Energy Storage - Batteries and Power Banks

Energy storage is a key component of an emergency system. Batteries allow you to use solar or wind energy at night and on cloudy days. This guide will help you choose the right battery type.

1 Battery Chemistry - What to choose?

Lead Acid (AGM/Gel)

Heavy, cheap. Must not be discharged below 50% (damages battery). 300-500 cycles life. Good as a cheap stationary solution.

AGM (Absorbent Glass Mat)

Maintenance-free, sealed. No water top-up required. Vibration resistant. More expensive than standard lead-acid but more convenient.

LiFePO4 (Lithium Iron Phosphate)

Recommended

The storage king. Safe (don't catch fire), 2000-5000 cycles life (10 years daily use). Can be discharged to zero. Expensive upfront, cheapest long-term.

2 Power Banks and Portable Chargers

Small, portable energy storage for charging phones, flashlights and small electronics. Essential in a bug-out bag.

  • Minimum 20,000 mAh capacity for smartphone charging over several days
  • Multiple USB ports (including USB-C PD for fast charging)
  • Solar panel versions for field recharging
  • Pass-through function (charge and power simultaneously)

3 Battery Maintenance

Regularly charge and discharge batteries. Store in a cool, dry place. Check voltage every few months. Replace before capacity loss.