Sizing, Net Billing & Installation
Size the system to your bill, not to your roof. Under net billing your exported units earn roughly Rs 11/kWh against the Rs 23.57–48 you pay to buy, so self-consumption and storage now beat export. These guides cover the DISCO application, kW-by-kW system costs, the 40-point install checklist, solar appliances, and agricultural pumping.
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- Adding a Battery to Existing Solar: AC vs DC Coupling
Retrofitting storage is routine: AC-coupled batteries bolt onto any system, DC-coupled ones reward an inverter swap. Both architectures, and the paperwork.
Updated 17 Sept 2026 - Connecting Victron VE.Direct LoRaWAN Module to VRM Portal
Connecting the Victron VE.Direct LoRaWAN module to the VRM Portal via The Things Network.
Updated 17 Sept 2026 - Do Solar Panels Need Direct Sunlight? Shade, Explained
Panels prefer direct sun but run on any light — the enemy is partial shade, which can drag down a whole string. How shade works and how design defeats it.
Updated 10 Sept 2026 - Do Solar Panels Work at Night? What Actually Happens
No — panels need light, and moonlight is millions of times too weak. What powers a solar home after dark is the grid, net-metering credits, or a battery.
Updated 17 Sept 2026 - Do Solar Panels Work in Winter? Snow, Cold, Short Days
Cold improves panel efficiency; short days and snow cover cut production. What winter does to output, how snow slides off, and why December was already counted.
Updated 16 Sept 2026 - Do Solar Panels Work on Cloudy Days? The Real Numbers
Yes — on diffuse light, at reduced output: a mild haircut under thin cloud, a deep cut under storm. Why annual averages, not gray days, decide your economics.
Updated 16 Sept 2026 - How Are Solar Panels Made? From Sand to Rooftop
Quartz becomes polysilicon, polysilicon becomes wafers, wafers become cells, cells become the glass-and-aluminum sandwich on your roof. The chain, step by step.
Updated 16 Sept 2026 - How Do Solar Panels Work? Explained Simply
Sunlight knocks electrons loose in silicon, an inverter turns that flow into household power, and your meter does the accounting. The chain, minus the physics.
Updated 17 Sept 2026 - How Many Solar Batteries Do You Need? Size the Evening
Size storage to your evening, not your house: the kWh between sunset and sunrise for daily shifting, or essential-load runtime for backup. Both calculations.
Updated 10 Sept 2026 - How Many Solar Panels Does It Take to Power a House?
The average US home uses about 865 kWh a month, roughly 18-25 modern panels depending on your sun. The three-number method to compute your own count.
Updated 17 Sept 2026 - How Many Solar Panels for 1,000 kWh a Month?
1,000 kWh a month needs roughly a 7.5-10.5 kW system, 19 to 27 modern panels depending on your sun. The worked math, plus a table for 500 to 2,000 kWh.
Updated 17 Sept 2026 - How Many Solar Panels for a 1,000 Sq Ft House? Sizing & System Guide
Calculate solar panel count for a 1,000 sq ft home, evaluate EIA electricity consumption data, and size array kW and roof space.
Updated 18 Sept 2026 - How Many Solar Panels for a 1,500 Sq Ft House? Sizing & System Guide
Calculate solar panel count for a 1,500 sq ft home, evaluate EIA electricity consumption data, and size array kW, panel count, and roof space.
Updated 18 Sept 2026 - How Many Solar Panels for a 2,000 Sq Ft House? Sizing & System Guide
Calculate solar panel count for a 2,000 sq ft home, evaluate EIA electricity consumption data, and size array kW, panel count, and roof space.
Updated 18 Sept 2026 - How Many Solar Panels for a 2,500 Sq Ft House? Sizing & System Guide
Calculate solar panel count for a 2,500 sq ft home, evaluate EIA electricity consumption data, and size array kW, panel count, and roof space.
Updated 18 Sept 2026 - How Many Solar Panels for a 3,000 Sq Ft House? Sizing & System Guide
Calculate solar panel count for a 3,000 sq ft home, evaluate EIA electricity consumption data, and size array kW, panel count, and roof space.
Updated 18 Sept 2026 - How Many Watts Does a Chest Freezer Use? Solar Guide
Calculate chest freezer wattage, compare chest vs upright efficiency, evaluate manual defrost energy savings, and size off-grid solar and battery storage.
Updated 18 Sept 2026 - How Many Watts Does a Dehumidifier Use? Solar Guide
Calculate dehumidifier wattage, compare portable vs ducted units, manage basement humidity levels, and size off-grid solar panels and battery storage.
