Ansari Information

Five years and three months. On the sums below, that is the rooftop solar payback for a 3 kW system on a home using 300 units a month at ₹6 a unit, after the PM Surya Ghar subsidy. At ₹4 a unit the wait stretches by two and a half years. The subsidy and the sun are fixed; your bill is not.

Why does the rooftop solar payback hinge on your tariff?

Because the subsidy and the panels' output are both fixed for a given size, the only large variable left is what each unit you stop buying is worth, and that is the slab tariff on your own bill.

The subsidy is a set rupee sum. The government's PM Surya Ghar page on india.gov.in (checked 29 October 2026) pays ₹30,000 a kilowatt for the first two and caps support at 3 kW, leaving ₹18,000 for the third. Every kilowatt past three costs full price, so the advice to fill the roof while the subsidy lasts is backwards.

Output is fixed too. BSES Delhi's Rooftop Solar FAQ (September 2025) puts each kilowatt at 3 to 4 units a day, and nothing under cloud cover, so 3 kW roughly matches a 300-unit home. It's the units-first logic we used to price an AC by kWh, not its star label.

Two dates sit on top of the sum. The scheme runs till FY 2026-27, so a system commissioned after 31 March 2027 may get nothing; our read is not to plan around an extension nobody has announced. Its collateral-free loan costs repo plus 50 basis points: 5.75% when MNRE minister of state Shripad Naik replied in the Rajya Sabha, as SolarQuarter reported on 29 July 2026. The RBI lifted repo to 5.50% on 7 October 2026, adding about ₹15 a month to a ten-year instalment (we ran the same hike against a home loan prepayment versus a SIP). Four numbers carry the decision.

So borrow the post-subsidy cost at the scheme rate and the instalment is smaller than the electricity you stop buying: the system pays its way from the first bill, once the subsidy lands.

How many years does a 3 kW system take to pay back?

A 3 kW PM Surya Ghar system takes about five years to pay back for a 300-unit home at ₹6 a unit, closer to eight years at ₹4 and about four at ₹8.

Worked example: a 3 kW system on a home using 300 units a month at ₹6 a unit. Assumptions: BSES's estimate of about ₹65,000 a kilowatt, 3.5 units a kilowatt a day (the middle of its range) and surplus valued at an assumed ₹4 a unit. Gross cost is ₹1,95,000; less ₹78,000 of subsidy leaves ₹1,17,000. The panels make 315 units a month: 300 replace units worth ₹21,600 a year, and 15 exported are worth ₹720. That is ₹22,320 a year, and ₹1,17,000 divided by ₹22,320 is 5.2 years.

The grid runs that sum for a 300-unit home. Your one-minute check: take the top-slab rate from your last bill, find your size down the side and read across to years to break even.

The bold cell is the worked example. A 2 kW system pays back sooner but leaves 90 units a month on your bill. The third kilowatt, about ₹47,000 after its subsidy share, earns roughly ₹7,200 a year: about 6.5 years. The fourth gets no subsidy and exports nearly everything, so it needs close to 13 years.

What happens to extra solar units under net metering?

Under Delhi's net-metering rules, extra units carry forward from month to month, and any surplus left at the year's end is paid at the regulator's average power purchase cost (APPC), not at your retail tariff.

BSES says Delhi's regulator sets APPC and may revise it yearly; your state may differ. That is the fourth-kilowatt problem: you sell wholesale and buy retail.

Headlines need the same care. A Rajya Sabha written reply, reported by SolarQuarter, counted 3,972,447 rooftop systems installed by 22 July 2026 and 1.89 million households reporting zero bills, but only in months when generation met most of their needs. Model twelve months of partial savings; the zero-bill figure is the wrong yardstick.

BSES gives panels 25 years and inverters 10 to 12, and subsidised systems typically carry a five-year system warranty, so later repairs are yours. On the worked example's terms, payback reaches ten years only near ₹3 a unit; below that, a new inverter arrives first. State money pulls the other way: Delhi adds ₹10,000 a kilowatt up to ₹30,000, cutting the example to about 3.9 years. If the cash would otherwise sit in a deposit, check the post-tax gap between an FD and a debt fund, as we did for the payback years on a mini split.

• Subsidy timing: carry the full cost until the subsidy lands.
• Oversized quotes: sized to your roof, not your bills.
• Monsoon months: output stops under cloud, so bills won't hit zero.
• Warranty gap: ask who pays for the inverter after the warranty.

