Solar Vendor Quote Comparison Calculator
Compare rooftop solar installer quotes on ₹ per watt at equal scope, flag prices that look too cheap to be compliant, and see what each quote leaves out.
यहाँ से शुरू करें
- क्या भरें
- दो कोटेशन बिल्कुल वैसे भरें जैसे लिखे हैं, और हर एक में क्या शामिल है वह चिह्नित करें।
- नतीजे का मतलब
- हर कोटेशन समान कार्यक्षेत्र पर ₹ प्रति वाट में बदला जाता है, और छूटी चीज़ें सूचीबद्ध होती हैं।
उदाहरण और सीमाएँ देखें
- आसान उदाहरण
- ₹1,80,000 का पूरा 3 kW कोटेशन ₹60 प्रति वाट है; लायज़न कार्य छोड़कर ₹1,42,000 का कोटेशन करीब ₹47 है और उचित दायरे से काफी नीचे है।
- ध्यान रखें
- उचित दायरा एक अनुमान है। कीमत के आधार पर चुनने से पहले मॉड्यूल और इनवर्टर का विवरण, रखरखाव की अवधि और विक्रेता का पोर्टल पंजीकरण जाँचें।
अपना परिणाम कैलकुलेट करें
अपने आँकड़े दर्ज करें। बदलाव के साथ अनुमान और चार्ट अपडेट होंगे।
विक्रेता कोटेशन की तुलना
दूसरा विक्रेता
- Vendor A
- ₹60/W
- पूरा दायरा, कीमत पर तुलनीय
- Vendor B
- ₹47.33/W
- 4 दायरे की चीज़ें अनुपस्थित
असली कोटेशन में क्या-क्या अलग-अलग दिखना चाहिए
- मॉड्यूल का सटीक मेक, मॉडल और वाट क्षमता माँगें, और पुष्टि करें कि मॉड्यूल सब्सिडी के लिए घरेलू सामग्री की शर्त पूरी करते हैं।
- इनवर्टर का मेक, मॉडल और रेटेड AC क्षमता माँगें, और पुष्टि करें कि यह BIS-प्रमाणित है।
- पुष्टि करें कि कीमत सब्सिडी से पहले की है या बाद की; आमतौर पर आप पूरा भुगतान करते हैं और सब्सिडी बाद में मिलती है।
- जाँचें कि स्ट्रक्चर, केबलिंग, अर्थिंग, सर्ज प्रोटेक्शन और नेट-मीटर का समन्वय कीमत में शामिल हैं।
- रखरखाव की अवधि लिखित में माँगें और यह भी कि सर्विस विज़िट में क्या-क्या शामिल है।
- पूरी राशि कभी पहले न दें; भुगतान को डिलीवरी, कमीशनिंग और पहले उत्पादन से जोड़ें।
Vendor A का कोटेशन पूरा है और इसमें ₹ प्रति वाट सबसे कम है। सस्ता आँकड़ा तभी बेहतर है जब विशिष्टता मेल खाती हो।
मानक के अनुरूप आवासीय सिस्टम के लिए उचित दायरा: स्थापित प्रति वाट करीब ₹55–65। इससे बहुत कम कोई भी दाम हो तो स्पेसिफिकेशन पंक्ति-दर-पंक्ति जाँचें।
अपनी गणना समझें
Solar quotes are hard to compare because they are rarely written on the same scope. One price includes the mounting structure, earthing and the net-metering liaison; another leaves those as extras. One names the module and inverter; another says only that they are included. The fair comparison is rupees per watt at identical scope, and this calculator normalises two quotes to that basis, flags prices that sit far below the market band, and lists what each quote leaves unspecified. On-grid rooftop systems generally land between about ₹55 and ₹65 per watt in 2026, so a quote well below ₹48 per watt usually means something in the specification is missing or cheaper.
Solar Vendor Quote Comparison Calculator कैसे उपयोग करें
- 1
Enter each quote as quoted
System size and total price exactly as the vendor wrote them, including or excluding GST as stated.
- 2
Mark what the quote includes
Toggle structure, earthing and net-metering liaison based on what the quote actually says, not on what the vendor promised verbally.
- 3
Enter the maintenance period
The scheme expects five years of comprehensive maintenance from a registered vendor. A shorter offer is a gap in the quote.
