Qbits vs Microtek Solar Inverter Comparison

A useful comparison between Qbits and Microtek does not start with a scorecard. It starts with a question about topology, because the two brands built their solar ranges from opposite ends of the problem. Microtek’s heritage is home UPS (uninterruptible power supply) and battery backup, and its solar Power Conditioning Units grew out of that. Qbits builds grid-tied and hybrid solar inverters. Those are different products solving different problems, and a buyer who lines up a 5 kVA PCU against a 5 kW grid-tied inverter on price alone is comparing the wrong two things.

Disclosure. Qbits Energy publishes this page and is one of the two brands compared. Every Microtek fact below carries a source and the date it was checked, taken from Microtek’s own website rather than from resellers. Every Qbits claim is limited to what the Qbits datasheets and site actually state, including where they state nothing. Where Microtek leads, this page says so.

This guide covers each company’s published footprint, the PCU versus grid-tied distinction, where the ranges overlap, a specification table built only from published values, warranty read as terms instead of years, service and spares, monitoring, grid-code behaviour, and a fit test naming which buyer should pick which.

Short version. Qbits is a grid-tied and hybrid solar inverter specialist, 1.5 kW to 320 kW, IP66 across its listed range, quote-based through dealers. Microtek is a broad consumer power brand whose solar strength is off-grid PCUs and home backup, with a 1 kW to 250 kW grid-tied line and a printed warranty period on its own pages. Choose by topology first, then by the written terms each dealer will sign.

Who Qbits and Microtek Actually Are

The footprint difference here is larger than the specification difference, and it drives most real purchase decisions.

Microtek is a full-range Indian power electronics and electricals brand. Its published categories are power backup (inverter and home UPS, inverter batteries, lithium batteries), critical power backup (online and line-interactive UPS), voltage stabilizers, solar solutions, and electricals including domestic wires, cables and circuit protection devices, according to microtek.in (checked 24 September 2026). The same site publishes “500+ Service Points”, “1200+ Service Engineers”, “1Lac+ Dealer Network”, “2000+ employees”, and “4 manufacturing units across India and presence in over 29 countries”. One practical note for anyone chasing old links: microtekdirect.com now returns a permanent redirect to microtek.in, checked 24 September 2026.

Qbits publishes a narrower scope. It sells solar inverters in two families, on-grid and hybrid, and nothing else. It sells through a dealer channel and lists authorised service partners in a public locator at service-partner locator. Note that “service partners” and Microtek’s “service points” are not the same unit of measurement, so any counts the two brands publish cannot be subtracted from each other.

Microtek’s breadth is a real advantage for a category of buyer. If you want the inverter, the battery, the panel, the stabilizer and the house wiring on one invoice, from one warranty desk, bought at a shop you can walk into, Qbits cannot serve you at all. That is not a small gap. It is the single biggest reason a homeowner reasonably picks Microtek.

PCU or Grid-Tied String Inverter: The Distinction That Decides This Page

Most brand-versus-brand inverter content skips this, and skipping it is how buyers end up with the wrong hardware. The two brands’ flagship solar products are not substitutes.

What a solar PCU does

A Power Conditioning Unit is a battery-centric machine. It charges a battery bank from the solar array, tops that battery up from the grid when solar is short, and runs your connected load from the battery through an inverter stage. Surplus generation has nowhere to go once the battery is full and the load is satisfied, so it is curtailed. Microtek’s own category page is explicit about this: all four solar PCU series carry “Inverter Type: Off-Grid” (microtek.in, 2026). The published bands are HI-END MPPT at 7.5 kVA to 10 kVA, MPPT at 1 kVA to 5 kVA, HI-END PWM at 2.2 kVA to 6 kVA, and PWM at 1 kVA to 3 kVA. Two of those four series use pulse width modulation (PWM) charge control rather than maximum power point tracking (MPPT), so charge-controller type is a per-series question, not a brand question.

What a grid-tied string inverter does

A grid-tied string inverter has no battery. It converts array DC to AC, synchronises to the utility waveform, and pushes surplus energy back through a bidirectional meter under net metering. When the grid disappears, it must stop energising, which is why it gives you no backup during an outage. That behaviour is a regulatory requirement, not a design shortcut, and it is covered in the grid-code section below. A hybrid inverter is the third option: it exports like a grid-tied unit and holds a battery for backup.

