Trojan Motive T-105 225Ah 6V Flooded ELPT/EUT Deep-Cycle Battery with Bayonet Cap
Pickup on Fri, Dec 5 from Ft. Myers, FL
Delivery on Dec 10–15
Trojan Motive T-875 170Ah 8V Flooded ELPT Deep-Cycle Battery with Bayonet Cap
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive 24-AES 76Ah 12V AGM DT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Orlando, FL
Delivery on Dec 10–15
Trojan Solar SAES-06-220 209Ah 6V AGM LT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive T105-AES 207Ah 6V AGM M8 Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive T-1275 150Ah 12V Flooded ELPT Deep-Cycle Battery with Master Vent
Pickup on Fri, Dec 5 from Ft. Myers, FL
Delivery on Dec 10–15
MK Battery DEKA 8G27-HFL-DEKA Gel Deep Cycle Lead-Acid Storage Battery 12V
Delivery on Dec 10–15
Trojan Motive 27-AES 89Ah 12V AGM DT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
MK Battery DEKA 8L16-DEKA Flooded Lead-Acid Storage Battery 6V
Delivery on Dec 10–15
MK Battery DEKA 8G31-HST-DEKA Gel Deep Cycle Lead-Acid Storage Battery 12V
Delivery on Dec 10–15
Trojan Solar SAES-12-105 107Ah 12V AGM LT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive 31-AES 102Ah 12V AGM DT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive 31-AES 102Ah 12V AGM M8 Deep-Cycle Battery
Pickup on Fri, Dec 5 from Orlando, FL
Delivery on Dec 10–15
Trojan Motive T875-AES 158Ah 8V AGM M8 Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Solar SAES-12-135 134Ah 12V AGM LT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Tampa, FL
Delivery on Dec 10–15
Trojan Motive T1275-AES 130Ah 12V AGM M8 Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Solar SAES-06-315 285Ah 6V AGM LT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive J305-AES 279Ah 6V AGM DT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive J305-AES 279Ah 6V AGM M8 Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Solar SAES-06-375 364Ah 6V AGM LT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive L16-AES 325Ah 6V AGM DT Deep-Cycle Battery
Delivery on Dec 10–15
Trojan Motive J185-AES 175Ah 12V AGM DT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Solar SAES-12-205 179Ah 12V AGM LT Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
Trojan Motive J185-AES 175Ah 12V AGM M8 Deep-Cycle Battery
Pickup on Fri, Dec 5 from Miami, FL
Delivery on Dec 10–15
MK Battery DEKA 8A8D-LTP-DEKA AGM Lead-Acid Storage Battery 12V
Delivery on Dec 10–15
MK Battery DEKA 8G8D-HLT-DEKA Gel Deep Cycle Lead-Acid Storage Battery 12V
Delivery on Dec 10–15
SimpliPHI 1.4 24V Lithium Ferro Phosphate Battery (by Briggs & Stratton)
Delivery on Dec 12–17
MK Battery Deka 5.3kWh 100Ah 48V Lithium Iron Phosphate Battery DD5300
Delivery on Dec 10–15
SimpliPHI 3.8 48V Lithium Ferro Phosphate Battery (by Briggs & Stratton)
Delivery on Dec 12–17
SimpliPHI 3.8 24V Lithium Ferro Phosphate Battery (by Briggs & Stratton)
Delivery on Dec 12–17
Delivery on Dec 12–17
SimpliPHI 6.6 48V Lithium Ferro Phosphate Stackable Battery (by Briggs & Stratton)
Delivery on Dec 12–17
Trojan Lithium OnePack High Performance TR-48-170-HP 171Ah 51.2V M8 LiFePO4 Battery
Pickup on Fri, Dec 5 from Orlando, FL
Delivery on Dec 10–15
Fortress Power Evault Max 18.5 kWh Lithium Battery Storage
Delivery on Dec 10–15
Home battery backup systems provide automatic power during grid failures, switching to battery power within 20 milliseconds through integrated transfer switches. The core challenge is matching battery capacity to your actual household loads while accounting for efficiency losses and regional outage patterns.
How do you calculate real backup runtime for home battery systems?