Our call: switch if your top slab costs ₹5 a unit or more, and stop at 3 kW unless you use well above 300 units a month. Stay on the grid tariff nearer ₹3, because the inverter will need replacing before the panels pay you back. This is wrong if your state adds a top-up or pays more for exported units, so this week run your last twelve bills through the calculator above and check your DISCOM's subsidy status on the national PM Surya Ghar portal before asking for a quote.

$329. That's what Apple's repair estimator charged for a new front screen on an iPhone 17 Pro, as 9to5Mac reported on 12 September 2025, and the whole question turns on it. So is AppleCare worth it? Add two years of AppleCare+ with Theft and Loss to the fee Apple charges per crack, and set that beside the repair bill. One cracked screen is roughly where the lines cross.

Is AppleCare worth it if you crack one screen?

Yes, but barely: on yearly billing an iPhone 17 Pro owner who cracks one front screen in two years comes out about $20 ahead, and anyone who cracks nothing has paid $279.98 for reassurance.

Apple Legal's AppleCare fees page, as of October 2026, charges $29 for outer display or back glass damage, and a separate fee applies to each repair. Apple's New York price disclosure for AppleCare+ with Theft and Loss, dated September 2025, lists the iPhone 17 Pro at $13.99 a month, $139.99 a year or $269 for a 24-month fixed term. Same phone, same crack, three different answers.

Worked example: assume an iPhone 17 Pro, AppleCare+ with Theft and Loss billed yearly, 24 months of ownership and one front-screen crack. Premiums are 2 × $139.99 = $279.98. Add the crack fee: $308.98. Without the plan you pay the $329 repair, so the plan wins by $20.02. Billed monthly, premiums become 24 × $13.99 = $335.76; with the fee that's $364.76, and the plan now loses by $35.76.

Twenty dollars is a thin margin for peace of mind. We'd judge it like the payback years on swapping a window AC for a mini split: it earns its place only if payback lands inside the time you own it. Monthly billing is the trap of paying a credit card annual fee to chase its waiver: a cost sliced small stops looking like one.

Four numbers frame every case below. Apple's AppleCare page, read in October 2026, says most Apple products get one year of hardware coverage under the limited warranty, and that plans include unlimited incidents of accidental damage, each with its fee. The fourth card is our own arithmetic.

The free first year matters: any defect then is Apple's problem anyway, so year-one premiums buy only accident and theft cover.

That odds figure is one division: $279.98 of premiums over the $300 a crack saves after the fee.

What two years of cover cost, crack by crack

Over 24 months on an iPhone 17 Pro, AppleCare+ only finishes ahead when a front screen breaks, and how you pay moves the result by more than the plan's entire margin on one crack.

Find your row by what breaks in two years, then read across at how you pay. Each cell is what the plan leaves you ahead (+) or behind (−) against Apple's reported repair prices, including $159 for back glass.

The shaded cell, one front-screen crack on yearly billing, is the base case at +$20. One column left, monthly, flips it to −$36; one row up, back glass only, drops it to −$150. Now the one-minute check: divide your plan's two-year cost by $300 and compare it with your honest odds of cracking a front screen. Count the screens you broke on your last two phones first.

Where the one-crack rule bends

The one-crack rule bends when the phone is lost outright, which the plan covers far more generously than a crack, and when several Apple devices could share one AppleCare One bill.

Apple Legal sets the theft and loss deductible at $149. A new iPhone 17 Pro started at $1,099 in the US, per Apple's September 2025 launch release, so one lost phone saves about $950. On our arithmetic, yearly premiums break even on loss alone if your odds of losing it within two years top roughly 29%. That bar sits far below the crack bar, and we think most buyers undervalue it.

We found no current, method-published US figure for how often owners crack a front screen, so your odds are yours to estimate (the honest grey area here). Weigh them like renewing versus porting a health insurance policy: by what you claimed, not what you fear.

Is AppleCare One cheaper than AppleCare+?

For one iPhone alone, no: AppleCare One Individual costs $19.99 a month for up to three products, so it beats a $13.99 iPhone plan only once a second or third device rides on it.

At $239.88 a year it costs $99.89 more than the yearly iPhone plan, so the extra devices must be ones you'd otherwise insure.

• Batteries: Apple's battery service page says the plan replaces it free once capacity drops below 80%. The reported $119 out-of-warranty price counts only if yours dips under that line within two years.
• Monthly billing: 24 payments cost $55.78 more than two yearly ones.
• Pro Max: its reported $379 screen puts yearly AppleCare+ $70.02 ahead after one crack.