The practical consequence is blunt. An off-grid PCU cannot earn export credit, because it never exports. A grid-tied string inverter cannot keep your lights on in a power cut. If you want both, you want hybrid. Our on-grid, hybrid and off-grid decision guide walks that choice in full.

Product Range Overlap and Where They Genuinely Compete

The two catalogues overlap in exactly one place: grid-tied string inverters. Everything else is one brand competing with itself.

Microtek publishes two grid-tied series, single-phase at 1 kW to 5 kW and three-phase at 5.5 kW to 250 kW, both carrying “LIVE Monitoring App” and “BIS Approved” badges, with “IEC certified” on the single-phase line and “DC Switch” on the three-phase line (microtek.in, 2026). It also publishes a Solar Hybrid Inverter series and three Solar Management Unit series, the latter being conversion kits that add solar charging to an existing non-solar inverter.

Qbits publishes on-grid single-phase from 1.5 kW to 6 kW, on-grid three-phase from 5 kW to 320 kW, and hybrid from 3 kW to 12 kW across single and three phase. It publishes no PCU and no conversion kit. So in the 1 kW to 5 kW single-phase grid-tied band, and in the three-phase band from 5.5 kW upward, the two brands are direct competitors. Below that, and in any battery-backup-first configuration, they are not.

The table uses published values only. Where a figure is not published on the vendor’s own public pages, the row says so rather than guessing, and the last column tells you what to confirm on the current datasheet.

Two honest readings of that table. Qbits publishes deeper electrical detail per model, which matters for design. Microtek publishes a warranty period you can read before you speak to anyone, which matters for trust. Both are advantages, and they belong to different brands.

Two Worked Examples That Decide Real Purchases

Both of these are arithmetic, not field data. They exist because these are the two calculations buyers skip.

Why 5 kVA and 5 kW are not the same purchase

Microtek publishes its MPPT PCU series as “KVA Range: 1 KVA - 5 KVA” (microtek.in, 2026). Its grid-tied single-phase series is published in kW. kVA is apparent power. kW is real power. The link between them is the power factor.

Inputs

• PCU apparent power rating: 5 kVA
• Assumed load power factor: 0.8 (a common design assumption for a mixed household load, not a Microtek published figure)
• Comparator: a 5 kW single-phase on-grid inverter

Result

5 kVA x 0.8 = 4.0 kW of real output.

So the PCU delivers about 4 kW of real power against the grid-tied unit’s 5 kW, a 20% gap before any topology difference is counted. Then add topology. The grid-tied unit exports surplus generation for credit; the off-grid PCU curtails it once the battery is full. The PCU gives you backup during an outage; the grid-tied unit does not. Anyone dividing quoted price by the nameplate number is dividing by two different quantities.

Why string sizing needs a number Microtek does not publish

Take the Qbits QB 5/6/8/10/12/15/17KTLC, published with a 180 to 1000 V MPPT window and an 1100 V maximum DC limit. Pair it with an Adani ASB-M10-144-580 module: 580 Wp, open-circuit voltage 52.50 V, temperature coefficient of Voc -0.24% per degree C, at a minimum design cell temperature of 5 degrees C.

Result

52.50 x (1 + (-0.0024 x -20)) = 52.50 x 1.048 = 55.02 V per module. Then 1100 / 55.02 = 19.99, so 19 modules per string, giving 1,045 V at the cold limit with headroom. Twenty modules would reach 1,100 V and sit on the limit, which is not a margin.

Now try the same calculation for a Microtek three-phase grid-tied model. You cannot, from the public category page, because maximum DC voltage and the MPPT window are not published there. That is a scope fact about what the page carries, not a judgement on the product, and the fix is simple: ask for the model datasheet before design. Run your own numbers with the string sizing calculator.

Warranty as Terms, Not Years

Compare documents, not headline numbers. A period without terms tells you almost nothing about what you will actually receive.

Microtek’s position is easier to check before purchase. Its own category pages print “10 Years” on both grid-tied series, “5 Years” on the Solar Hybrid Inverter, “2 Years” on all four PCU series, and “1 Year” on Solar Management Units (microtek.in, checked 24 September 2026). You can read those before contacting a dealer. Credit where it is due: publishing a period publicly, per series, is better practice than making a buyer ask.