- 4
Read the missing items and the fair band
Use the missing-items list as the agenda for the next conversation with that vendor before treating any price as final.
उदाहरण
Two 3 kW quotes that are not the same product
A complete quote at ₹1,80,000 and a cheaper quote at ₹1,42,000, both for 3 kW. Vendor A works out to ₹1,80,000 ÷ 3,000 W = ₹60 a watt, exactly the band midpoint. Vendor B is ₹1,42,000 ÷ 3,000 W = ₹47.33, and (47.33 − 60) ÷ 60 = −21.1%, past the 20% flag. Vendor B also leaves out liaison, offers two years of maintenance and names neither the module wattage nor the inverter.
- Vendor A price per watt
- ₹60
- Vendor A scope
- complete, 5-year maintenance
- Vendor B price per watt
- ₹47.33
- Vendor B scope
- no liaison, 2-year maintenance, unnamed equipment
- Vendor B gap to the fair band
- 21.1% below the ₹60 midpoint, so flagged
- Difference in total price
- ₹38,000
- Best value by the calculator
- Vendor A
The ₹38,000 gap is larger than one year of savings on a system this size. A quote that much below the band has to be made comparable on scope before the price means anything.
इसकी गणना कैसे होती है
Each quote is normalised to a common unit: price ÷ (capacity in kW × 1,000) gives rupees per watt, rounded to the paisa, so a 3 kW quote and a 5 kW quote can be compared at all.
The distance from the fair band is measured against its midpoint: (price per watt − ₹60) ÷ ₹60, where ₹60 is the middle of the ₹55–65 per watt band. A quote more than 20% below the midpoint is flagged, because the usual cause is equipment or work that has quietly left the price.
Completeness is checked against six items: mounting structure, earthing and lightning protection, net-metering liaison, at least five years of maintenance, a stated module wattage and a named inverter make. Each missing one is listed against the quote.
The best-value vendor is the lowest price per watt among quotes with nothing missing. A cheaper incomplete quote can't win on price, and if no quote is complete, no best value is named.
मान्यताएँ और सीमाएँ
- The fair-price band is a planning range for compliant residential on-grid systems and does not include unusual roof structures, long cable runs or commercial rates.
- Scope completeness is judged from the fields you set for each quote; the calculator cannot inspect the equipment itself.
- The net-metering liaison item covers discom application, inspection and meter coordination, whose fees vary by state and are often partly the household's responsibility.
- The five-year maintenance expectation comes from the scheme's vendor terms; a longer offer is a bonus, and a shorter one is a gap.
- Nothing here verifies a vendor's registration, credentials or performance record. Confirm registration on the national portal and check the vendor's rating there.
अक्सर पूछे जाने वाले प्रश्न
What is a fair price per watt for rooftop solar in India?
For residential on-grid systems in 2026, roughly ₹55 to ₹65 per watt installed for a compliant system, with the lower end of the band applying to larger capacities. Anything far below that band needs its specification examined line by line.
Why are some solar quotes so much cheaper?
Usually because the module wattage class or technology is lower, the inverter is a cheaper tier, or the mounting structure, earthing, protection and net-metering liaison are excluded or billed as extras. Occasionally the vendor is simply not delivering a compliant system.
Should I choose the cheapest complete quote?
Price is the last filter, not the first. Compare the module and inverter specification, warranty terms, the maintenance commitment, and the vendor's registration on the national portal, then compare price among quotes that are genuinely equivalent.
Why does the five-year maintenance period matter?
The scheme requires registered vendors to provide free repair and maintenance for five years, replacing under-performing components at no cost. A quote offering two years has moved a real future cost onto you.
Does the quote price include the subsidy?
It should not be treated as if it did. You normally pay the vendor in full and receive the subsidy in your bank account after commissioning and inspection. A quote presenting a net price is describing the timing of a government payment, not a vendor discount.
What documents should I ask for before paying?
The module make, model and wattage with its compliance status, the inverter make, model and capacity with its certification, the structure material and finish, the earthing arrangement, the net-metering scope, and a written maintenance commitment.
How should payments be structured?
Against milestones rather than entirely in advance. A typical structure links payments to delivery, installation, commissioning and the first months of generation, with a meaningful share retained until the system is inspected and working.