{"product_id":"big-battery-apex-6-5k-off-grid-solar-inverter","title":"Big Battery | APEX-6.5K Off-Grid Solar Inverter","description":"\u003ch2 data-end=\"77\" data-start=\"0\"\u003e\u003cstrong\u003eBig Battery | APEX-6.5K 6.5kW Off-Grid Solar Inverter | 48V Split-Phase Power System\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-end=\"507\" data-start=\"79\"\u003eEngineered for dependable off-grid and backup power, the Big Battery  APEX-6.5K delivers robust split-phase output for homes, cabins, and workshops. Its integrated solar charging, high surge capability, and 48V battery compatibility streamline system design while supporting demanding loads. Built for scalability and efficiency, it offers stable performance for renewable, remote, and resilience-focused energy systems.\u003c\/p\u003e\n\u003cp data-end=\"527\" data-start=\"509\"\u003e\u003cstrong data-end=\"525\" data-start=\"509\"\u003eKEY FEATURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"832\" data-start=\"528\"\u003e\n\u003cli data-end=\"575\" data-start=\"528\"\u003eDelivers 6.5kW of continuous off-grid power\u003c\/li\u003e\n\u003cli data-end=\"631\" data-start=\"576\"\u003eSupports 120\/240V split-phase for residential loads\u003c\/li\u003e\n\u003cli data-end=\"675\" data-start=\"632\"\u003eIntegrated MPPT solar charge controller\u003c\/li\u003e\n\u003cli data-end=\"731\" data-start=\"676\"\u003eCompatible with 48V lithium and lead-acid batteries\u003c\/li\u003e\n\u003cli data-end=\"773\" data-start=\"732\"\u003eParallel capable for system expansion\u003c\/li\u003e\n\u003cli data-end=\"832\" data-start=\"774\"\u003eDesigned for off-grid, backup, and hybrid applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/1398\/2234\/files\/1_bec3176b-f7da-463f-b484-e51b5751cc6b.png?v=1769459234\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/1398\/2234\/files\/2_9e88183d-15fe-498e-8ecb-9c06e3edf704.png?v=1769459251\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0775\/1398\/2234\/files\/3_5907d607-ad8c-4dd1-8e76-0e90430d661d.png?v=1769459267\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSection\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral\u003c\/td\u003e\n\u003ctd\u003eDocument title\u003c\/td\u003e\n\u003ctd\u003eAPEX-6.5K Inverter Specifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral\u003c\/td\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBigBattery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral\u003c\/td\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eAPEX-6.5K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral\u003c\/td\u003e\n\u003ctd\u003eGTIN \/ UPC\u003c\/td\u003e\n\u003ctd\u003e00199874185712\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter output\u003c\/td\u003e\n\u003ctd\u003eRated output power\u003c\/td\u003e\n\u003ctd\u003e6,500W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter output\u003c\/td\u003e\n\u003ctd\u003eMax. output power\u003c\/td\u003e\n\u003ctd\u003e13,000VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter output\u003c\/td\u003e\n\u003ctd\u003eRated output voltage\u003c\/td\u003e\n\u003ctd\u003e120\/240 Vac, single-phase \/ split-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter output\u003c\/td\u003e\n\u003ctd\u003eLoad capacity of motors\u003c\/td\u003e\n\u003ctd\u003e4 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter output\u003c\/td\u003e\n\u003ctd\u003eRated frequency\u003c\/td\u003e\n\u003ctd\u003e50 \/ 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter output\u003c\/td\u003e\n\u003ctd\u003eOutput wave\u003c\/td\u003e\n\u003ctd\u003ePure sine wave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter output\u003c\/td\u003e\n\u003ctd\u003eSwitching time\u003c\/td\u003e\n\u003ctd\u003e10ms (typical value)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eBattery type\u003c\/td\u003e\n\u003ctd\u003eLithium-ion battery \/ lead-acid battery \/ user-defined battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eRated battery voltage\u003c\/td\u003e\n\u003ctd\u003e48V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eVoltage range\u003c\/td\u003e\n\u003ctd\u003e40–60Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eMax. solar charging current\u003c\/td\u003e\n\u003ctd\u003e140A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eMax. grid \/ generator charging current\u003c\/td\u003e\n\u003ctd\u003e80A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eMax. hybrid charge current\u003c\/td\u003e\n\u003ctd\u003e140A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar input\u003c\/td\u003e\n\u003ctd\u003eNumber of MPPT\u003c\/td\u003e\n\u003ctd\u003e1 + 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar input\u003c\/td\u003e\n\u003ctd\u003eMax. input