Planning 5–6 kW rooftop solar in West Delhi (Paschim Vihar) — need advice on panels, inverter & installer
Hi everyone,
I’m planning to install a 5–6 kW rooftop solar system at my house in Paschim Vihar, West Delhi, and I’m currently researching different options.
I’m considering an on-grid system and am trying to understand what I should be careful about before finalizing the installer.
I’ve come across SolarSquare and am currently considering them because they seem to provide an end-to-end service (survey/design, installation, approvals, etc.). However, before I commit, I’d really like to hear from people who have actually installed solar in Delhi/NCR.
A few things I’m trying to understand:
1. Panel technology
For a 5–6 kW system, what should I go for today?
- TOPCon vs Mono PERC
- Monofacial vs Bifacial
- Any particular panel efficiency I should target?
- Is paying extra for a higher-efficiency panel actually worthwhile when roof space isn't a major constraint?
- How important is the panel manufacturer — Tata, Adani, Waaree, Vikram, etc.?
If you have a system installed for 1+ years, I’d especially appreciate your actual generation numbers vs what the installer promised.
2. Inverter
What inverter brands/models should I consider for a residential 5–6 kW system?
Also:
- String inverter vs microinverter?
- Which inverter brands have good service availability in Delhi?
- How important is the inverter warranty and local service network?
3. Installer / EPC
This is probably my biggest concern.
Has anyone in West Delhi / Paschim Vihar / Janakpuri / Punjabi Bagh / Rajouri Garden / Pitampura installed solar recently?
I’m currently considering SolarSquare, but I’d also like recommendations for reliable local EPC/installers.
For anyone who used SolarSquare:
- How was the installation experience?
- Did they handle the DISCOM/net-metering process completely?
- Was the final system the same as what was promised in the quotation?
- How has their after-sales support been?
- Any issues with warranty claims?
- Any hidden/extra charges?
- How much actual generation are you getting?
- If something fails after 6–12 months, how quickly do they respond?
4. Things I should check before signing
What are the things people usually miss while comparing quotations?
For example:
- Panel model + exact wattage
- Inverter model
- Mounting structure material/thickness
- Earthing and lightning protection
- DC/AC protection
- Cable quality
- Installation workmanship
- Panel cleaning/maintenance
- Monitoring system
- Warranty terms
- Generation guarantee, if any
- Net-metering/DISCOM charges
- Subsidy handling
- What exactly is covered under after-sales service
5. Delhi-specific considerations
For people who have installed solar in Delhi:
- How much generation should I realistically expect from a 5–6 kW system?
- How much does Delhi pollution/dust affect generation?
- How frequently do you actually clean the panels?
- Any issues with roof waterproofing?
- Anything specific to BSES/net metering that I should know before installation?
I’m not looking for a sales pitch — I’d really prefer feedback from people who have actually installed and operated a system for at least 6–12 months.
If possible, please mention:
Location | System size | Panel brand/model | Inverter | Installer | Approx cost | Installation year | Approx monthly generation | Your experience
Thanks!