Whole House Solar Systems

Whole House Solar System: How to Size One That Actually Runs Everything

A whole house solar system is a battery-based setup large enough to carry the main breaker panel, not just a fridge and a few lights. That means a 120/240V split-phase inverter for the well pump, dryer and air conditioning, enough LiFePO4 battery to get through the night, and a panel array that refills it the next day.

This collection holds 157 products from Sungold Power, EG4, BigBattery, Anker and Bluetti. Entry points start at $1,699 for a Bluetti Apex 300 that grows into home backup, move through $3,145 to $5,518 for Sungold Power off-grid kits with panels included, and reach $15,725 for a 16,000W Sungold Power system with 25.6kWh of storage and 32 panels.

How to choose a whole home solar system

• Grid-tied or off-grid. With utility service, a hybrid system like the EG4 WallMount 16kWh + FlexBOSS21 Grid-Tied System gives 16kW of output with PV and grid combined, 21kW of solar input and a UL 9540-eligible pairing for permits. Without utility service, the Sungold Power SGR kits and the EG4 314Ah All-Weather + 6000XP system are built to run alone.
• Inverter output. Add the loads that run at once. 6,000W to 8,000W covers most homes without central air: the Sungold Power 8,000W Off-Grid Kit SGR-8K10E is the typical mid-sized home starting point. Central air plus a well pump and kitchen calls for the 16,000W SGR-16K25E or the FlexBOSS21 pairing.
• Battery hours. 10.24kWh runs a fridge, lights, electronics and a furnace blower overnight. 16kWh (12.86kWh usable, as EG4 states) adds margin. 25.6kWh covers a cloudy day. Modular stations scale too: the Bluetti Apex 300 grows from 2,764.8Wh to 58kWh, and the Anker SOLIX F3800 Plus to 53.8kWh.
• Panels included or not. Sungold Power kits ship with panels (eight 415W in the SGR-8K10E). The EG4 and BigBattery systems are inverter plus battery; you add the array.
• Transfer speed. The Bluetti Apex 300 switches to battery in 0ms and the EG4 6000XP under 15ms, so computers and routers stay up during an outage.

Popular picks in this collection

Sizing tips

• Start with the Solar Kit Calculator. Enter every appliance and your ZIP code; it returns inverter, battery and panel sizes for your sun hours, the proper way to size a whole house solar power system.
• Check 240V loads first. The HUSKY 2 kits with Victron MultiPlus-II are 120V systems; a well pump or dryer needs the split-phase Sungold Power, EG4 or Bluetti options.
• Count usable, not nominal, capacity. EG4 rates its 16kWh battery at 12.86kWh recommended usable; plan overnight loads against that number.
• Measure roof or yard space before choosing a kit with 32 panels.
• If a permit and inspection are involved, the EG4 FlexBOSS21 pairing is listed as UL 9540-eligible.

Frequently asked questions

Can a whole house solar electric system run central air conditioning? Yes, with enough inverter and battery. The 16,000W Sungold Power system and the 16kW FlexBOSS21 pairing are sized for that; a 5,000W or 6,000W system will run a window unit or mini-split, not a large central compressor plus everything else.

Do I need the grid at all? No. The Sungold Power SGR kits and the EG4 6000XP system are off-grid designs. Hybrid systems use the grid as a charging source and backup, which means a smaller battery for the same comfort.

Is a portable power station enough for whole house solar? As a starting point. The Bluetti Apex 300 runs 120V and 240V loads at the same time, and both it and the Anker SOLIX F3800 Plus expand with add-on batteries, but a permanent 48V inverter with a wall or rack battery is the better long-term whole home solar setup.

Every system ships free to the mainland US from our brand partner warehouses, usually within a few business days, with 30-day returns. Send us your load list and we will check it against these kits before you commit.