Solar Panel Size Calculator for Tiny Homes

Quick Answer

Tiny homes with a full appliance load need 1300W of solar and a 500Ah battery bank at 24V. Daily consumption runs 4.0 kWh, requiring 2-day autonomy storage. The EcoFlow Delta 2 handles tiny home loads reliably. A ground-mounted 4x 400W panel array with a 60A MPPT charge controller is the standard permanent tiny home solar setup.

Pre-Calculated System Specs

Based on 5 peak sun hours, 2-day autonomy, and typical Tiny Home loads.

ComponentMinimum SizeNotes
Daily Load4.0 kWhRaw before system losses
Adjusted Load4.8 kWh+20% system loss buffer
Solar Panels1300W7x 200W or 4x 400W panels
Battery500Ah at 24VLiFePO4, 2-day autonomy (11.9 kWh total)
Charge Controller70A MPPTNEC 1.25x safety factor applied
Inverter3000W continuous2500W surge capacity, pure sine wave

Want to adjust for your exact appliances? Customize these numbers with our solar calculator

Recommended Turnkey Solution

EcoFlow Delta 2

2,048Wh capacity, 1,800W AC output — handles a fridge, TV, microwave, and most RV loads.

2,048Wh

Capacity

1,800W

AC Output

500W

Max Solar In

Buy on EcoFlow.comView Solar Bundle

DIY Component Approach

Prefer to build a custom system? Use these components matched to the calculated specs above. A DIY build typically costs 20-35% less than a turnkey power station for the same energy capacity.

Solar Panels

1300W total (7x 200W panels recommended)

Renogy 200W 12V Monocrystalline on Amazon

Battery

500Ah at 24V LiFePO4

LiTime 12V 200Ah LiFePO4 on Amazon

Charge Controller

70A MPPT minimum

Renogy 40A MPPT Rover on Amazon

Inverter

3000W pure sine wave

Renogy 2000W Pure Sine Wave Inverter on Amazon

Tiny Home Solar System Guide

Tiny homes present a unique solar challenge: they have regular household appliances but limited roof space and a budget that rarely matches a full residential solar install. The most successful tiny home solar builds prioritize which loads stay electric and which switch to propane or wood. Every appliance that converts to propane reduces the solar system cost by hundreds to thousands of dollars. Propane cooking, water heating, and space heating collectively remove 5–10 kWh of daily electrical demand.

Tiny homes on wheels (THOWs) have additional constraints. Weight is critical — a 200Ah LiFePO4 battery weighs 50 pounds compared to 130 pounds for an equivalent AGM bank. Mounting solar panels on a THOW roof requires proper structural assessment for highway speeds and vibration. Many THOW builders use 200–400W of portable solar panels that fold out at a campsite rather than permanent roof mounts, allowing the home to be moved without recalculating wind loads on the panels.

Permanent tiny homes on foundations have more options. A ground-mounted array can be sized much larger than the roof allows, and the home can connect to a larger battery bank in a dedicated utility closet. Some tiny home communities on private land create shared solar microgrids, splitting the cost of a 10kW array among 4–6 units. This reduces individual system cost while delivering grid-comparable reliability.

Frequently Asked Questions

How much solar does a tiny home need?▼
A tiny home with a fridge, lights, laptop, TV, microwave, coffee maker, fan, and router uses about 4,000–5,000Wh per day. At 5 peak sun hours with system losses, that needs 1,070–1,330W of solar. Most tiny home builders install 1,500–2,000W of panels to provide winter headroom. Six 250W panels or four 400W panels achieve this footprint. A 24V system with 200–300Ah LiFePO4 and a 3,000W inverter handles the full tiny home load.
Is a tiny home on solar cheaper than grid electricity?▼
A solar system for a tiny home costs $5,000–10,000 installed. At average US electricity prices of $0.13/kWh, consuming 4,500Wh/day costs about $213/year. Payback period on the solar system is 23–47 years at current electricity rates — longer than the panels' lifespan. Solar off-grid tiny homes make financial sense only where grid connection costs are prohibitive (typically $10,000–50,000 for remote parcels), where full-time mobility is the goal, or when grid connection is simply impossible. The decision is usually about lifestyle, not payback.
What appliances are not practical in an off-grid tiny home?▼
Electric space heaters, electric water heaters, electric clothes dryers, and electric ranges are impractical for solar tiny homes. Each one consumes 1,500–5,000W and would require 3–10 kW of solar panels just for that one appliance. Tiny home off-grid builds use propane for cooking and water heating, wood or propane for primary heat, and a propane or tankless water heater for hot water. This brings the electrical load down to the 2–3 kWh/day range that a reasonably sized solar system can handle.

Need a custom calculation?

The numbers above use typical tiny home defaults. Adjust for your exact appliances and location.

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