7.38kW Complete Off-Grid Solar Kits - 2x EV6500-S Inverters 6.5kW | 13,000W 120V/240VAC Output | 21.6kWh-37kWh Fortress Power Batteries | 18x 410W Solar Panels

26.3kWh
Estimated Daily PV production7.38kW Complete Off-Grid Solar Kits - 2x EV6500-S Inverters 6.5kW | 13,000W 120V/240VAC Output | 21.6kWh-37kWh Fortress Power Batteries | 18x 410W Solar Panels - 4x eFlex Max 5.4kWh with wallmount (total 21.6kWh)_Outdoor is backordered and will ship as soon as it is back in stock.
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Essentials Appliances
Wi-Fi Router
Lights
Television
Phone Chargers
Laptop Home PC
Microwave
Well Pump
Refrigerator
Major Appliances - Comfort living
MiniSplit AC Conditioner
Kitchen Stove
Hair Dryer
Vaccum Cleaner
Dishwasher
Electrical Tools
Level 1 EV Charger
Heavy Appliances - Wholehome
Level 2 EV Charger
Heatpump
Dryer
Water Heater
Central Air Conditioner
Oven
Power Tools



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Our 7.38kW solar kit is designed to meet the energy needs of off-grid living in small cabins, sheds, and tiny houses. This kit includes efficient solar panels and optimized battery options to ensure reliable power supply.
Annual Estimated PV Production: 18 x 410W (PV array wattage) x 1300 (average hours of sun) = 9,594kWh
Daily Estimated PV Production: 9,594kWh / 365 days = 26.3kWh
Choose the Right Battery for Your Energy Needs:
Follow the steps below to figure out how many batteries you need. This way, you can pick the right amount of power for your home.
Calculating Battery Capacity: A Step-by-Step Guide
Step
Action
Example
1. Analyze Your Energy Consumption
List all appliances and their power usage (watts). Multiply each appliance's power by daily use hours.
TV: 50W × 4h = 200Wh
Laptop: 50W × 2h = 100Wh
…
Total: 200Wh + 100Wh +…= 6,000Wh/day=6kWh/day
2. Determine Desired Backup Time
Decide how many hours or days you want your battery to support.
Desired backup time: 3 days
3. Calculate Total Watt-hours Required
Multiply daily energy usage by backup time and divide by system efficiency (80% or 0.8).
6kWh/day × 3 days ÷ 0.8 = 22.5kWh
4. Choose Your Battery Capacity
Consider your usage environment and choose between eFlex Max 5.4kWh outdoor battery and eVault Max 18.5kWh indoor battery.
Battery: eVault Max 18.5kWh for indoor use
5. Determine the Number of Batteries Needed
Divide total watt-hours required by individual battery capacity.
22.5kWh ÷ 18.5kWh/battery ≈1.22
Round up to 1x eVault Max 18.5kWh battery
Essential Components for Your Project: Below is the packing list for each product you’ll receive. This gives you a clear overview of the components, making it easier to start preparing and building your DIY off-grid solar system.
Frequently Asked Questions
Why is the power station not working after it hasn't been used for a long time?
Why is the power station not working after it hasn't been used for a long time?
If the power station is stored at a low capacity for a long time, lithium batteries will self-consume power, which may lead to a quick discharge. This leads to poor conductivity and a reduced battery lifespan, resulting in poor battery performance.
How should I store and maintain the power station?
How should I store and maintain the power station?
Standard shipping normally takes 3-5 days. Next day shipping is available on all domestic orders (for an additional charge). International shipping times depend on the products and destination (estimated at checkout).
What should I pay attention to when using the app?
What should I pay attention to when using the app?
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What should I do when using a solar charger to charge?
What should I do when using a solar charger to charge?
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Can I recharge using AC and DC input at the same time?
Can I recharge using AC and DC input at the same time?
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