The sun doesn't work night shifts.
But a battery can.
Transform your rooftop solar plant into a 24/7 independent micro-grid. Store surplus daytime generation instead of exporting at low feed-in tariffs, eliminate expensive evening peak billing, and keep critical loads running seamlessly through power outages. Custom-engineered for homes, housing societies, and commercial facilities.
Energy Independence & Grid Economics
Why grid-tied rooftop solar needs a battery today.
Net-metering was designed for an earlier era. Between shrinking feed-in credits, steep Time-of-Day (TOD) peak tariffs, and frequent suburban grid trips, energy storage is the natural evolution of rooftop solar.
Grid Outages Mean Zero Solar Power
Standard grid-tied inverters are legally required to shut down immediately when the grid fails (anti-islanding protection). Without battery storage, your solar plant generates 0 kW during a blackout, even under brilliant midday sunshine.
Low Feed-In Credits vs High Evening Tariffs
Daytime solar exported back to MSEDCL earns modest feed-in credits, but evening electricity consumed from the grid is billed at higher tariff slabs. A battery lets you store your own power for free evening consumption.
Seamless Protection for Critical Loads
Voltage surges, brownouts, and unexpected grid cuts wear out expensive building equipment—such as submersible pumps, elevator drives, and refrigeration systems. A BESS provides clean, conditioned, pure sine-wave backup.
Future-Proofing Against Policy Changes
State electricity regulators are tightening net-metering banking rules and gross metering limits. Installing battery storage increases your on-site self-consumption to 85%–95%, shielding your investment from utility policy risks.
Retrofit Engineering Advantage
Don't replace your solar inverter. AC-couple it.
Many plant owners assume they must discard their working on-grid inverter to add batteries. With Solabrix's AC-coupled architecture, your existing plant remains completely untouched.
Parallel Bi-Directional Power Flow
Your existing panels and string inverter (Sungrow, Growatt, Solis, etc.) continue producing AC power at maximum efficiency.
A precision bi-directional sensor at your main incoming switchboard detects exact solar generation, consumption, and export in real time.
Surplus energy that would otherwise be exported to the grid is instantly absorbed by the storage inverter and stored in safe LFP battery cells.
During grid failure, the ATS disconnects the grid in under 20 milliseconds, forming an isolated micro-grid that powers your dedicated critical loads.
Why AC-Coupling is the Smarter Choice:
- ✓ Zero Hardware Waste: Keep your existing on-grid inverter and manufacturer warranty fully intact.
- ✓ Modular Scalability: Add 5 kWh, 10 kWh, or 30 kWh today, and easily expand capacity in the future as needs grow.
- ✓ Independent Redundancy: If either the solar inverter or the storage inverter ever requires servicing, the other continues running seamlessly.
- ✓ Flexible Physical Layout: Battery storage can be located in an indoor utility room, basement, or garage away from outdoor rooftop weather.
Chemistry & Safety
Why Lithium Iron Phosphate (LiFePO4) is the only chemistry we install.
Battery safety is paramount when installing energy storage in residential homes and shared apartment basements. We strictly specify Tier-1 LFP cells.
| Feature / Metric | Solabrix LFP (LiFePO4) | Electric Vehicle NMC | Tubular Lead-Acid |
|---|---|---|---|
| Thermal Runaway Safety | Extremely High (>270°C) Does not release oxygen; non-combustible | Moderate (~150°C) Risk of oxygen release under puncture or heat | Low / Acidic Emits explosive hydrogen gas during charging |
| Cycle Life (Lifespan) | 6,000+ Cycles 12 to 15+ years of daily cycling | 1,500 – 2,500 Cycles 5 to 7 years | 500 – 900 Cycles 2 to 3 years before replacement |
| Usable Depth of Discharge (DoD) | 90% – 95% Virtually entire rated capacity is usable | 80% – 90% | 50% Draining past 50% permanently damages cells |
| Maintenance & Space | Zero Maintenance Compact wall-mount or slim modular tower | Zero Maintenance Compact | Heavy Maintenance Distilled water top-ups, corrosive acid fumes |
Custom Engineering Assessment
Request a tailored BESS quote.
Battery storage is never one-size-fits-all. Every system depends on your existing inverter, night load profile, and critical backup priorities. Use our estimator to explore sizing, then contact us for an on-site evaluation and quote.
1 Select Plant Category
2 Existing Solar Plant Capacity
3 Primary Storage Objective
Because wiring distance, ATS requirements, switchgear protection, and sub-circuit segregation differ for every property, we do not issue generic boilerplate pricing. Contact us to schedule a site evaluation and receive a transparent turnkey quote.
Direct Consultation
Schedule your site audit & quote.
Fill in your details below, or reach out directly. We will review your plant capacity, inspect your electrical layout, and provide an engineering proposal.
Frequently Asked Questions
Everything you need to know about BESS Installation.
