Calculate your complete solar power system in less than one minute — panels, battery bank, inverter and total cost, sized precisely to your electricity usage.
Tell us how you use electricity — we handle the engineering. Redsom's sizing engine cross-checks panel output, battery autonomy, inverter headroom and cable ratings in real time.
Input your daily kWh, monthly bill, or list your appliances — the live readout updates as you type.
Our engine calculates panels, battery bank, inverter, MPPT controller and cabling to match your load and location's sun hours.
Get a professional PDF quotation with full cost breakdown, savings projection and CO₂ impact — shareable on WhatsApp or email.
Residential, commercial, industrial or fully off-grid — the calculator adapts to your electricity source, backup requirements and roof type, then recommends the precise equipment list and price.
5.0 kW array · 30 kWh/day
20.5 kWh usable · 24h backup
MPPT 150A controller included
Redsom Solar handles design, procurement, installation and long-term maintenance across residential, commercial, industrial and off-grid projects.
Rooftop systems sized to your household's exact daily consumption.
Reduce operating costs with hybrid systems for offices and retail.
High-capacity arrays and battery banks for factories and warehouses.
Solar-powered pumping for farms, boreholes and irrigation.
Standalone solar street and security lighting with smart controllers.
Scheduled cleaning, inspection and battery health monitoring.
On-site engineer visit to confirm roof suitability and shading.
Free technical consultation before you commit to a system.
Every recommendation from our calculator is grounded in real sizing standards — not guesswork — and backed by a team that installs and services what it sells.
Explore Our ServicesEvery design is reviewed by a licensed solar engineer before installation.
Tier-1 panels, LiFePO₄ batteries and hybrid inverters with real warranties.
Monitoring and technical support for the life of your system.
See equipment and installation costs broken down — no hidden fees.
It depends on your daily electricity usage and your location's average sun hours. Our calculator divides your daily kWh need by your local sun hours and panel efficiency to size the array automatically — most homes need between 6 and 16 panels.
Lithium (LiFePO₄) batteries offer the longest lifespan and deepest usable discharge, making them the best value over time. Gel and AGM batteries cost less upfront but need more capacity for the same backup time.
Lithium battery banks typically last 10–12 years with proper use, while Gel, AGM and lead-acid batteries generally last 4–6 years depending on depth of discharge and climate.
Yes — a fully off-grid system uses a larger battery bank sized for your full daily load plus autonomy margin, with no dependency on the utility grid at all.
Installation cost scales with system size and roof complexity. Use the calculator for an instant estimate, or request a free site survey for an exact quote.