EG4 6000XP vs 12000XP: Which Off-Grid Inverter Fits Your Cabin or Cottage?
The EG4 6000XP and 12000XP are the two off-grid inverters we install most often. One suits bunkies and seasonal cottages, the other runs full-time homes and shops. Here is how to choose.
TRU Off Grid · October 16, 2026
Two Inverters, Two Jobs
Both are all-in-one off-grid inverters: the inverter, the solar charge controller and the battery charger in one unit. Both run on 48 V EG4 batteries and give you a standard 120/240 V supply, like a home on the grid. The difference is how much they can power.
Side by Side
| EG4 6000XP | EG4 12000XP | |
|---|---|---|
| Continuous output | 6,000 W | 12,000 W |
| Max solar input | 8,000 W | 24,000 W |
| Output | 120/240 V split phase | 120/240 V split phase |
| Battery | 48 V (EG4 14.3 kWh) | 48 V (EG4 14.3 kWh) |
| Parallel units | Yes | Yes, up to 16 |
| Inverter warranty | 5 years | 5 years |
| Best for | Bunkies, seasonal cottages, small cabins | Full-time homes, large cottages, shops |
When the 6000XP Is the Right Fit
The 6000XP suits bunkies, seasonal cottages, hunt camps and small cabins: lights, a fridge, a water pump, electronics and the odd power tool. Paired with one or two 14.3 kWh EG4 batteries and a modest solar array, it covers most three-season properties. Our lakefront cottage install in cottage country runs on a 6000XP with EG4 batteries and a metal-roof solar array.
When to Step Up to the 12000XP
Choose the 12000XP for full-time off-grid homes, larger cottages and workshops, or anywhere with a well pump, a large shop tool, air conditioning or electric cooking. It handles twice the power and three times the solar, and you can run several in parallel as the property grows. Our off-grid workshop install runs a 12000XP with three 14.3 kWh batteries in a fully conduited battery wall.
Batteries and Winter
Both inverters use EG4 14.3 kWh LiFePO4 batteries with a 10-year warranty. LiFePO4 batteries cannot charge below freezing, so an unheated cottage needs a plan for winter: a heated battery, a protected indoor spot, or a system that is shut down properly for the season. We cover this at the site visit.
No Good Indoor Spot? Go Outdoor
If the building has no room for an indoor battery wall, we use the EG4 FlexBOSS18 inverter with the EG4 All-Weather 14.3 kWh battery. Both are rated for outdoor mounting, like our off-grid log cabin install where the whole system lives on the exterior wall by the lake.
Adding a Generator
Most full-time off-grid systems include a backup generator for long cloudy stretches in winter. Use an inverter-type generator with a 2-wire start, and the 12000XP can start and stop it automatically based on battery level. We supply and wire BE Power inverter generators for exactly this.
Rebates for Off-Grid?
Ontario's Home Renovation Savings rebate only applies to grid-connected homes, so true off-grid systems do not qualify. That is why we size off-grid systems carefully: the right inverter and battery bank the first time, with room to add more later.
Plan Your Off-Grid System
TRU Off Grid designs and installs EG4 off-grid systems for cottages, cabins, shops and remote properties across Ontario, usually as three options sized to your needs and budget. Call Jacob Collier at 647-914-9699 or email jacob@truoffgrid.com with a list of what you want to run.
