{"product_id":"eg4-wallmount-48v-16kwh-all-weather-battery-ess-314ah-eg4-flexboss21-hybrid-inverter-grid-tied-system","title":"EG4 WallMount 48V 16kWh All-Weather Battery ESS | 314Ah | EG4 FlexBOSS21 Hybrid Inverter | Grid-Tied System","description":"\u003cdiv class=\"esk-pd esk-pd-b eg4314fb21-pd\"\u003e\n\u003csection class=\"esk-hero\"\u003e\u003cp class=\"esk-eyebrow\"\u003e48V Outdoor ESS · EG4 314Ah All-Weather + FlexBOSS21\u003c\/p\u003e\n\u003ch2\u003e16kWh of IP67 Outdoor Battery Storage, Paired With a 16kW Hybrid Inverter\u003c\/h2\u003e\n\u003cp class=\"esk-lead\"\u003eThis system pairs the EG4 WallMount 314Ah All-Weather battery (16kWh nominal, 12.86kWh recommended usable) with the EG4 FlexBOSS21 hybrid inverter. The battery is sealed to IP67 with built-in heaters and the inverter is NEMA 4X, so the whole system can mount outside on an exterior wall. It delivers up to 16kW of continuous output with PV and grid combined, takes up to 21kW of solar across 3 MPPT trackers, and is UL 9540 certified as a pair. Add the GridBOSS set to AC-couple an existing grid-tied solar system to battery backup.\u003c\/p\u003e\n\u003cdiv aria-hidden=\"true\" class=\"esk-divider\"\u003e\u003csvg preserveaspectratio=\"none\" viewbox=\"0 0 600 20\"\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" d=\"M0,10 Q25,-4 50,10 T100,10 T150,10 T200,10 T250,10 T300,10 T350,10 T400,10 T450,10 T500,10 T550,10 T600,10\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"esk-stats\"\u003e\u003cdiv class=\"esk-stat\"\u003e\n\u003cspan class=\"num\"\u003e16kWh\u003c\/span\u003e\u003cspan class=\"label\"\u003ePer Battery\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-stat\"\u003e\n\u003cspan class=\"num\"\u003eIP67\u003c\/span\u003e\u003cspan class=\"label\"\u003eOutdoor Rated\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-stat\"\u003e\n\u003cspan class=\"num\"\u003e21kW\u003c\/span\u003e\u003cspan class=\"label\"\u003eMax Solar Input\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-stat\"\u003e\n\u003cspan class=\"num\"\u003eUL 9540\u003c\/span\u003e\u003cspan class=\"label\"\u003eCertified Pairing\u003c\/span\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"esk-config\"\u003e\u003ch3\u003eWhat's In This System\u003c\/h3\u003e\n\u003cp class=\"esk-config-sub\"\u003ePre-matched components, sold together as one kit. Quantities scale with the set you choose.\u003c\/p\u003e\n\u003cdiv class=\"esk-config-grid\"\u003e\n\u003cdiv class=\"esk-config-card\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003crect rx=\"2\" height=\"9\" width=\"17\" y=\"8\" x=\"2\"\u003e\u003c\/rect\u003e\u003crect stroke=\"none\" fill=\"currentColor\" rx=\"1\" height=\"3\" width=\"2.5\" y=\"11\" x=\"19\"\u003e\u003c\/rect\u003e\u003crect stroke=\"none\" fill=\"currentColor\" rx=\"0.6\" height=\"4.4\" width=\"4\" y=\"10.3\" x=\"5\"\u003e\u003c\/rect\u003e\u003c\/svg\u003e\u003cp class=\"qty\"\u003eQty 1-6\u003c\/p\u003e\n\u003ch4\u003eEG4 314Ah All-Weather Battery\u003c\/h4\u003e\n\u003cp\u003e16kWh nominal, IP67 sealed enclosure, internal heaters for cold-weather charging, smart BMS with active balancing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-config-card\"\u003e\n\u003csvg aria-hidden=\"true\" fill=\"currentColor\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M13 2 4 14h6l-1 8 9-12h-6l1-8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cp class=\"qty\"\u003eQty 1-3\u003c\/p\u003e\n\u003ch4\u003eEG4 FlexBOSS21 Inverter\u003c\/h4\u003e\n\u003cp\u003eUp to 16kW continuous output with PV and grid combined, 21kW max solar input, NEMA 4X outdoor enclosure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-config-card\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003crect rx=\"1.5\" height=\"14\" width=\"16\" y=\"5\" x=\"4\"\u003e\u003c\/rect\u003e\u003cpath d=\"M8 19v2M16 19v2M9 9h6\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cp class=\"qty\"\u003e1 per battery\u003c\/p\u003e\n\u003ch4\u003eEG4 All-Weather Conduit Box\u003c\/h4\u003e\n\u003cp\u003eProtects the battery power and communication wiring on outdoor installs. Battery-to-inverter power and comms cables included; paralleling cables included on multi-battery sets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-config-card\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003ccircle r=\"2.5\" cy=\"12\" cx=\"6\"\u003e\u003c\/circle\u003e\u003ccircle r=\"2.5\" cy=\"12\" cx=\"18\"\u003e\u003c\/circle\u003e\u003cpath