As many of you may know, we only sell products here that we know to be tried and true. We believe in quality, sustainability, and efficiency, which is why we’d like to introduce to you Fortress Power’s Lithium batteries.
Fortress Power is a US based company that uses Lithium Ferro Phosphate technology to make their batteries. LFP (Lithium Ferro Phosphate) batteries are on the rise and replacing others because of its technical advances and very high level of safety.
See our comparisons and product offerings below.
How do LFP Batteries Compare to Others?
LFP
Lithium Ion
Lead-acid
Safety
Life Cycles
Installation
Maintenance
Depth of Discharge
Cost Analysis
The Choice is Easy!
How Can I Use LFP Batteries?
Lead-acid batteries and generators have only one use: backup power.
The long service life and deep cycling capabilities of LFP batteries will allow you to take full advantage of the following applications:
Battery Backup
Whether your power is coming from solar, wind, or a utility company, use Fortress LFP batteries as a backup to protect your home or business from outages
Self-Supply
Store excess solar energy produced during the day for powering your home at night
Time-Based Control
Lower your power bill by storing energy when utility rates are lowest and using it when rates are high
Demand Charge Curtailment
Lower the demand costs of your business
Fortress Power vs Other Lithium Competitors
At this point, the advantages that Lithium batteries hold over Lead-acid batteries are clear, but let’s take a closer look into Fortress LFP batteries specifically against other popular brands
- DC Coupling
- Lithium Iron Phosphate
- 6,000 life cycles
- Low price level
- Lowest cost per cycle
- Easy Maintenance
Tesla
- AC Coupling*
- Lithium NMC
- 2,800 life cycles
- Low price level
- Medium cost per cycle
- Difficult Maintenance
Solaredge + LG Chem
- DC Coupling
- Lithium NMC
- 2,500 life cycles
- Medium price level
- High cost per cycle
- Easy Maintenance
*AC coupling requires an additional PV inverter and has at least 5% more power loss
Technological Advantages of LFP Batteries
See a comparison of Lithium LFP batteries and Lithium NMC batteries (technology used by Tesla and other competing Lithium battery companies)
LFP vs NMC
Fortress - LFP
Others (i.e. Tesla, LG Chem) - NMC
Safety
- LFP
- NMC
Eco-friendly
- LFP
- NMC
Operating Temp
LFP: -4 – 140 oF
-4 – 140 oF
NMC: -4 – 140 oF
Peak Power Output
LFP is greater than Lithium Ion
Rate of Capacity Loss
LFP is less than Lithium Ion
Life Cycles
LFP is greater than Lithium Ion
Can I Use Fortress Power Batteries with My Existing Equipment?
Yes! Fortress Power Batteries are easily integrated with new and existing PV systems. Click each brand below to view compatible units and configurations
Sol-ark 8k Inverter
Sol-ark 12k Inverter
AC or DC coupled
Conext XW MPPT charge controller
Conext XW+ series
Conext SW
AC or DC coupled
Skybox
FLEX max charge controller (48V)
FLEXpower series (48V)
Radian series (48V)
FXR(A) and FXR (E) series (48V)
GVFX and GVFX series (48V)
AC or DC coupled
MS 4448PAE
MS 4048-20B
AC or DC coupled
SUNNY ISLAND 4548-US/6048-US
SUNNY ISLAND 3.0M/4.4M/6.0H/8.0H
AC coupled
Phoenix VE.Direct Inverter
MultiPlus and Quatro Inverter/Charger
Skylla-TG Charger
General
Color Control or Venus GX
DC coupled
TriStar MPPT 600V
TriStar MPPT
Tristar PWM
MultiWave™ 4KW
DC coupled
Solar Classic 150, 200 & 250
Solar Classic 150, 200 & 250-SL
DC coupled
Don’t see the inverter/charger you have? Contact us
Fortress Power Batteries
Fortress Power LFP-5
Fortress Power LFP-5
Fortress Power’s High-Performance Lithium Battery is easy to install, safe, and consistently reliable. It provides the lowest lifetime energy cost for both new solar and retrofit customers.
Fortress Lithium Battery has the industry’s most advanced technology with a Battery Management System that integrates multilevel safety concepts:
- Overcharge and deep discharge protection
- Voltage and temperature observation
- Cell monitoring and balancing
- Built-in accessible 125 Amp DC breaker On/Off switch
The LFP-5k has a large power capacity, with fast charging and continuous discharge power, creating a 98% round-trip conversion.
On Grid: Use as energy storage, whether your energy is coming from solar, wind, or a utility company, to protect your home or business from power outages.