Updated 18 Sept 2026 - How Many Watts Does a Dishwasher Use? Solar Guide
Calculate dishwasher wattage across wash and heating cycles, evaluate water and energy efficiency, and size home solar and battery storage systems properly.
Updated 18 Sept 2026 - How Many Watts Does a Dryer Use? Solar Sizing Guide
Calculate clothes dryer wattage, compare standard electric vs heat pump efficiency, evaluate solar inverter capacity, and size battery storage correctly.
Updated 18 Sept 2026 - How Many Watts Does a Pool Pump Use? Solar Sizing Guide
Calculate pool pump wattage, compare single-speed vs variable-speed affinity laws, cut filtration runtime, and size a dedicated solar system properly.
Updated 18 Sept 2026 - How Many Watts Does a Sump Pump Use? Solar Sizing Guide
Calculate sump pump wattage, evaluate running vs starting surge power, examine battery backup systems, and size emergency solar power for storm resilience.
Updated 18 Sept 2026 - How Many Watts Does a TV Use? Solar Sizing Guide
Calculate TV wattage by screen size, evaluate UHD 4K and refresh rate draw, minimize sleep mode vampire loads, and size solar panels and battery backup.
Updated 18 Sept 2026 - How Many Watts Does a Washing Machine Use? Solar Guide
Calculate washing machine wattage, compare front-load vs top-load efficiency, optimize cold wash cycles, and size off-grid solar and battery storage.
Updated 18 Sept 2026 - How Many Watts Does a Water Heater Use? Sizing Guide
Calculate electric water heater wattage, compare hybrid heat pump vs resistance efficiency, evaluate installation space, and size solar and battery storage.
Updated 18 Sept 2026 - How Many Watts Does a Window AC Use? Sizing Guide
Calculate window AC power requirements from 5,000 to 34,000 BTU, understand variable-speed inverter savings, and size solar panels and batteries accurately.
Updated 18 Sept 2026 - How Many Watts Does an Electric Oven Use? Sizing Guide
Calculate electric oven and range wattage, compare induction vs radiant efficiency, check circuit requirements, and size solar inverters and battery backup.
Updated 18 Sept 2026 - How Many Watts Does an EV Charger Use? Sizing Guide
Calculate EV charger wattage across Level 1 and Level 2, evaluate standby power draw, compare charging rates, and size a dedicated home solar system.
Updated 18 Sept 2026 - How Many Watts Does an RV AC Use? Solar Sizing Guide
Calculate RV air conditioner wattage, evaluate running vs starting surge amps, examine soft starters, and size off-grid solar inverters and battery banks.
Updated 18 Sept 2026 - How Much Energy Does a Solar Panel Produce Per Day?
A modern 400 W panel yields roughly 1.3-1.6 kWh a day averaged over the year. The derivation from peak sun hours, the losses, and how to get your number.
Updated 17 Sept 2026 - IronRidge BOSS Structural Splice Guide: Tool-Free Bonding and Span Rules
IronRidge BOSS splice guide: tool-free bonded structural splice for XR rails, UL 2703 equipment bonding, 1" expansion gap, and no cantilever restrictions.
Updated 18 Sept 2026 - IronRidge CAMO Hidden End Clamp Guide: Invisible Fastening and Coastal Rules
IronRidge CAMO guide: invisible tool-free end clamp for 99% of panels, 90-degree cam lock, flush rail aesthetics, and coastal saltwater exclusion rules.
Updated 18 Sept 2026 - IronRidge FlashFoot2 Roof Mount Guide: Flashing, Sealing, and Concentric Loading
IronRidge FlashFoot2 guide: 3-tier water seal raised 1 inch, concentric lag loading, 7/16" socket, TAS-100 wind-driven rain testing, and 2:12 to 12:12 slopes.
Updated 18 Sept 2026 - IronRidge UL 3741 Rapid Shutdown Guide: Photovoltaic Hazard Control Without MLPE
IronRidge UL 3741 guide: Photovoltaic Hazard Control without MLPE up to 600V, NEC 690.12(B)(2), Tesla MCI-1 and Solis inverters, and UL 1565 wire routing.
Updated 18 Sept 2026 - IronRidge XR Rails Buying Guide: XR10, XR100, and XR1000 Structural Comparison
IronRidge XR rails guide: compare XR10, XR100, and XR1000 spans up to 12 feet, 6000-series aluminum alloy, ASCE 7-16 wind ratings, and UL 2703 bonding.