stroke-dasharray=\"2 2\" d=\"M8.5 12h7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cp class=\"qty\"\u003eGridBOSS sets\u003c\/p\u003e\n\u003ch4\u003eEG4 GridBOSS (200A)\u003c\/h4\u003e\n\u003cp\u003eSplit-phase 200A microgrid interconnect device for whole-home backup, load management and AC coupling. Breakers not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"esk-features\"\u003e\u003ch3\u003eWhat Makes This System Different\u003c\/h3\u003e\n\u003cdiv class=\"esk-feature-grid\"\u003e\n\u003cdiv class=\"esk-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" class=\"esk-accent-2\"\u003e\u003cpath d=\"M12 2 4 5v6c0 5 3.4 8.4 8 9.9 4.6-1.5 8-4.9 8-9.9V5l-8-3Z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003ch4\u003eBuilt to Live Outside\u003c\/h4\u003e\n\u003cp\u003eIP67 battery and NEMA 4X inverter mount side by side on an exterior wall, so no garage or utility room space is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003ccircle r=\"4.2\" cy=\"12\" cx=\"12\"\u003e\u003c\/circle\u003e\u003cpath d=\"M12 3v2M12 19v2M4.2 12H2.2M21.8 12h-2\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003ch4\u003eSelf-Heating for Cold Climates\u003c\/h4\u003e\n\u003cp\u003eInternal heaters keep the cells in charging range when temperatures drop, so winter solar still gets stored.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003ccircle r=\"2.5\" cy=\"12\" cx=\"6\"\u003e\u003c\/circle\u003e\u003ccircle r=\"2.5\" cy=\"12\" cx=\"18\"\u003e\u003c\/circle\u003e\u003cpath stroke-dasharray=\"2 2\" d=\"M8.5 12h7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003ch4\u003eAdd Batteries to Existing Solar\u003c\/h4\u003e\n\u003cp\u003eWith the GridBOSS, the AC output of an existing grid-tied inverter connects to the GridBOSS GEN port, so you can add storage without reworking your roof.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feature\"\u003e\n\u003csvg aria-hidden=\"true\" fill=\"currentColor\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M13 2 4 14h6l-1 8 9-12h-6l1-8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003ch4\u003e16kW Hybrid Output\u003c\/h4\u003e\n\u003cp\u003eUp to 16kW continuous with PV and grid working together, 12kW max battery charge and discharge power through the inverter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M4 20v-3M9 20v-7M14 20v-11M19 20V4\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003ch4\u003e21kW Solar, 3 MPPT\u003c\/h4\u003e\n\u003cp\u003eThree MPPT trackers and five input strings handle large or multi-orientation arrays.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-feature\"\u003e\n\u003csvg aria-hidden=\"true\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.7\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\"\u003e\u003crect rx=\"1.5\" height=\"12\" width=\"18\" y=\"5\" x=\"3\"\u003e\u003c\/rect\u003e\u003cpath d=\"M8 20h8M12 17v3\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003ch4\u003eClosed-Loop Communication\u003c\/h4\u003e\n\u003cp\u003eBattery and inverter talk directly over CAN\/RS485, with Bluetooth and WiFi monitoring and over-the-air firmware updates.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003cdiv aria-hidden=\"true\" style=\"background: var(--ink-2); color: var(--accent); opacity: 0.7;\" class=\"esk-divider\"\u003e\u003csvg preserveaspectratio=\"none\" viewbox=\"0 0 600 20\"\u003e\u003cpath stroke-linecap=\"round\" stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" d=\"M0,10 Q25,-4 50,10 T100,10 T150,10 T200,10 T250,10 T300,10 T350,10 T400,10 T450,10 T500,10 T550,10 T600,10\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003csection class=\"esk-narrative\"\u003e\u003ch3\u003eOutdoor Storage Without the Compromises\u003c\/h3\u003e\n\u003cp\u003eMost home batteries need a conditioned indoor space. The EG4 314Ah All-Weather is sealed to IP67 and heats itself in the cold, so it can sit on the same exterior wall as the FlexBOSS21 and your main panel. Each battery ships with its own All-Weather conduit box, keeping the DC and communication wiring protected from rain and sun.\u003c\/p\u003e\n\u003cp\u003eIf you already have a grid-tied solar inverter that can't take a battery, the GridBOSS sets solve that. The GridBOSS sits between the grid, your main panel and the FlexBOSS21, and your existing inverter's AC output lands on its GEN port. Your panels keep producing as before, surplus charges the batteries, and the GridBOSS isolates the home from the grid during an outage. For new installs, the FlexBOSS21 takes up to 21kW of solar directly and runs the system on its own.