01
Solar PV Modules
Generate DC electricity from sunlight.
View requirements
Standalone Solar With Battery Backup
Off-Grid Solar System For Independent Power
Build a standalone solar plant with panels, charge control, inverter and batteries for homes, farms, remote sites and backup-critical loads where grid supply is weak or unavailable.
- Grid Independent
- Battery Backup
- Critical Load Planning
- Remote Site Ready
Design snapshot
01
Critical load list
02
Solar generation target
03
Battery autonomy
04
Inverter surge capacity
05
Safety handover pack
What it means
Solar power that does not depend on the grid
Off-grid solar is a standalone power plant. Solar panels charge batteries through a controller or hybrid inverter, and the inverter powers selected AC loads. The system is sized by load, battery autonomy and sunlight availability, not only by monthly bill.
Best choice when backup reliability is more important than exporting extra solar units to the electricity grid.
Primary goal
Backup reliability
Design basis
Load + autonomy
Farm Houses
Reliable power where grid supply is weak or unavailable.
Lights, fans, pump controls, Wi-Fi
Rural Homes
Day and night solar backup for daily essential loads.
1 kW to 5 kW typical
Remote Offices
Power computers, routers, CCTV and communication loads.
Custom autonomy planning
Clinics & Schools
Backup for lights, fans, devices and emergency equipment.
Priority-load design
Telecom / CCTV Sites
Long-duration power for low-load high-uptime systems.
Lithium battery preferred
Backup-Critical Homes
For users who value independence more than bill export.
No net metering required
System architecture
Off-grid power flow, from sunlight to essential backup.
Panels, charge control, battery storage and selected circuits work together to deliver practical backup hours.
Power path
Generate, store, then supply only the loads that matter.
Off-grid design is built around appliance priority, safe battery charging and usable backup hours.
Generate
Protect
Backup
01
Sunlight
Available solar energy
02
Solar Panels
DC power generation
03
Charge Control
Safe battery charging
04
Battery Bank
Stored backup power
05
Essential Loads
Priority AC supply
DC side
Panels and charge control
Storage
Battery bank and BMS
AC side
Inverter to selected loads
Load first
Essential appliances are separated
Safe charging
Controller and protection are planned
Usable backup
Battery runtime is calculated
Clean output
Inverter serves selected circuits
Note: Heavy appliances such as AC, pumps and compressors need separate surge-load planning before final battery and inverter sizing.
What is included
Off-grid solar components
Each component is selected around your load profile, backup hours, safety requirements and site conditions.
02
Solar Charge Controller
Regulates charging and protects the battery bank.
View requirements03
Off-Grid Inverter
Converts stored DC power into usable AC power.
View requirements04
Battery Bank
Stores energy for night use and cloudy periods.
View requirements05
Mounting Structure
Holds modules at a strong, shade-aware angle.
View requirements06
ACDB / DCDB Protection
Adds fuses, MCBs, isolators and surge protection.
View requirements07
Earthing & Lightning Arrester
Protects people, equipment and electronics.
View requirements08
Monitoring System
Tracks generation, battery state and system health.
View requirementsBattery sizing
Backup sizing starts with real appliance usage.
Battery capacity is planned around autonomy, depth of discharge, inverter efficiency, surge loads and priority circuits.
1
Use first
Appliance Load Calculator
Add appliance wattage, quantity and daily running hours.
2
Use next
Battery Backup Calculator
Choose backup hours, battery type, voltage and operating limits.
Start with the load calculator. Use the battery calculator only after your essential load is known.
1
List every appliance with wattage and daily running hours.
2
Separate critical loads from comfort loads before sizing.
3
Decide backup duration: 4 hours, overnight, 1 day or 2 days.
4
Choose battery chemistry: lithium for premium life, lead-acid for lower upfront cost.
5
Add safety margin for cloudy weather, battery ageing and future load growth.
6
Verify inverter surge capacity for pumps, compressors and motor loads.
System guide
Typical off-grid system planning
System size is finalized only after load audit, backup duration and inverter surge requirement.
| System Size | Suitable Use | Planning Note |
|---|---|---|
| 1 kW | Small essential backup | Lights, fans, phone charging, router |
| 2 kW | Small home backup | Essential load plus TV and efficient appliances |
| 3 kW | Medium home / office | Daytime work loads with planned night backup |
| 5 kW | Large home / farm house | Higher comfort loads with larger battery bank |
| 10 kW+ | Institution / remote facility | Designed after detailed load and autonomy study |
Small
1-2 kW
Home
3-5 kW
Facility
10 kW+
Note: Battery capacity changes significantly when AC, pump, compressor or motor loads are included.
Final sizing should always be confirmed after appliance wattage, runtime and surge demand are checked.
Document checklist
Required documents and project records
Off-grid solar usually needs fewer DISCOM documents than on-grid solar, but it needs better technical documentation because battery and load sizing determine performance.