Qbits’ public datasheets describe an expandable warranty but do not give the base term, remedy, registration deadline or exclusions. Microtek prints periods on its own public pages, so on this row Microtek is the brand you can actually read before buying. Obtain the current written Qbits warranty for the exact quoted model before purchase. On service logistics, Qbits’ public material does not state a dispatch time, so ask for the committed action after claim approval in writing.

Whichever brand you shortlist, the questions are identical:

1. What is the base term, and what extends it?
2. Is the remedy repair, replacement, credit, or the seller’s choice?
3. Who accepts the claim: the manufacturer, the dealer, or the installer?
4. Who pays de-installation, freight both ways, and re-commissioning labour?
5. Is there a registration deadline after commissioning, and what proof is required?
6. What is excluded: lightning, water ingress, grid abnormality, rodent damage, unauthorised repair?
7. Does the warranty transfer if you sell the property?

Our guide to reading solar inverter warranty terms covers the wording traps in detail, including why the product warranty and the installation warranty are two separate documents.

Service, Spares, and Retail Reach in India

Service is where the two brands diverge most, and where Microtek has a structural edge for residential buyers.

Microtek publishes “500+ Service Points”, “1200+ Service Engineers”, and “1Lac+ Dealer Network” (microtek.in, 2026). Practically, that means an electrician in a district town has probably handled Microtek hardware, and a replacement is often available over the counter. For a homeowner far from a metro, that reduces downtime risk more than any specification does.

Qbits and Microtek describe their networks in different categories, such as channel partners, authorised service partners and service points, so any counts they publish are not comparable arithmetic. Check coverage for your own district against the authorised service partner network rather than relying on a national number.

The rule that applies to both: a directory entry is not a service level agreement. Get the responsible entity named in the quotation, with a ticket channel, working hours, a spares route, travel charges, and any response target in writing.

Monitoring and Data Ownership

Both brands offer app-based monitoring. The differences that matter are about accessories, account ownership and alerts, not screenshots.

Microtek’s grid-tied series carry a “LIVE Monitoring App” badge on both single-phase and three-phase lines (microtek.in, 2026). Qbits publishes Wi-Fi monitoring across its series with optional RS485 or GPRS, and lists monitoring apps on Google Play and the App Store; the QB 225/320K-EHV also lists a Bluetooth app alongside its LED display.

Ask the same four questions of either brand before accepting a monitoring claim:

1. Does the exact model need a logger, dongle or SIM, and is it in the quoted price?
2. Who owns the plant account, you or the installer, and how is it transferred?
3. What is the data refresh interval, how long is history retained, and which faults raise an alert?
4. Does monitoring survive a router change or a SIM expiry without a site visit?

Neither vendor’s category page answers all four. That is normal, and it is why monitoring belongs in the written scope of your quote.

Grid-Code Behaviour Under CEA Regulation 11(6)

This section applies to grid-tied and hybrid units. An off-grid PCU running islanded is a different case, because it is not operating in parallel with the utility.

Any inverter exporting into an Indian distribution network has to disconnect under defined conditions. The Central Electricity Authority (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations, 2013, notification 12/X/STD(CONN)/GM/CEA dated 30.09.2013, First Amendment dated 06.02.2019, Regulation 11(6), sets these:

• Voltage: trip above 110% or below 80% of nominal, clearing within up to 2 seconds.
• Frequency: trip at 50.5 Hz and above, or 47.5 Hz and below, clearing within up to 0.2 seconds.
• Cease to energise within 2 seconds of unintended island formation.
• 60 seconds of stability required before reconnection.
• DC injection no more than 0.5% of full rated output current.

The related test standard is IEC 62116 Edition 2.0 (2014-02), adopted in India as IS 16169:2019, which replaced IS 16169:2014 under the Ministry of New and Renewable Energy (MNRE) Solar Systems, Devices and Components Goods Order, 2025, notified 27 January 2025. Inverter safety sits separately under IS 16221 (Part 2):2015, equivalent to IEC 62109-2:2011. Ask either brand for the certificate covering the exact model against these standards, with issuing body and validity, rather than accepting a logo. The underlying mechanism is explained in anti-islanding.

The Myth That Price Per kW Settles This

The most common way this comparison goes wrong is a spreadsheet with two nameplate numbers and two quoted prices. Three things break that spreadsheet.

First, the units differ. A 5 kVA PCU is roughly 4 kW of real output at a 0.8 power factor, so the denominators are not the same quantity.