Off Grid: Backup power supply for your off grid energy system
AC Coupling to integrate into existing PV systems
DC Coupling to add to new PV systems or retrofit to an existing system with string inverters
Total Energy : 5.12 kWh
Max. Charge Current (continuous): 80 A
Max. Discharge Current (continuous): 100 A
Max. Pulse Current (for 5 seconds): 180 A
Capacity: 100 Ah
Nominal Voltage: 51.2 V
Voltage Range: 44 – 58.4 V
Charging Temperature: 32 – 113 oF
Discharging Temperature: -4 – 140 oF
Storage Temperature : 41-113 oF
Dimensions (HxWxD) : 9.4 x 26.5 x 20 inches
Weight: 130 lb
Enclosure Protection Rating: IP55
Mounting Options: Floor standing
Certificates: UL 1642, CE
Warranty: 5 year
Life Cycles: 6,000 at 80% DoD
Scaling: 3 in parallel
Battery Breaker: 125 A
Efficiency: >98%
Cost: $3,600
Fortress Power LFP-10
Fortress Power LFP-10
Fortress Power’s High-Performance Lithium Battery is easy to install, safe, and consistently reliable. It provides the lowest lifetime energy cost for both new solar and retrofit customers.
Fortress Lithium Battery has the industry’s most advanced technology with a Battery Management System that integrates multilevel safety concepts:
- Overcharge and deep discharge protection
- Voltage and temperature observation
- Cell monitoring and balancing
- Built-in accessible 125 Amp DC breaker On/Off switch
The LFP-10k has a large power capacity, with fast charging and continuous discharge power, creating a 98% round-trip conversion.
On Grid: Use as energy storage, whether your energy is coming from solar, wind, or a utility company, to protect your home or business from power outages.
Off Grid: Backup power supply for your off grid energy system
AC Coupling to integrate into existing PV systems
DC Coupling to add to new PV systems or retrofit to an existing system with string inverters
Max. Charge Current (continuous): 80 A
Max. Discharge Current (continuous): 100 A
Max. Pulse Current (for 5 seconds): 180 A
Capacity: 200 Ah
Nominal Voltage: 51.2 (48) V
Voltage Range: 44 – 58.4 V
Charging Temperature: 32 – 113 oF (0 – 55 oC)
Discharging Temperature: -4 – 140 oF (0 – 65 oC)
Storage Temperature : 41-113 oF (5 – 55 oC)
Dimensions (HxWxD) : 31.4 x 17.3 x 9.4 inches (860 x 440 x 238 mm)
Weight: 210 lb (95 kg)
Enclosure Protection Rating: IP32 (indoor unit)
Mounting Options: Floor standing
Certificates: UL 1642, CE
Warranty: 10 years (5 years outside of US & Canada)
Life Cycles: 6,000 at 80% DoD
Scaling: 2 in parallel
Battery Breakers: 150 A
Round Trip Efficiency: >98%
Cost: $6,750
Fortress Power eVault 18.5
Fortress Power eVault 18.5
Fortress Power’s engineers are on a mission to provide you with the most advanced Lithium Iron Phosphate Battery available! Not only is the new Fortress eVault 18.5 kWh battery safe, long-lasting and affordable, but is also equipped with a brand new LCD screen that displays voltage, state of charge, remaining capacity and power output.
The built-in Battery Management System integrates multilevel safety concepts for excellent performance:
- Overcharge and Deep Discharge Protection
- Over Current Protection
- Voltage and Temperature Monitoring
- Over-heat protection
- Cell Monitoring and Balancing
Fortress LFP batteries use the safest and most reliable technology, are easy to install, and are competitively priced with high round trip efficiency!
On Grid: Use as energy storage, whether your energy is coming from solar, wind, or a utility company, to protect your home or business from power outages.
Off Grid: Backup power supply for your off grid energy system
AC Coupling to integrate into existing PV systems
DC Coupling to add to new PV systems or retrofit to an existing system with string inverters
Capacity: 360 Ah
Recommended Charge Current: 100 A
Max. Charge Current (continuous): 170 A
Max. Discharge Current (continuous): 180 A
Max. Pulse Current (for 10 seconds): 200 A
Nominal Voltage: 51.2 (48) V
Voltage Range: 45 – 58.4 V
Life Cycles: 6,000 at 80% DoD
Charging Temperature: 32 – 113 oF
Discharging Temperature: 32 – 113 oF
Recommended Storage Temperature : 50 – 95 oF
Dimensions (HxWxD) : 38.8 x 19.2 x 21.3 inches
Weight: 476 lb
Enclosure Protection Rating: IP21
Mounting Options: Floor standing
Certificates: UL 1624
Warranty: 5 or 10 year
Scalability: Maximum 12 in parallel (222 kWh)
Communication: CAN/RS485
High Current Circuit Breaker: 250A
Efficiency: >98%
Cost: $12,420
Fortress + Solark
The Ultimate Energy Storage Solution
Finally, Affordable Battery Solar!
- Powerful
- Efficient
- All-in-one
- New or Retrofit
- Grid-tie, Hybrid, Off-grid
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