How to Design a 3-Day Solar Backup System — Step-by-Step

How I Built a Complete Off-Grid Solar System for Under $2,000 (With Proof)

Can you really go off-grid without going broke? I did. And I’m breaking down exactly how I built a 1.5kW off-grid solar system — panels, batteries, inverter and all — for under $2,000. If you want affordable energy independence, you’re in the right place.

🔧 My Power Goals

• ✅ Run lights, fans, TV, laptop, Wi-Fi, fridge
• ✅ At least 12 hours autonomy
• ✅ No grid dependency at all
• ✅ Cost under $2K USD

📦 Total System Breakdown (with Prices)

Component	Qty	Cost (USD)
Solar Panels (250W)	6	$600
MPPT Charge Controller (40A)	1	$120
12V 150Ah AGM Battery	2	$480
Pure Sine Inverter (3000W)	1	$300
Wires, Mounts, Breakers	—	$150
Total		$1,650

Note: I bought most parts online and waited for discount season (Black Friday + local sales). The extra $350 went to tools + installation help.

🔋 Performance & What I Power Daily

• 4 LED lights (8 hours)
• 2 Ceiling fans (10 hours)
• 32" LED TV + DTH (4 hours)
• Laptop + Wi-Fi router (6 hours)
• 165L Fridge (24/7)

🛠️ Tips If You Want to Copy My Setup

• Buy from trusted dealers or online with warranty
• Check local taxes/duties — it can add 10–20%
• Use MPPT controller for better winter charging
• Choose lithium if you can spend a little more (faster charge, longer life)

🔗 Related Tools

• Solar Load & Panel Calculator
• Inverter Sizing Guide
• Battery Capacity Calculator

⚡ Final Words

If you thought solar was out of reach, I hope this post changed your mind. Going off-grid doesn’t need to break the bank. Plan smart, shop smart, and you’ll be energy-free in no time. Try our free tools to plan your own $2K setup!