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"esk-specs\"\u003e\u003ch3\u003eFull Specifications\u003c\/h3\u003e\n\u003cdiv class=\"esk-specs-block\"\u003e\n\u003cp class=\"esk-specs-block-title\"\u003e\u003ca href=\"\/products\/eg4-48v-wallmount-16kwh-314ah-all-weather-lithium-battery-lifepo\"\u003eBattery - EG4 314Ah All-Weather\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv class=\"esk-spec-groups\"\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\n\u003ch4\u003eCapacity\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal voltage\u003c\/td\u003e\n\u003ctd\u003e51.2 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal energy capacity\u003c\/td\u003e\n\u003ctd\u003e16 kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsable energy (80% DoD)\u003c\/td\u003e\n\u003ctd\u003e12.86 kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated capacity\u003c\/td\u003e\n\u003ctd\u003e314 Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\n\u003ch4\u003eCharging \u0026amp; Discharge\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous charge current\u003c\/td\u003e\n\u003ctd\u003e157 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax continuous discharge current\u003c\/td\u003e\n\u003ctd\u003e200 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous charge\/discharge power\u003c\/td\u003e\n\u003ctd\u003e8 kW \/ 10.2 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak power\u003c\/td\u003e\n\u003ctd\u003e12.8 kW (3 sec)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\n\u003ch4\u003eEnvironmental\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging temp range\u003c\/td\u003e\n\u003ctd\u003e32-122°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarging temp range\u003c\/td\u003e\n\u003ctd\u003e-4-131°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure rating\u003c\/td\u003e\n\u003ctd\u003eIP67 (outdoor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-heating\u003c\/td\u003e\n\u003ctd\u003eYes, internal heaters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\n\u003ch4\u003ePhysical \u0026amp; Warranty\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e309 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (H×W×D)\u003c\/td\u003e\n\u003ctd\u003e34.6 × 21.7 × 9.3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle life\u003c\/td\u003e\n\u003ctd\u003e10,000 @ 0.5C, 80% DoD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e10 years or 10,000 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-specs-block\"\u003e\n\u003cp class=\"esk-specs-block-title\"\u003e\u003ca href=\"\/products\/eg4-flexboss21-21kw-split-phase-hybrid-solar-inverter\"\u003eInverter - EG4 FlexBOSS21\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv class=\"esk-spec-groups\"\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\n\u003ch4\u003eOutput\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous output (PV + grid)\u003c\/td\u003e\n\u003ctd\u003e66.7A \/ 16 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated output power\u003c\/td\u003e\n\u003ctd\u003e12,000W @ 240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak power (0.5s \/ 1s)\u003c\/td\u003e\n\u003ctd\u003e24,000W \/ 18,000W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransfer time\u003c\/td\u003e\n\u003ctd\u003e20ms default \/ 10ms configurable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\n\u003ch4\u003eSolar Input\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPPT channels\u003c\/td\u003e\n\u003ctd\u003e3 (5 strings total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated current per MPPT\u003c\/td\u003e\n\u003ctd\u003e26A \/ 26A \/ 15A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax utilized PV array\u003c\/td\u003e\n\u003ctd\u003e21 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPPT DC voltage range\u003c\/td\u003e\n\u003ctd\u003e120-440 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax efficiency (PV to grid)\u003c\/td\u003e\n\u003ctd\u003e97%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\n\u003ch4\u003eBattery \u0026amp; Grid\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery voltage range\u003c\/td\u003e\n\u003ctd\u003e40-60 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax charge\/discharge