How Much Battery Storage Do I Need for an Off-Grid House? | Baja Solar

Get the Right Battery Storage for 24/7 Off-Grid Power

Going off-grid in Mexico means you need a reliable solar battery storage system to power your home day and night. But how much battery storage do you need for an off-grid house? The answer depends on your daily energy consumption, number of appliances, and backup requirements.

At Baja Solar, we specialize in custom battery storage solutions for off-grid homes, ranches, and remote properties, ensuring you have enough energy storage to stay powered 24/7.

🔆 Get a Free Battery Storage Consultation Today!

📞 WhatsApp: 01-951-577-5097
📧 Email: ben@bajasolar.com.mx
🌐 Visit us: bajasolar.com.mx

🔹 How to Calculate the Battery Storage You Need

🔋 Step 1: Determine Your Daily Energy Use (kWh)

• Add up the wattage of all appliances, lights, AC, and electronics.

• Multiply by the number of hours used per day.

• Example: If your home uses 20 kWh per day, you need at least 20 kWh of battery capacity for 24-hour power.

🔋 Step 2: Account for Backup Days (Autonomy Days)

• Most off-grid systems need 2-3 days of backup power for cloudy/rainy days.

• If you use 20 kWh per day, and need 3 days of backup, you need:

  • 20 kWh x 3 days = 60 kWh of total battery storage.

🔋 Step 3: Consider Depth of Discharge (DOD)

• Batteries can’t discharge 100% without reducing lifespan.

• Lithium-ion batteries have 80-90% usable capacity, while lead-acid has 50% usable capacity.

🔹 Off-Grid Battery Storage Sizing Guide

Home Type Daily Energy Use (kWh) Recommended Battery Capacity (kWh) Battery Type Estimated Cost (USD) Small Cabin (Basic Appliances) 5-10 kWh/day 10-20 kWh Lithium or Lead-Acid $7,000 - $15,000 Mid-Sized Home (Lights, AC, Fridge, TV, Kitchen) 15-25 kWh/day 30-50 kWh Lithium-Ion Preferred $20,000 - $35,000 Luxury Off-Grid Home (Multiple ACs, Pool, EV Charger) 30-50 kWh/day 60-100 kWh High-Capacity Lithium $40,000 - $80,000

🔆 Need a custom estimate? Contact us for a personalized energy audit!

📞 WhatsApp: 01-951-577-5097
📧 Email: ben@bajasolar.com.mx

🔹 Best Battery Options for Off-Grid Homes

1️⃣ Lithium-Ion Batteries (Best Performance & Longevity)

✅ 10-15+ year lifespan
✅ 80-90% depth of discharge (DOD)
✅ Fast charging & high efficiency

🔋 Best Brands:

• Tesla Powerwall 2 (13.5 kWh) – Smart home compatible

• LG Chem RESU 16H (16 kWh) – Compact & powerful

• Enphase IQ Battery (10-15 kWh) – Modular & expandable

💰 Cost: $7,000 - $15,000 per unit

2️⃣ Lead-Acid Deep Cycle Batteries (Lower Cost, More Maintenance)

✅ Good for budget-friendly setups
✅ 50% usable capacity (DOD)
✅ Lower lifespan (5-7 years)

🔋 Best Brands:

• Trojan L16RE-B (6V, 370Ah) – Reliable deep-cycle battery

• Rolls Surrette S-550 (6V, 428Ah) – High-capacity storage

💰 Cost: $2,500 - $5,000 per unit

3️⃣ Saltwater Batteries (Eco-Friendly & Maintenance-Free)

✅ Non-toxic, 100% recyclable
✅ Long lifespan (~15 years)
✅ Safe, no overheating risks

🔋 Best Brand:

• Blue Ion HI (16 kWh) – Sustainable, saltwater-based storage

💰 Cost: $10,000 - $20,000 per unit

🔹 Factors That Affect Battery Storage Needs

🔸 Appliance Usage – AC, refrigerators, and electric stoves need higher capacity.
🔸 Sunlight Availability – Cloudy areas require more battery backup days.
🔸 Energy Efficiency – LED lighting and energy-efficient appliances reduce battery demand.
🔸 Expansion Plans – Choose a scalable battery system to upgrade later.

🔹 Why Choose Baja Solar?

🏆 Off-Grid Solar Experts in Baja California
🏆 Top Battery Brands (Tesla, LG, Enphase, Trojan, Blue Ion)
🏆 Custom System Design & Installation
🏆 Full-Service Permits & Grid-Free Solutions
🏆 Over 10+ Years of Experience in Mexico

🔹 Get Your Off-Grid Battery System Today!

📞 WhatsApp: 01-951-577-5097
📧 Email: ben@bajasolar.com.mx
🌐 Visit us: bajasolar.com.mx

🚀 Power your off-grid home with the right battery storage today! 🔆