: night consumption = grid import, but annual credit offsets it.
Solar bill savings guarantee ఉంటుందా?
Generation guarantee: Tier-1 panels 25-yr performance warranty (Year 25: 80%+ output). Savings depend on tariff (DISCOM can change, but historically only increases — benefits solar more). Sri Ishaan Solar site survey లో irradiance data, shading analysis తో realistic savings projection ఇస్తాం — not inflated numbers.
Last updated: May 2026