Customer KYC
Aadhaar / PAN or company ID
Mobile number and email
Billing name and installation address
Site & Ownership
Property ownership proof or NOC
Roof / land photos
Available installation area and access route
Load Assessment
Appliance list with wattage
Daily usage hours
Critical load priority list
Existing inverter/UPS details if any
Electrical Inputs
Latest electricity bill if grid exists
Sanctioned load if available
Single-line wiring information
Earthing availability
Project Records
Site survey report
Shadow analysis
System design and battery autonomy sheet
Quotation and scope of work
Handover Pack
Tax invoice
Warranty cards
Datasheets for panels, inverter and batteries
Commissioning report and maintenance guide
Compliance and safety
Documents, safety checks and handover proof in one place
Every off-grid proposal should clearly record load sizing, battery autonomy, SLD, datasheets, warranty cards, commissioning report and O&M guidance.
Design proof
Load sheet + SLD
Safety proof
DBs + earthing
Handover proof
Warranty + O&M
01
Module Quality
Use certified modules and verify datasheets, serial numbers and warranty terms.
View requirements
02
Battery Safety
Ventilation, clearance, BMS protection and correct cable sizing are checked.
View requirements
03
DC Protection
DC isolator, fuse, polarity check and surge protection are included.
View requirements
04
Earthing System
Equipment earth and lightning protection are planned for safer operation.
View requirements
05
Load Segregation
Heavy loads are separated so essential backup remains stable.
View requirements
06
Commissioning Report
Voltage, charging, inverter output and backup behavior are tested.
View requirements
System comparison
Which solar setup fits the job?
Off-grid is selected when backup and independence matter more than grid export.
| Feature | Off-Grid Solar | On-Grid Solar | Hybrid Solar |
|---|---|---|---|
| Grid dependency | Works without grid | Needs active grid | Uses grid plus battery |
| Battery | Required | Not required | Required |
| Best purpose | Energy independence | Bill savings | Savings plus backup |
| Net metering | Usually not needed | Usually required | Depends on design |
| Upfront cost | Higher due to batteries | Lowest | Medium to high |
| Night power | From battery | From grid | Battery then grid |
Note: Hybrid solar is best when the site needs both net-metering benefit and battery backup. Pure off-grid is best where grid supply is unavailable or unreliable.
Installation process
From survey to handover
1
Consultation
2
Load Audit
3
Site Survey
4
Battery Autonomy Design
5
Quotation & Scope Lock
6
Material Dispatch
7
Installation
8
Testing & Commissioning
9
Customer Handover
10
Maintenance Support
Source-informed notes
What we verify before final proposal
Off-grid solar is not only a panel package. We verify quality, safety, battery backup and service scope before recommending the final system.
Quality standards
Panels, batteries, inverters and protection devices are checked against manufacturer datasheets and applicable Indian/IEC safety practices.
No false subsidy promise
Off-grid systems generally do not follow the same route as grid-connected net-metered rooftop subsidy. We confirm eligibility before committing.
Backup expectation
Runtime is calculated from watt-hours, usable battery capacity and inverter losses, then explained in plain language.
Service planning
The handover includes maintenance guidance for cleaning, battery health, ventilation, alarms and shutdown procedure.
Final recommendation is made only after site condition, appliance list, battery autonomy and warranty scope are checked together.
Equipment proof
Datasheets + serial register
Design proof
Load sheet + approved SLD
Test proof
Commissioning readings
Ownership proof
Invoice + warranty pack
Off-grid solar proposal
Get a site-specific battery solar quote
Share your appliance list, location and backup-hour expectation. AR Saurtech Energy will map panel capacity, inverter size, battery bank, safety scope and handover documents.
Appliance load and daily usage review
Battery autonomy and surge load planning
Roof or ground-mount feasibility check
Transparent quotation with battery and warranty scope
Survey
Load + site check
Design
Panels + battery
Handover
Warranty + O&M
FAQs
What is an off-grid solar system?+
It is a standalone solar power system that stores electricity in batteries and can run selected loads without depending on the utility grid.
Is off-grid solar eligible for net metering subsidy?+
Most residential rooftop subsidy and net metering processes are designed for grid-connected systems. Off-grid eligibility depends on the current scheme, location and use case, so we verify before quoting.
Can off-grid solar run AC or heavy motors?+
Yes, but only with correct inverter surge capacity, battery capacity and solar sizing. Heavy loads increase cost, so we separate essential and non-essential loads first.
Which battery is better for off-grid solar?+
Lithium batteries are premium, compact and deeper-discharge friendly. Lead-acid batteries can reduce upfront cost but need more space and stricter maintenance.
How much backup can I get?+
Backup depends on battery capacity, load size and usage hours. A proper design starts with an appliance-by-appliance load sheet.
Does off-grid solar need maintenance?+
Yes. Panels need cleaning, cable/protection checks should be periodic, and batteries need health monitoring as per manufacturer guidance.
Plan your independent power system
Get an off-grid solar design with battery backup calculation
Share your appliance list, site location and expected backup hours. Our team will prepare a practical system recommendation with required documents, material scope and maintenance plan.
Note: Final backup depends on load, battery chemistry, sunlight, installation area and customer usage pattern.
Heavy appliances such as AC, pumps and compressors are sized separately for safe surge capacity.
We recommend a final site survey before locking battery size, inverter rating and protection scope.