Our call: stay uninsured on an iPhone 17 Pro if you can't honestly see a front-screen crack coming within two years, and bank the premium yourself. Switch to AppleCare+, billed yearly, if you can, or if losing a phone is a real risk. This is wrong if Apple has cut its screen price since September 2025, so this week, before you buy, open Apple's repair estimator for your exact model and confirm the screen still costs more than your two-year plan plus the $29 fee.

A window unit cooling one room through a 1,000-hour summer burns about $202 of electricity. A mini split doing the same job burns about $110. That $92 gap is the entire case in the mini split vs window ac argument, and it has to repay an install bill of thousands. Here is the sum, line by line, so you can swap in your own numbers.

Is a mini split worth it over a window unit?

No, not on cooling savings alone: at the average US residential price of 18.31 cents per kilowatt-hour, a mini split's electricity saving is worth under $8 a month averaged over a year.

That price is the July 2026 residential average in the Energy Information Administration's Electric Power Monthly (released 24 September 2026), up 4.9% on a year earlier. Rising prices favor the mini split, but 4.9% of a $92 saving is under $5 a year, so the trend will not rescue the payback.

Three assumptions, all mine: a 12,000 BTU/h (one-ton) unit running 1,000 full-load hours a summer, and a $3,000 install, inside the $2,000 to $6,000 Filterbuy's 2026 cost guide gives for one room (Carrier quotes $2,000 to $10,500 for 1,000 square feet).

• Window unit: the Department of Energy's floor for a louvered unit this size, built since 2014, is 10.9 CEER, a combined efficiency score in BTU of cooling per watt-hour. 12,000 ÷ 10.9 is about 1,101 watts, so 1,101 kWh over the summer, times 18.31 cents, is $202.
• Mini split: assume 20 SEER2, a seasonal score of the same kind. 12,000 ÷ 20 is 600 watts, so 600 kWh, which is $110. Carrier's single-zone line lists top ratings from 22.4 to 35.1 SEER2, so 20 is not a stretch.
• The gap: 501 kWh, or $92 a summer.

One caution: SEER2 averages a mild season while CEER is a single hot-day test, so the comparison tilts a little toward the mini split (I would rather say so than flatter the upgrade). We ran the same kWh-first method in rupees in our piece on pricing an AC by kWh instead of stars.

Four numbers decide the swap, and read together they turn a $92 headline into a decision.

Take the yearly saving a ten-year payback demands. At the 501-watt gap between the two machines, reaching it would take about 3,270 full-load hours in a summer, which is 136 days of nonstop cooling. That is my arithmetic, not a published figure, and no ordinary room comes close.

A certain saving set against an upfront cost is a familiar shape: see a home loan prepayment against a SIP at the break-even rate.

Mini split vs window ac: the decision table

Stay with the window unit if it still works, and switch only when one of four conditions applies; the table prices each side so you can see which way every row pushes.

Read the left column first. A tick favors the swap, a warning sign means it depends on your home, and a cross counts against it.

Only one row clearly favors the mini split, and it is about running it, not buying it.

What breaks the payback sum?

Cheaper power or fewer cooling hours stretch payback toward half a century, while a dead window unit or a winter heating need shrinks the gap the install has to repay.

At 12 cents a kWh, an assumption of mine, the $3,000 takes about 50 years; at 25 cents, about 24. Buying down does not help: the federal floor for heat pumps since 2023 is 14.3 SEER2, per Carrier's summary of the Department of Energy rule. A unit at that floor saves only $48 a summer against the window unit, so payback passes 60 years.

Tax credits used to bend this sum. The IRS page for the Energy Efficient Home Improvement Credit (last reviewed 28 April 2026) allows up to $2,000 a year for heat pumps, but only for property placed in service through 31 December 2025, so a 2026 install gets nothing. Whether your utility or state still pays a rebate is the open question, and my view is that a rebate you cannot see in writing is not a number.

• Get quotes with any rebate printed on them.
• Read the rated SEER2 on the exact model; the 20 here is an assumption.
• Count your real cooling hours: a room cooled only on summer evenings sits far below 1,000.
• If the window unit is dying, price its replacement and subtract it, because only the difference needs repaying, the same sunk-cost move as in paying a card annual fee instead of chasing its waiver.

Stay with the window unit. Unless it is dying, the room needs winter heat, your building bans window units, or you cool around the clock for months, the swap is a 30-year bet at best. This week, pull last summer's electric bills, estimate your cooling hours honestly, and re-run the sum above with your own price per kWh before anyone hands you a quote.