Updated 18 Sept 2026 - kW vs kWh in Solar: The Difference That Decodes Every Quote
kW is speed, kWh is distance: one rates the machine, the other fills your bill. Master both units and every quote, battery spec and utility tariff reads itself.
Updated 16 Sept 2026 - Off-Grid Solar Systems: The Complete Starter Guide
Off-grid means the battery IS the grid: panels oversized for December, storage sized for cloudy streaks, loads that fit the budget. Architecture and trade-offs.
Updated 16 Sept 2026 - RV Solar Power: The Guide to Sun-Powered Boondocking
RV solar is a small off-grid system on wheels: 12/24-volt house banks, roof or portable panels, a load budget in camp days. Sizing tiers and the pre-wire trap.
Updated 10 Sept 2026 - S-5! MLPE Mount for Metal Roof Solar: Microinverter and Optimizer Setup
Installation guide for S-5! MLPE Mount on rail-less metal roofs. Learn how to mount microinverters and optimizers under 3 lbs to module flanges.
Updated 18 Sept 2026 - S-5! ProteaBracket Trapezoidal Metal Roof Mount: Installation and Technical Guide
Technical installation guide for S-5! ProteaBracket on trapezoidal and IMP roofs. Covers adjustable base geometry, factory EPDM seal, and UL 2703.
Updated 18 Sept 2026 - S-5! PVKIT Rail-Less Metal Roof Solar Mounting: Engineering and Installation Guide
Engineering guide to S-5! PVKIT 2.0 rail-less solar mounting on metal roofs. Learn UL 2703 bonding rules, purlin clip spacing, and metal compatibility.
Updated 18 Sept 2026 - S-5! PVKONCEAL Solar Module Skirt: Aesthetics and Pest Protection Guide
Architectural guide to S-5! PVKONCEAL module skirts for rail-less solar. Covers PVDF black finish, dual frame thickness (30-46 mm), and critter guards.
Updated 18 Sept 2026 - S-5! RibBracket for R-Panel & PBR Metal Roofs: Engineering and Sizing Guide
Engineering guide to S-5! RibBracket for R-Panel and PBR-Panel metal roofs. Covers slotted M8 alignment, EPDM reservoir gasket, and crown mounting.
Updated 18 Sept 2026 - S-5! SolarFoot Exposed-Fastener Metal Roof Mount: Specifications and Installation
Technical guide to S-5! SolarFoot for exposed-fastener metal roofs. Details factory butyl sealant, ASTM E2140 water testing, UL 2703, and L-foot setup.
Updated 18 Sept 2026 - Setting up Your Victron VE.CAN Resistive Tank Sender Adapter
Setup and calibration of the Victron VE.Can Resistive Tank Sender Adapter for marine and RV applications.
Updated 17 Sept 2026 - SnapNrack FlashBox: Flashing-Integrated Rooftop Junction Box Guide
Engineering guide to SnapNrack FlashBox rooftop junction box. Learn integrated flashing, Racetrack seal, attic conduit pass-through, and code compliance.
Updated 18 Sept 2026 - SnapNrack Junction Box XL: Rail and Composition Roof Mount Guide
Engineering guide to SnapNrack Junction Box XL for rail and roof mounting. Learn SpeedSeal+ comp mounts, wire transitions, and weatherproofing.
Updated 18 Sept 2026 - SnapNrack OmniLug: Grounding Lug and MLPE Rail Mount Guide
Technical guide to SnapNrack OmniLug (USA) grounding and MLPE mount. Learn copper wire cradle divots, single-purpose rule, and domestic content credits.
Updated 18 Sept 2026 - SnapNrack Series 200 Ground Mount Solar System: Engineering Guide
Engineering guide to SnapNrack Series 200 Ground Mount solar system. Learn 1.5-inch Schedule 40 pipe substructure, Hollaender fittings, and 0-45 degree tilt.
Updated 18 Sept 2026 - SnapNrack TopSpeed Universal Railless Solar Mounting: Engineering Guide
Engineering guide to SnapNrack TopSpeed Universal railless mounting. Learn 4-component architecture, 30-40mm clamps, and one-person roof installs.
Updated 18 Sept 2026 - SnapNrack Ultra Rail Adjustable Tile Hook: Roof Mount Guide
Engineering guide to SnapNrack Ultra Rail Adjustable Tile Hook. Learn universal flat/S/W tile compatibility, direct-to-decking mounting, and flashings.