power\u003c\/td\u003e\n\u003ctd\u003e12,000 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax grid pass-through\u003c\/td\u003e\n\u003ctd\u003e90 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIdle consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;65 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-spec-group\"\u003e\n\u003ch4\u003ePhysical, Connectivity \u0026amp; Warranty\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (H×W×D)\u003c\/td\u003e\n\u003ctd\u003e30.5 × 22.3 × 11.3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure rating\u003c\/td\u003e\n\u003ctd\u003eNEMA 4X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eWiFi (included), cellular, Ethernet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax parallel units\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 12.5px; color: var(--muted) !important; margin-top: 18px !important;\"\u003eBattery certifications: UL 1973, UL 9540A; DC ESS UL 9540 with FlexBOSS21. Inverter certifications: UL 1741, UL 1741 PCS CRD, UL 3141.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"esk-scale\"\u003e\u003ch3\u003eAvailable Configurations\u003c\/h3\u003e\n\u003cp\u003eChoose the set that matches your load and storage needs. GridBOSS versions are available for 1-inverter sets.\u003c\/p\u003e\n\u003ctable class=\"esk-scale-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTier\u003c\/th\u003e\n\u003cth\u003eInverters\u003c\/th\u003e\n\u003cth\u003eBatteries\u003c\/th\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003cth\u003eMax Output\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"current\"\u003e\n\u003ctd class=\"tier\"\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e1×\u003c\/td\u003e\n\u003ctd\u003e1×\u003c\/td\u003e\n\u003ctd\u003e16 kWh\u003c\/td\u003e\n\u003ctd\u003e16 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e1×\u003c\/td\u003e\n\u003ctd\u003e2×\u003c\/td\u003e\n\u003ctd\u003e32 kWh\u003c\/td\u003e\n\u003ctd\u003e16 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e1×\u003c\/td\u003e\n\u003ctd\u003e3×\u003c\/td\u003e\n\u003ctd\u003e48 kWh\u003c\/td\u003e\n\u003ctd\u003e16 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003eLarge\u003c\/td\u003e\n\u003ctd\u003e2×\u003c\/td\u003e\n\u003ctd\u003e4×\u003c\/td\u003e\n\u003ctd\u003e64 kWh\u003c\/td\u003e\n\u003ctd\u003e32 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003eLarge\u003c\/td\u003e\n\u003ctd\u003e2×\u003c\/td\u003e\n\u003ctd\u003e6×\u003c\/td\u003e\n\u003ctd\u003e96 kWh\u003c\/td\u003e\n\u003ctd\u003e32 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tier\"\u003e3-Phase\u003c\/td\u003e\n\u003ctd\u003e3×\u003c\/td\u003e\n\u003ctd\u003e6×\u003c\/td\u003e\n\u003ctd\u003e96 kWh\u003c\/td\u003e\n\u003ctd\u003e48 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"esk-faq\"\u003e\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cdetails\u003e\u003csummary\u003eCan the batteries and inverter be installed outside?\u003c\/summary\u003e\u003cp\u003eYes. The 314Ah All-Weather battery is IP67 rated with built-in heaters, and the FlexBOSS21 is NEMA 4X. Both are designed for exterior wall mounting, and each battery includes an All-Weather conduit box for the wiring.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eI already have a grid-tied solar inverter. Can I add these batteries?\u003c\/summary\u003e\u003cp\u003eYes, with a GridBOSS set. The AC output of your existing grid-tied inverter connects to the GridBOSS GEN port (AC coupling), and the FlexBOSS21 and batteries store the surplus. Your existing panels and inverter stay in place. Confirm compatibility of your specific inverter model with our team before ordering.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat cables are included?\u003c\/summary\u003e\u003cp\u003eBattery-to-inverter power and communication cables, plus battery paralleling cables on sets with two or more batteries. One All-Weather conduit box is included per battery.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes the GridBOSS include breakers?\u003c\/summary\u003e\u003cp\u003eNo. The GridBOSS ships without breakers, which are sized to your installation and sourced locally by your installer.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat's the warranty?\u003c\/summary\u003e\u003cp\u003e10 years on the battery (or 10,000 cycles) and 10 years on the FlexBOSS21 inverter.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDo I need an electrician?