From sunshine on your roof to savings on your bill.
Our patented SPDU sits in your meter room and shares one roof's solar power between every flat, shop and office in the building. Fairly, automatically, every single day.
Four steps from first visit to free units
You approve the plan and we do the rest. Here is what actually happens between our first visit and your first solar-powered bill.
We visit your building, free of cost
Our team studies your roof, measures the shadow-free area and checks what your building can generate. You get an honest assessment with no obligation.
We design the system and handle the paperwork
We prepare a design and a clear proposal for your society to approve. Then we handle all the paperwork with the DISCOM, the electricity company. You sign, we run around.
We install without touching your homes
Panels go up on a raised structure and the SPDU goes into the meter room. The whole job takes about 3 months, with no wiring changes inside any home.
Every home tracks its own share
From day one, each family sees its solar share on the Nova app. How much the sun gave you today, and how much you saved this month.
One roof. Every home gets its fair share.
The hardest question in shared solar is a simple one. Who gets the power? Our answer is the same one your society already trusts.
Think of your society's water tank
One shared tank sits on the roof, yet every home gets its own fair, metered supply. Nobody fights over water because the sharing is built into the plumbing.
Rooftop solar works the same way with Protostar. One shared roof full of panels, and the SPDU in the meter room quietly gives every home its fair, metered share of the sunshine. When your share is used, the grid takes over automatically.
Your own metered share
The SPDU gives every flat, shop and office its own measured share of the solar power. Nobody can use up someone else's units.
Sunshine runs your meter first
Whenever the sun is out, your home draws from its solar share before it takes anything from the grid. Free units get used first.
The grid takes over automatically
When your share is used up, or at night, power switches to the grid on its own. No flicker, no button to press. You never notice the change.
The SPDU
Available in 1-phase and 3-phase models
One small box that makes shared solar possible
The Smart Power Distribution Unit is our patented device. Here is what it does for your building, in plain words.
Sits in the meter room
The SPDU installs next to your existing meters. Nothing changes inside any home, and no resident needs to be present.
Shares the solar fairly
Every flat, shop and office gets its own metered share of the rooftop solar. The sharing is automatic and transparent.
Switches to grid seamlessly
When a home finishes its solar share, or when the sun sets, power comes from the grid without a flicker.
Built for Indian conditions
Designed and patented in India. It handles our summers, monsoons and voltage swings, year after year.
Panels go on a raised east-west structure
We do not lay panels flat on your terrace. They sit on a raised structure that turns the space below into a shaded, usable rooftop for your society. And because the panels face east and west, we can fit far more of them on roofs with water tanks, lift rooms and odd shapes.
Usable shade
The roof below the panels becomes a cool, shaded space for residents.
50-90% more panels
The east-west layout fits far more capacity on complex roofs.
A real deck under our raised panels
SPDUs installed in a real meter room
See your solar balance like a prepaid recharge
Every resident gets the Nova app. It shows your share of the roof's sunshine the same way your phone shows your data balance. Simple, live and yours.
Your solar balance at a glance
Open the app and see how many free units the sun has given you, how many you have used, and how many are left this month.
Alerts that matter
Get a nudge when your solar share is running low, or if something on the roof needs attention. No surprises on the bill.
One dashboard for the committee
Society office bearers see the whole building in one place. Total generation, total savings and every unit's share.
Runs itself every month
Solar shares reset automatically each month and the records keep themselves. The committee never has to do sums by hand.
Works from anywhere
Check your home's solar from the office, your hometown or abroad. If you have the app, you have the answer.
Fine control when you need it
Our team can adjust limits, schedules and settings remotely. Most fixes happen without a technician visiting your building.
We build it. Then we keep it running.
Solar is a 25-year relationship, not a one-time purchase. We stay responsible for your system long after the installation photos are taken.
We build it, end to end
From the first site visit to the final switch-on, one team handles everything. You approve the plan and we take care of the rest.
- System design and engineering for your specific roof
- Society presentations and approval support
- All paperwork with the DISCOM, the electricity company
- Installation, testing and handover in about 3 months
We keep it running for years
Panels produce power for 25 years, but only if someone looks after them. Dust alone can cut generation by up to 25%. So we stay on.
- Regular panel cleaning on a fixed schedule
- Round-the-clock remote monitoring of every unit's output
- Quick repairs before small issues become big ones
- Performance reports your committee can actually read
For Engineers and Consultants
The plain talk ends here. This section is for MEP consultants, system integrators and the technical members of your committee who want the exact numbers.
Microcontroller
ARM Cortex-M3
32-bit MCU for real-time energy monitoring and control
Communication
RS485 / Modbus RTU
Industrial-grade serial bus for reliable meter communication
Voltage Range
180-260V AC
Wide input range supporting both single and three-phase
Metering Accuracy
Class 1.0
IEEE-754 floating point precision for energy measurements
Operating Temp
-10°C to 55°C
Designed for Indian climate conditions year-round
Protection
IP20 / DIN Rail
Standard meter room mounting with surge protection
Electrical
- Input Voltage
- 180-260V AC (1φ) / 300-480V AC (3φ)
- Max Current
- 63A
- Frequency
- 50Hz / 60Hz
- Power Measurement
- Active, Reactive, Apparent
- Energy Accuracy
- Class 1.0 (IEEE-754)
Communication
- Serial Interface
- RS485 (Modbus RTU)
- Baud Rate
- 9600 / 115200 bps
- Cloud Protocol
- MQTT over TLS 1.3
- API
- RESTful HTTPS
- Real-time
- WebSocket push
Security
- Transport
- TLS 1.3 encryption
- Authentication
- Certificate-based + JWT
- Data at Rest
- AES-256 encryption
- Access Control
- Role-based (RBAC)
- Audit
- Full operation logging
End-to-End System Architecture
The complete, secure, real-time data pipeline from the panels on the roof to the Nova app in your hand.
Solar Panels
Rooftop PV array
SPDU Hardware
Distribution & metering
USR Gateway
RS485 ↔ WiFi/MQTT
MQTT TLS Broker
Encrypted cloud messaging
Edge Functions
Serverless processing
Cloud Platform
Nova dashboard & API
Ready to see it on your own roof?
Book a free site visit. Our team will study your roof, answer your committee's questions and give you a clear proposal. No obligation, no pressure.
Already a resident? Open the Nova platform