Clear answers regarding AC coupling, battery safety, sizing, costs, and backup capabilities.
Why doesn't my existing grid-tied solar plant work during a power outage?
By law and safety regulations (CEA and IEEE 1547 standards), all standard on-grid solar inverters must feature 'anti-islanding' protection.
The moment the utility grid fails, the inverter is forced to disconnect within milliseconds. This is critical to prevent electrocuting utility line workers repairing transmission cables down the street. Without a local battery storage system to establish a voltage and frequency reference, your solar panels cannot generate power during a blackout, even on a sunny day.
Can I add battery storage to my existing solar plant without replacing my current on-grid inverter?
Yes, absolutely. That is the core advantage of Solabrix's AC-Coupled Retrofit architecture.
We install a dedicated bidirectional storage inverter and an LFP battery bank on the AC side of your main distribution board. Your existing rooftop panels and on-grid inverter remain completely untouched. This avoids the huge waste and expense of throwing away a perfectly functioning solar inverter.
What battery chemistry does Solabrix use, and is it safe to install indoors?
Solabrix strictly installs Lithium Iron Phosphate (LiFePO4 / LFP) chemistry.
- Thermal Safety: LFP is thermally stable up to 270°C+ and does not release oxygen during thermal breakdown, eliminating runaway fire hazards common to NMC chemistry.
- Zero Fumes: Unlike tubular lead-acid batteries, LFP emits zero hydrogen gas, requires no acid handling or water topping, and operates silently.
- Indoor Safe: It is certified and safe for installation in indoor utility spaces, parking garages, or covered rooftop equipment rooms.
How much battery storage capacity (in kWh) do I actually need?
Sizing depends on your consumption and backup priorities:
- Residential Villas & Bunglows (3–7 kW Solar): A 5 kWh to 10 kWh battery bank powers essential nighttime loads (lights, fans, refrigerator, Wi-Fi, and TV) for 4 to 8 hours.
- Housing Societies & Large Bunglows (10–25 kW Solar): A 15 kWh to 30 kWh battery system covers common-area lights, security surveillance, water pumps, and critical society infrastructure.
- Commercial / Industrial (25–100 kW Solar): Sized specifically around contract demand and evening Time-of-Day (TOD) peak tariff hours.
Why is there no fixed price listed, and how does Solabrix determine my quote?
Energy storage systems cannot be priced like generic off-the-shelf commodities.
The total turnkey cost depends directly on several technical variables:
- The exact model and voltage configuration of your existing solar inverter.
- The physical distance and cabling between your AC busbar, battery rack, and main switchboard.
- Whether an Automatic Transfer Switch (ATS) is required for seamless <20ms UPS transition.
- Sub-panel wiring to isolate critical backup circuits from heavy non-essential loads.
- The specific kWh capacity and C-rate discharge capability needed.
Solabrix conducts a thorough technical assessment and provides an itemized, transparent engineering quote without hidden surprises.
How does BESS help reduce my MSEDCL electricity bill?
In Maharashtra, solar energy sent back into the grid during daytime hours earns modest feed-in credits, while electricity drawn from the grid during peak evening hours is billed at high tier rates (including TOD peak charges). By charging your battery with daytime solar and discharging it between 6:00 PM and 11:00 PM, you avoid drawing expensive peak power from the grid and maximize self-consumption value.
Which areas in Pune are covered for physical BESS installation?
Our on-ground physical site surveys, electrical engineering, and turnkey installation services are active in Bavdhan, Kothrud, Warje, Karvenagar, and Erandwane.
We are expanding to additional Pune localities. Note: SolarSaathi digital care and inverter monitoring is available across all of Pune.
What is the expected lifespan and warranty of the battery storage system?
Our Tier-1 LFP battery modules are engineered for 6,000+ full cycles at 80% Depth of Discharge. With one full cycle per day, this delivers a lifespan of 12 to 15+ years. The hardware is backed by comprehensive 5 to 10-year manufacturer warranties, and its health is continuously tracked via the Solabrix Zenith platform.
Can the BESS charge from both solar panels and the utility grid?
Yes. The intelligent storage inverter can be programmed for multiple modes. Priority #1 is always clean, zero-cost solar energy. However, during monsoon periods with continuous rain, the system can be programmed to top up the battery from the utility grid during off-peak night hours, ensuring you are never caught unprepared during outages.
What is the process to get a site evaluation and quote from Solabrix?
Getting your custom quote is simple:
- Fill out the quote inquiry form above or call our team at +91-91752-88284.
- Provide your solar plant capacity, inverter model, and a recent MSEDCL electricity bill.
- Our engineers visit your site to inspect your main distribution board, cable paths, and battery placement location.
- We present a Single Line Diagram (SLD) and a detailed, transparent turnkey quote tailored to your facility.
Ready to power through outages and eliminate peak bills?
Contact our Pune engineering team today for an on-site evaluation and custom BESS quote.