power\u003c\/td\u003e\n\u003ctd\u003e5,000W + 5,000W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar input\u003c\/td\u003e\n\u003ctd\u003eMax. input current\u003c\/td\u003e\n\u003ctd\u003e18A + 18A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar input\u003c\/td\u003e\n\u003ctd\u003eMax. open circuit voltage\u003c\/td\u003e\n\u003ctd\u003e550Vdc + 550Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar input\u003c\/td\u003e\n\u003ctd\u003eMPPT voltage range\u003c\/td\u003e\n\u003ctd\u003e125–450Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrid \/ generator input\u003c\/td\u003e\n\u003ctd\u003eInput voltage range\u003c\/td\u003e\n\u003ctd\u003e65–140Vac\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrid \/ generator input\u003c\/td\u003e\n\u003ctd\u003eInput frequency range\u003c\/td\u003e\n\u003ctd\u003e50 \/ 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrid \/ generator input\u003c\/td\u003e\n\u003ctd\u003eBypass overload current\u003c\/td\u003e\n\u003ctd\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrid \/ generator input\u003c\/td\u003e\n\u003ctd\u003eAC inputs\u003c\/td\u003e\n\u003ctd\u003e2 inputs (Grid \u0026amp; Generator)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency\u003c\/td\u003e\n\u003ctd\u003eMax. efficiency\u003c\/td\u003e\n\u003ctd\u003e99.9%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency\u003c\/td\u003e\n\u003ctd\u003eMPPT tracking efficiency\u003c\/td\u003e\n\u003ctd\u003e93%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParallel capability\u003c\/td\u003e\n\u003ctd\u003eParallel capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 6 units; more than 3 units in parallel can form three-phase output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eDimensions (W × H × D)\u003c\/td\u003e\n\u003ctd\u003e25.51 × 16.14 × 5.51 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e48 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eProtection degree\u003c\/td\u003e\n\u003ctd\u003eIP20 (indoor use only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e14–131°F, derate above 113°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eExternal module (optional)\u003c\/td\u003e\n\u003ctd\u003eWi-Fi \/ GPRS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eNoise\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 60dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eCooling method\u003c\/td\u003e\n\u003ctd\u003eIntelligent fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eCommunication\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ CAN \/ USB \/ Dry contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral data\u003c\/td\u003e\n\u003ctd\u003eIntegrated circuit breaker\u003c\/td\u003e\n\u003ctd\u003eUtility \/ Load \/ Battery \/ PV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eCertificates\u003c\/td\u003e\n\u003ctd\u003eUL1741, RoHS, EN61000-6-1, EN61000-6-3, FCC Part15 Class B, IEC62109-1, IEC62109-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverload protection\u003c\/td\u003e\n\u003ctd\u003eOverload protection behavior\u003c\/td\u003e\n\u003ctd\u003eOutput restores after 3 minutes; after 5 overload events, output will be off until inverter restart. 102% \u0026lt; load \u0026lt; 110%: error, output off after 5 minutes. 110% \u0026lt; load \u0026lt; 125%: error, output off after 10 seconds. Load \u0026gt; 125%: error, output off after 5 seconds.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection features\u003c\/td\u003e\n\u003ctd\u003eProtection features\u003c\/td\u003e\n\u003ctd\u003ePV input current limiting, PV input over-voltage protection, PV night reverse current protection, AC input over-voltage protection, AC input under-voltage protection, battery over-voltage protection, battery under-voltage protection, battery over-current protection, AC output short-circuit protection, heat sink over-temperature protection, inverter over-load protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eManual \u0026amp; Downloads\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2026\/01\/APEX-SpecSheet.pdf\"\u003e\u003cstrong\u003eSpec Sheet\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2026\/01\/BigBattery-Apex-6.5-User-Manual.docx.pdf\"\u003e\u003cstrong\u003eUser Manual\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Big Battery","offers":[{"title":"Default Title","offer_id":51629788234010,"sku":"INV034","price":1490.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/1398\/2234\/files\/EG4-APEX-6-5K-Off-Grid-Solar-Inverter-48V-Split-Ph-0.png?v=1769491799","url":"https:\/\/solarguyspro.com\/products\/big-battery-apex-6-5k-off-grid-solar-inverter","provider":"Solar Guys Pro","version":"1.0","type":"link"}