Related: rooftop solar payback after the PM Surya Ghar subsidy, worked at your own tariff

₹64,500. That is what four nights in an ₹8,000 room instead of a ₹5,000 one cost once the insurer applies proportionate deduction to a ₹3 lakh bill, more than five times the extra rent. The policy is ordinary: ₹5 lakh cover, room rent capped at 1%. Nobody quotes the number at admission. You meet it at discharge.

What is proportionate deduction in health insurance?

It is the insurer's rule that if your room costs more than the policy's daily room cap, every charge linked to that room is paid only in the same ratio as the cap bears to your room rent.

Outlook Money's August 2026 explainer gives the logic: hospitals price surgeon fees, theatre time and nursing by room category, so a dearer room implies dearer everything. Caps are a fixed rupee figure or a share of sum insured, commonly 1%, which on ₹5 lakh puts the line at ₹5,000 a night.

The whole sum, four nights, ₹3,00,000 billed, eligible ratio 5,000 ÷ 8,000 = 62.5%:

• Room rent: 4 x ₹8,000 = ₹32,000 billed, ₹20,000 paid, ₹12,000 cut.
• Linked charges (surgeon, theatre, nursing, doctor visits): ₹1,40,000 billed x 62.5% = ₹87,500 paid, ₹52,500 cut.
• Exempt heads (pharmacy, implants, diagnostics): ₹1,10,000 billed and paid in full.
• Items the policy lists as non-payable: ₹18,000 billed, nothing paid.

Your share: ₹82,500. Remove the ₹18,000 you would lose in any room and ₹64,500 is the upgrade's price, my arithmetic on an illustrative bill, not an insurer's quote. Every extra rupee of rent cost about ₹5.38, or, put less politely, the upgrade was the dearest thing in the building.

This is not an edge case. IRDAI's 2024-25 annual report, per Insurance Business in July 2026, counts 3.26 crore health claims with 8% repudiated outright, and partial cuts like this sit on top, uncounted. No insurer-wise denial reasons are published, so you must run the sum from your own schedule. Deciding whether to renew or port your health insurance? Read the room cap line first. If your share would come from savings, the FD versus debt fund gap on ₹5 lakh shows what that money earns meanwhile.

I don't object to the cap. I object to the timing: the insurer knows the ratio when it approves admission and should print your payable share on that approval. The four numbers below come from IRDAI's May 2024 Master Circular, Outlook Money, and the 2024-25 IRDAI and Ombudsman reports via Insurance Business.

The deadline is the one to use. The admission-day authorisation carries an approved amount and an assumed room category; ask for it in writing. If it names a cheaper category than your bed, the ratio is running, and you can still move before the first night is billed.

Capped room or upgrade: which leaves you paying less?

The capped ₹5,000 room leaves you paying only the ₹18,000 of non-payable items, while the ₹8,000 room adds ₹64,500 of ratio cuts, so on this bill the upgrade costs more than five times its extra rent.

The table runs both rooms against one illness, with linked fees billed identically. A cheaper room often lowers them too, which changes the insurer's share, not yours.

One row does the damage: linked fees, where the ratio bites on a base over four times the rent itself.

The bar settles whether the upgrade pays on a capped policy: over a fifth of the bill vanishes to the ratio, three times the never-covered share. Derived from this article's illustrative bill.

How do I avoid a room rent cut on my claim?

Pick a room at or below your policy's daily cap, or hold a plan with no room cap at all; beyond that, check every line of the deduction letter, because several heads are legally off-limits.

IRDAI's June 2020 product-filing guidelines, reported by Business Standard, bar the ratio on ICU charges, pharmacy, implants, medical devices and diagnostics, and at hospitals that do not bill by room category (as of 2020). Under the May 2024 Master Circular, charges from a late discharge approval fall on the insurer, Deccan Chronicle reported.

Still cut? Complain to the insurer, then the Insurance Ombudsman. Its 2024-25 report counts 53,184 complaints, about 64% of them health, so your dispute is its main business.

My view on the grey area: when no room within your cap is free the night you arrive, the ratio should not apply. Argue it in writing. The break-even logic for home loan prepayment against a SIP works here too.

• A cap written as a rupee figure does not rise when you raise your sum insured.
• A cap named as a room type still bites if you move up a category.
• A deduction on ICU days, pharmacy, implants or diagnostics is challengeable line by line.

Stay in the capped room: on this bill the upgrade buys four nights of comfort for ₹64,500. Switch at renewal only if a no-cap plan costs under ₹6,450 a year more, my ten-year break-even against one such claim. This week, find the room rent line in your policy schedule and write its daily rupee figure on your health card.