Backup runtime depends on three factors: usable battery capacity, continuous household load, and inverter efficiency. A 13.5 kWh battery with 90% usable capacity (12.15 kWh actual) powering 1 kW of critical loads provides approximately 10-11 hours of autonomy after accounting for 8-12% inverter losses.
Load variability significantly impacts duration. Refrigerators average 200W despite 800W peak draw. Well pumps require 1,200W surge capacity. Central air conditioning consumes 3-5 kW continuously, dramatically reducing summer autonomy compared to moderate seasons.
Use your utility bill's actual 24-hour consumption data, not theoretical device ratings. Download hourly smart meter data if available and add 20% margin for unexpected loads and inverter inefficiency.
Tesla Energy
Critical load systems isolate essential circuits onto dedicated backup panels, requiring only 10-15 kWh for 24-36 hours at 500-750W average load. Whole-home backup demands 25-40 kWh for a 2,500 sq ft home with central air, costing $28,000-$45,000 installed versus $12,000-$18,000 for critical configurations.
Lithium iron phosphate (LFP) dominates residential backup due to superior cycle life exceeding 6,000 cycles versus 4,000 for NMC alternatives. LFP operates safely across -4°F to 140°F without active cooling, critical for temperature-extreme regions. The chemistry maintains 90% capacity at elevated charge states, essential for backup applications where batteries remain at full charge awaiting grid failures.
LFP costs have reached parity with NMC (within 5-8%), and total lifecycle costs favor LFP when accounting for replacement needs. Southern states including Arizona, Nevada, and Texas particularly benefit from LFP's passive thermal tolerance.
⚡ AC-Coupled Systems — Connect battery inverters to your main panel, ideal for adding backup to existing solar installations without replacing functioning equipment. Round-trip efficiency reaches 85-90%. Installation preserves existing solar warranties and equipment investments.
🔋 DC-Coupled Systems — Integrate batteries directly into solar charge controllers through hybrid inverters, achieving 92-96% efficiency. This captures an additional 5-7% of annual solar production but requires replacing existing solar inverters, often cost-prohibitive for systems under 5 years old.
Keep AC-coupled additions for solar systems less than 5 years old to preserve warranties. Specify DC-coupled hybrid configurations for new installations or when replacing failed equipment.
Enphase Energy
Hurricane-prone regions require either oversized 40-50 kWh systems or hybrid approaches pairing batteries with propane generators. Batteries handle overnight loads while generators recharge batteries and power heavy daytime consumption, extending total autonomy beyond pure battery capacity.
Residential battery installations require electrical permits under NEC Article 706, with approval timelines ranging from 2-4 weeks in streamlined jurisdictions to 8-12 weeks in municipalities unfamiliar with battery technology. Systems exceeding 20 kWh may trigger fire marshal review.
Utility interconnection agreements require separate applications even for properties with existing solar interconnection. Processing times vary from 2 weeks (cooperative utilities) to 90 days (investor-owned utilities). Anti-islanding protection validation prevents batteries from backfeeding the grid during outages.
Code compliance extends beyond electrical work. Many jurisdictions enforce 3-5 foot setbacks from property lines and structures. Systems exceeding 500 pounds require structural engineering certification. Wall-mounted installations need attachment to structural framing, often forcing exterior installations where temperature extremes reduce longevity.
🎯 Accurate Capacity Sizing — Use actual consumption data rather than device ratings. Size systems with 20% capacity margin beyond calculated minimums.
🔬 Chemistry Selection — Choose lithium iron phosphate for 15-20 year cycle life and thermal stability across extreme temperatures.
⚙️ System Architecture — AC-coupled for retrofits with existing solar. DC-coupled for new installations delivering 5-7% higher annual efficiency.
Successful home battery backup requires three engineering decisions: accurate capacity sizing using actual consumption data, lithium iron phosphate chemistry selection for cycle life and thermal stability, and system architecture matching your solar infrastructure status. Allocate 60-90 days for permitting and utility interconnection beyond physical installation work. Match capacity to your region's worst-case outage duration with appropriate safety margin.
Ready to Design Your Home Battery Backup System?
Our team of energy engineers will analyze your consumption patterns, regional outage history, and existing infrastructure to recommend the optimal battery configuration for your home.
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