Second, the bill of materials differs. A PCU quote implies a battery bank, which is a recurring cost with a finite cycle life. A grid-tied quote implies a bidirectional meter, a net metering application, and DISCOM approval. Different spends on different schedules, so the inverter line item cannot carry the comparison alone.

Third, the value of exported energy differs by state and by DISCOM, and net metering terms move with tariff orders. A system that cannot export earns nothing from surplus generation, however cheap the inverter was.

This page publishes no prices for either brand, deliberately. Qbits sells quote-based through dealers, so there is no list price. Microtek runs its own online store, so you can check its current listed price on the day you buy, which beats any figure printed in an article months earlier. Compare two written quotes for the same topology, same capacity in the same unit, same scope, on the same date.

The Fit Test: Which Buyer Should Pick Which

Answer these honestly. The topology answer does most of the work.

Pick Microtek if most of these are true:

1. You want battery backup during outages more than export credit.
2. Net metering where you live is slow, unavailable, or not worth the paperwork.
3. You want one brand for the inverter, battery, panel and wiring, on one invoice.
4. You are buying below roughly 5 kW, single phase, for a home.
5. You want to buy from a shop you can drive to, serviced by an electrician who already knows the product.
6. You want a published warranty period you can read before talking to anyone.
7. You want to add solar to an existing non-solar inverter, which is what the Solar Management Unit kits are for.

Pick Qbits if most of these are true:

1. Your system is grid-connected with working net metering, or hybrid with export.
2. You are three-phase, or above roughly 15 kW, where MPPT count and the DC voltage window shape the array layout.
3. Your design needs per-model electrical detail: MPPT window, maximum DC voltage, current per MPPT, IP rating.
4. A consultant will audit datasheets before approving hardware.
5. A warranty term and remedy that you have obtained in writing and read matters more to you than counter availability.
6. You accept sourcing panels, batteries, structure and installation elsewhere.

Be clear about the trade with Qbits. It sells inverters only. No panels, no batteries, no mounting, no installation, no stabilizers, no home UPS, no wiring. Its retail footprint is a dealer channel, against Microtek’s published “1Lac+ Dealer Network”. Its public datasheets do not give the base warranty term, while Microtek prints a period per series. If breadth, walk-in retail, and a pre-published warranty period are what you value, Microtek is the better fit and you should buy it.

If the Qbits side fits, start from the on-grid inverter range. For legacy Indian shortlists, see our Microtek and Su-Kam comparison and the Luminous and Microtek comparison.

What to Ask Each Dealer in Writing

Send the same list to both. Differences in what comes back are more informative than any specification sheet.

1. Confirm the exact model number quoted, its rated AC output in kW, and the power factor at which that rating applies.
2. Send the current model datasheet: maximum DC voltage, MPPT window, MPPT count, maximum input current per MPPT, peak efficiency, IP rating.
3. Confirm whether the unit is on-grid, off-grid, or hybrid, and whether it can export under net metering.
4. Send the warranty document, not the period: base term, remedy, registration deadline, freight and labour responsibility, exclusions, transferability.
5. Name the entity that accepts a warranty claim, with the ticket channel and working hours.
6. State the spares route and the nearest stocking point for my district.
7. For hybrid or PCU quotes, confirm the exact battery model, nominal voltage, current limit, BMS protocol, and backup transfer behaviour. “Lithium compatible” is not a compatibility statement.
8. Send the certificates covering this exact model against the applicable Indian standards, with issuing body, coverage and validity.
9. Confirm what monitoring hardware is included, who owns the plant account, and how it transfers.
10. Itemise the quote: SKU, taxes, accessories, delivery, commissioning, validity date.

The Bottom Line

Qbits and Microtek are not really competing across their whole ranges. They compete in the grid-tied string inverter band, and outside it they answer different questions. Microtek is the broader consumer brand with off-grid PCUs, a very large dealer network, and warranty periods printed on its own public pages. Qbits is a grid-tied and hybrid specialist with deeper published per-model electrical detail, IP66 across its listed series, and an expandable warranty whose base term is not defined in public material and has to be obtained in writing. The buyer who needs backup without export, one brand for the whole system, and counter-level service should buy Microtek.

Three actions:

• Decide topology before brand. Write down whether you need export, backup, or both, then eliminate every product that cannot do it.
• Request the model datasheet and the warranty document from both dealers, and convert every rating to kW at a stated power factor before comparing anything.
• Once topology and capacity are fixed, send us your array details for a written specification check.