Updated 18 Sept 2026 - SnapNrack Ultra Rail Tilt Mount for Flat Roofs: Engineering Guide
Engineering guide to SnapNrack Ultra Rail Tilt System for flat roofs. Learn fixed tilt from 5 to 30 degrees, OmniBase standoffs, and Simple Tilt.
Updated 18 Sept 2026 - SnapNrack Ultra Rail UR-45 Mounting System: Engineering and Installation Guide
Engineering guide to SnapNrack Ultra Rail UR-45 mounting. Learn open-channel wire management, snap-in brackets, internal splices, and domestic content.
Updated 18 Sept 2026 - SnapNrack UltraFoot and DeckAnchor: Shingle Roof Solar Mount Guide
Engineering guide to SnapNrack UltraFoot and DeckAnchor 2.5 mounts. Learn rafter vs deck fastening, SpeedSeal waterproofing, and code compliance.
Updated 18 Sept 2026 - SnapNrack Umbrella Seal Flashing and L-Foot Mount: Technical Guide
Technical guide to SnapNrack Umbrella Seal flashing and L-Foot mounts. Learn elevated cone flashing, 4-inch Umbrella Lag, and shingle waterproofing.
Updated 18 Sept 2026 - SnapNrack Universal Conduit Mount and Supports: Technical Guide
Technical guide to SnapNrack Universal Conduit Mounts. Learn 3/4-inch and 1-inch EMT/PVC support, tile hook-over mounts, and SpeedSeal+ bases.
Updated 18 Sept 2026 - SnapNrack Universal Wire Clamp and Retention Clip: Technical Guide
Technical guide to SnapNrack Universal Wire Clamp R and Retention Clips. Learn rail-channel wire retention, homerun routing, and NEC 690.31 compliance.
Updated 18 Sept 2026 - Solar Carports: Shade That Charges Your Car
A solar carport is a ground-mount wearing a useful hat: perfect orientation, EV charging underneath, no roof penetrations — at a structural price premium.
Updated 10 Sept 2026 - Solar Panel Size and Weight: What Fits on Your Roof
A residential panel runs about 5.5-6.5 by 3.5 feet and 40-50 pounds; arrays load a roof at 3-4 pounds per square foot. The numbers that decide what fits.
Updated 17 Sept 2026 - Solar Without a Battery: Does It Still Make Sense?
Most American solar homes run battery-free — the grid handles nights, net metering handles the accounting. Where that works, where it leaks, and its one limit.
Updated 17 Sept 2026 - Troubleshooting the Victron VE.Bus to VE.Can Interface Setup
Installation and configuration of the Victron VE.Bus to VE.Can interface module.
Updated 10 Sept 2026 - Victron BYD B-Box Installation Guide
Installation and setup steps for integrating BYD B-Box batteries with Victron systems.
Updated 16 Sept 2026 - Victron Changing NMEA2000 Instances on VE.CAN Devices
Troubleshoot NMEA 2000 instance conflicts on Victron VE.Can devices. Learn to change device, data, and fluid instances using a GX device or Actisense NMEA R...
Updated 10 Sept 2026 - Victron Fronius AC Coupling Integration Guide
Integrate Victron and Fronius PV inverters for AC coupling. Learn compatible models, essential settings, and troubleshooting for frequency lock issues.
Updated 17 Sept 2026 - Victron GX Product Range: Monitoring and Control with Venus OS
Overview and configuration of Victron GX devices running Venus OS.
Updated 16 Sept 2026 - Victron Hub4 Grid Parallel System Integration
Troubleshoot Victron Hub-4 grid-parallel system issues, including charging and discharging faults. Understand key settings and learn why Victron recommends E...
Updated 10 Sept 2026 - Victron Marine NMEA 2000 Integration Guide
Comprehensive guide to integrating Victron Energy systems with NMEA 2000 marine networks.
Updated 17 Sept 2026 - Victron MPPT Solar Charger Error Codes: Troubleshooting Guide
Troubleshoot Victron MPPT solar charger error codes. Identify common faults like high battery temperature, sensor failures, and overcurrent conditions with s...
Updated 17 Sept 2026 - Victron VE.Bus Error Codes: Troubleshooting MultiPlus and Quattro Systems
Troubleshoot common Victron VE.Bus error codes 1, 2, and 3 on MultiPlus and Quattro inverters: causes and fixes.
Updated 10 Sept 2026 - Victron VE.Bus Parallel and Three-Phase Systems: Setup and Troubleshooting
Wiring and configuring Victron MultiPlus and Quattro inverters for parallel, split-phase, and three-phase operation.
