The Minnesota Home Battery Guide: Brands, Sizes, Real Numbers
A home battery does two very different jobs. Knowing which one you want makes every other decision easy.
Before brands and kilowatt-hours, answer one question: do you want backup power during outages, self-consumption (using more of your own solar at night), or both? It changes how big a battery you need and how it’s wired.
Backup vs. self-consumption
- Backup: keep essential circuits — or the whole home — running when the grid fails. Size to how long and how much you want to cover.
- Self-consumption: store daytime solar to use in the evening, leaning less on the grid. Most valuable where net-metering credit is weak.
How much capacity?
Essential-load backup (furnace fan, fridge, lights, internet, well pump) often lands around 10–20 kWh. Whole-home or multi-day resilience can mean 30 kWh+. We size to your actual loads — see battery sizing or our battery tool.
The brands we install
Enphase IQ Battery (modular, pairs with Enphase solar), Tesla Powerwall, and EG4 / HomeGrid / Sol-Ark-based stacks for larger or hybrid systems. All are lithium-iron-phosphate (LFP) chemistry in the configurations we favor — safe and long-cycle.
Don’t forget the warranty
Batteries are the newest part of the system, so coverage matters. iSolar pairs storage with a separate 20-year Solar Insure battery warranty alongside the 30-year solar warranty — whole-system protection, no gaps.
Frequently asked.
How many kWh do I need?
Essential-load backup is often 10–20 kWh; whole-home or multi-day is 30 kWh+. We size to your real loads, not a quota.
Which battery brand is best?
The best one depends on your inverter and goal. Enphase suits microinverter homes; Sol-Ark/EG4 suit large hybrid and off-grid builds; Powerwall is a solid all-rounder.
Have a question we haven't covered?
Talk to a local iSolar expert — free, no pressure. Call (651) 565-1140.