\u003c\/summary\u003e\u003cp\u003eGrid-tied systems require permits and utility interconnection approval in most areas. Installation by a licensed electrician or solar installer familiar with your local code is recommended.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"esk-downloads\"\u003e\u003ch3\u003eDocuments \u0026amp; Downloads\u003c\/h3\u003e\n\u003cdiv class=\"esk-dl-block\"\u003e\n\u003cp class=\"esk-dl-group-title\"\u003eBattery - EG4 314Ah All-Weather\u003c\/p\u003e\n\u003cdiv class=\"esk-download-list\"\u003e\n\u003ca rel=\"noopener\" href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2025\/04\/EG4-Outdoor-314Ah-WallMount-Battery-Spec-Sheet.pdf\" class=\"esk-download\" target=\"_blank\"\u003eSpec Sheet\u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2025\/04\/EG4-Outdoor-314Ah-WallMount-Battery-User-Manual.pdf\" class=\"esk-download\" target=\"_blank\"\u003eUser Manual\u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2025\/04\/EG4-Outdoor-314Ah-WallMount-Battery-Quick-Start-Guide.pdf\" class=\"esk-download\" target=\"_blank\"\u003eQuick Start Guide\u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2026\/04\/EG4-WallMount-314Ah-All-Weather-Battery-1973-Certificate-of-Compliance.pdf\" class=\"esk-download\" target=\"_blank\"\u003eUL 1973 Certificate\u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2026\/01\/EG4-WallMount-314Ah-All-Weather-Battery-UL-9540A-VOC.pdf\" class=\"esk-download\" target=\"_blank\"\u003eUL 9540A Verification\u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2026\/08\/EG4-DC-ESS-for-Wallmount-314Ah-All-Weather-Battery-UL-9540-Certificate-of-Compliance.pdf\" class=\"esk-download\" target=\"_blank\"\u003eDC ESS UL 9540 Certificate\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"esk-dl-block\"\u003e\n\u003cp class=\"esk-dl-group-title\"\u003eInverter - EG4 FlexBOSS21\u003c\/p\u003e\n\u003cdiv class=\"esk-download-list\"\u003e\n\u003ca rel=\"noopener\" href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2024\/10\/EG4-FlexBoss21-Spec-Sheet.pdf\" class=\"esk-download\" target=\"_blank\"\u003eSpec Sheet\u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2024\/08\/FlexBOSS-21-Manual.pdf\" class=\"esk-download\" target=\"_blank\"\u003eUser Manual\u003c\/a\u003e \u003ca rel=\"noopener\" href=\"https:\/\/eg4electronics.com\/wp-content\/uploads\/2024\/11\/EG4-FlexBoss21-COC.pdf\" class=\"esk-download\" target=\"_blank\"\u003eUL1741 Certificate\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"esk-footer\"\u003e\u003cp class=\"esk-warranty\"\u003eBattery and inverter both backed by \u003cstrong\u003e10-year manufacturer's warranties\u003c\/strong\u003e.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"EG4","offers":[{"title":"1 inverter + 1 battery (16kW + 16kWh)","offer_id":67654307414071,"sku":"K0280","price":7549.0,"currency_code":"USD","in_stock":true},{"title":"1 inverter + 2 batteries (16kW + 32kWh)","offer_id":67654307446839,"sku":"K0281","price":11744.0,"currency_code":"USD","in_stock":true},{"title":"1 inverter + 3 batteries (16kW + 48kWh)","offer_id":67654307479607,"sku":"K0280-1I3B","price":15939.0,"currency_code":"USD","in_stock":true},{"title":"2 inverters + 4 batteries (32kW + 64kWh)","offer_id":67654307512375,"sku":"K0280-2I4B","price":23734.0,"currency_code":"USD","in_stock":true},{"title":"2 inverters + 6 batteries (32kW + 96kWh)","offer_id":67654307545143,"sku":"K0280-2I6B","price":32124.0,"currency_code":"USD","in_stock":true},{"title":"3 inverters + 6 batteries (48kW + 96kWh)","offer_id":67654307577911,"sku":"K0280-3I6B","price":35724.0,"currency_code":"USD","in_stock":true},{"title":"1 inverter + 1 battery + GridBOSS (16kW + 16kWh)","offer_id":67654307610679,"sku":"K0280-GB","price":9349.0,"currency_code":"USD","in_stock":true},{"title":"1 inverter + 2 batteries + GridBOSS (16kW + 32kWh)","offer_id":67654307643447,"sku":"K0281-GB","price":13544.0,"currency_code":"USD","in_stock":true},{"title":"1 inverter + 3 batteries + GridBOSS (16kW + 48kWh)","offer_id":67654307676215,"sku":"K0280-1I3B-GB","price":17739.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0566\/2418\/5399\/files\/eg4-314ah-all-weather-flexboss21-kit.webp?v=1792705460","url":"https:\/\/ecosolarkits.com\/products\/eg4-wallmount-48v-16kwh-all-weather-battery-ess-314ah-eg4-flexboss21-hybrid-inverter-grid-tied-system","provider":"Eco Solar Kits","version":"1.0","type":"link"}