Updated 17 Sept 2026 - Victron VE.CAN NMEA2000 Instances: Changing Device and Data Settings
Changing NMEA2000 data instances and device instances on Victron VE.Can networks.
Updated 17 Sept 2026 - Victron VE.CAN PGN Definitions Explained
Technical reference for Victron VE.Can NMEA2000 switch bank PGN definitions.
Updated 10 Sept 2026 - Victron VE.CAN Resistive Tank Sender Adapter Troubleshooting
Troubleshoot your Victron VE.Can Resistive Tank Sender Adapter. Learn to diagnose wiring, configuration, and VE.Can network issues for accurate tank level m...
Updated 10 Sept 2026 - Victron Venus OS Root Access: How to Enable SSH
How to enable and use root access on Victron Venus OS for GX devices.
Updated 10 Sept 2026 - Victron VRM Alarms Monitoring and Troubleshooting
Troubleshoot common Victron VRM Portal alarms like 'No data', 'VE.Bus Error', and 'Data from unauthenticated device'. Learn to configure automatic and user-...
Updated 10 Sept 2026 - Victron VRM Dashboard Setup: Troubleshooting and Customization
Troubleshoot common issues with your Victron VRM Dashboard, including slow data and unavailable controls, and learn to customize key settings.
Updated 17 Sept 2026 - Victron VRM Remote Firmware Update Troubleshooting
Troubleshoot issues with remote firmware updates for Victron Energy devices using the VRM Portal, covering common errors, compatibility, and required settings.
Updated 10 Sept 2026 - What Can a 10 kW Off-Grid Solar System Run? Whole-Home Guide
Discover what a 10 kW off-grid solar system can run, including whole-house heat pumps, 240V well pumps, Level 2 EV charging, and battery sizing.
Updated 18 Sept 2026 - What Can a 1200-Watt Solar System Run? Off-Grid Sizing Guide
Discover what appliances a 1,200-watt solar array can power in an off-grid cabin or RV, including mini-splits, refrigeration, and battery bank requirements.
Updated 18 Sept 2026 - What Can a 2000-Watt Solar System Run? Cabin & RV Guide
Learn what a 2,000-watt solar system can power, from 8,000 BTU room air conditioners to kitchen appliances, inverter sizing, and battery requirements.
Updated 18 Sept 2026 - What Can a 3000-Watt Solar System Run? Cabin & RV Guide
Explore what a 3,000-watt solar array powers in an off-grid cabin, from 12,000 BTU mini-splits and well pumps to dishwashers and battery sizing.
Updated 18 Sept 2026 - What Can a 400-Watt Solar System Run? Complete Sizing Guide
Discover exactly what a 400-watt solar system can run, daily watt-hour output, battery bank pairing, inverter requirements, and mobile van load limits.
Updated 18 Sept 2026 - What Can a 5000-Watt Solar System Run? Off-Grid Homestead Guide
Discover what a 5,000-watt off-grid solar array can run, including multi-zone mini-splits, heat pump dryers, Level 1 EV charging, and battery sizing.
Updated 18 Sept 2026 - What Can an 800-Watt Solar System Run? Cabin & RV Guide
Calculate what an 800-watt solar system runs daily, from EnergyStar chest freezers to Starlink terminals, with inverter and battery sizing criteria.
Updated 18 Sept 2026 - What Direction Should Solar Panels Face? (And Why West Wins Sometimes)
South maximizes total production in the US, but west-facing panels earn more per kWh under time-of-use rates and net billing. When the compass answer changes.
Updated 17 Sept 2026 - When Is the Best Time to Install Solar Panels?
Season, market cycle and policy calendar all point the same way: install ahead of summer, quote in the slow season, and stop waiting for a federal credit.
Updated 17 Sept 2026
Run the numbers
Start here
New to this? Read these three, in order.
- Adding a Battery to Existing Solar: AC vs DC Coupling
Retrofitting storage is routine: AC-coupled batteries bolt onto any system, DC-coupled ones reward an inverter swap. Both architectures, and the paperwork.
- Connecting Victron VE.Direct LoRaWAN Module to VRM Portal
Connecting the Victron VE.Direct LoRaWAN module to the VRM Portal via The Things Network.
- Do Solar Panels Need Direct Sunlight? Shade, Explained
Panels prefer direct sun but run on any light — the enemy is partial shade, which can drag down a whole string. How shade works and how design defeats it.