Your solar questions, answered straight.
No jargon, no upsell — clear answers about solar, storage, EV, generators and electrical in Minnesota, organized by topic.
Jump in below, or call (651) 565-1140 for a real local answer. Still curious about a term? Browse the solar glossary.
Getting started
Does solar really work in Minnesota winters?
Yes. Panels run on light, not heat, so cold, clear days are very productive. Snow slides off the smooth, angled glass on its own, and we size every system for the full Minnesota year — your summer surplus banks against winter through net metering.
Is solar worth it for my home?
For most Minnesota homeowners, yes — you stop renting power at a price the utility keeps raising and lock in your own rate for decades. We give you an honest, no-pressure assessment so you decide on real numbers, not a sales pitch.
Is the assessment really free and no-pressure?
Yes. We review your roof, shading, usage and bill and give you a straight answer — even if that answer is that solar isn't the right fit for you right now.
Will solar work on my roof?
Most Minnesota roofs are good candidates. South is best, but east- and west-facing roofs produce well too, and per-panel microinverters keep the array producing even if part of the roof is shaded. Asphalt, metal and flat roofs all work.
How long will the system last?
Quality panels are warrantied for performance out to 25 years and keep producing well beyond that, degrading under ~0.5% a year — and your iSolar system is backed by a 30-year Solar Insure warranty.
Cost, savings & payback
How much can I save?
It depends on your usage, your utility rate and your roof, but a well-sized owned system offsets the large majority of a typical home's bill. We model your real numbers in a free assessment.
What's the payback period?
For homes, payback comes from energy savings (the federal residential credit ended in 2025) and varies with your bill and system cost. Commercial and agricultural systems pay back far faster — often 3–6 years — thanks to the 30% ITC and depreciation.
How is your production estimate different from other quotes?
We quote honestly. Instead of the inflated lab figure (PVWatts at ~145%), we factor in real-world losses — roughly 16% for snow, heat and shading — so the savings number in your proposal is one you can actually count on.
Does solar add value to my home?
Studies show homes with owned solar sell for around 4% more on average — and in Minnesota the added value is exempt from property tax, so your assessment doesn't rise because of the system.
Incentives & financing
Is there still a federal tax credit for home solar?
No. The federal residential solar tax credit ended December 31, 2025, so there's no federal credit for a new homeowner-owned system in 2026. We never bake a credit that doesn't apply into your quote.
So how does home solar still pay in Minnesota?
Through net metering (surplus credited at the retail rate), Xcel Solar*Rewards where available, and the Minnesota sales-tax and property-tax exemptions — plus locking in your rate against future increases.
Do you offer leases or PPAs to homeowners?
No — we're ownership-first for homes (cash or loan), so you keep all the savings, incentives and resale value. We don't do residential leases or PPAs in Minnesota.
Is there low-cost solar for income-qualified families?
Yes — through Xcel's Solar*Rewards Income-Qualified program, eligible families can go solar at little to no cost. iSolar has done this work since 2020.
What financing do you offer?
Pay cash for the best lifetime return, or finance through established solar lenders (Affinity, One Ethos, MNCEE) — often with little or nothing down. We'll show the cash price next to the financed price so you see the true cost.
Commercial & agricultural solar
How fast does commercial solar pay back?
With the 30% ITC, MACRS depreciation and Xcel Solar*Rewards, many Minnesota commercial systems pay back in roughly 3–6 years, then produce essentially free power for decades.
Is the 30% ITC going away?
It's time-limited — under current law a commercial or agricultural project generally must begin construction by July 4, 2026 (or be in service by Dec 31, 2027) to claim it. Starting now is how you lock it in.
Can solar cut our demand charges?
Solar cuts energy charges directly; trimming demand charges (the $/kW peak that can be 30–60% of a commercial bill) usually takes battery storage sized to your load. We model both.
We're a school or nonprofit with no tax liability — can we benefit?
Yes — through elective (“direct”) pay for the ITC value, a PPA, and Minnesota's Solar for Schools / public-building grant programs. We built the Edina City Hall array this way.
What about USDA REAP for farms?
REAP grants are paused and under federal review in 2026 (loan guarantees remain). We track current status and tell you exactly where it stands — we never promise a grant that isn't there.
Do you offer PPAs for commercial or agricultural projects?
Yes — for some commercial and agricultural projects we offer power-purchase agreement (PPA) options, alongside cash, loan and C-PACE. We'll show a PPA next to ownership so you can compare.
Equipment & installation
What equipment do you install?
Premium Tier-1 panels with Enphase IQ8 microinverters on engineered, flashed racking. We recommend only equipment we'd put on our own homes, and we're manufacturer-certified across the brands we install.
Why microinverters instead of a string inverter?
Each panel produces independently, so shade on one panel doesn't drag down the rest. You get per-panel monitoring, built-in rapid-shutdown safety, and no single inverter to fail in year 12.
Do you use subcontractors?
No — the same licensed local crew that starts your job finishes it: design, permitting, installation, electrical and commissioning, all in-house.
Is everything permitted and inspected?
Always — electrical and building permits, a code inspection, and the utility interconnection and net-metering application. We handle all of it.
How long does the install take?
Most residential installs take a day or two on site; the full timeline from signed proposal to power-on is usually a few weeks, driven mostly by permitting and utility interconnection.
Battery & backup
Will a battery power my whole house in an outage?
We size storage to what matters to you — from essentials (fridge, furnace, internet, well pump) up to whole-home backup.
How big a battery do I need?
Essentials only is roughly 5–10 kWh usable; essentials plus HVAC about 13–20 kWh; whole-home 20–40 kWh. Oversizing is the most common way people overspend on storage.
Can I add a battery to existing solar?
Usually yes — many systems are battery-ready, and we'll confirm compatibility and design the addition.
Does a battery save money in Minnesota?
Here it's mostly about backup and self-use, since Minnesota net-meters at the retail rate. We'll show you the honest value for your situation.
Which batteries do you install?
Leading systems including Tesla Powerwall, Enphase IQ Battery, EG4, Sol-Ark and HomeGrid — matched to your home, with a separate 20-year Solar Insure battery warranty.
EV charging
How fast will my EV charge at home?
A Level 2 charger adds roughly 20–40 miles of range per hour — a full charge overnight for almost any EV.
Do I need an electrical upgrade for an EV charger?
Sometimes. Our licensed electricians check your panel capacity and either confirm you're fine, add a circuit, recommend an upgrade, or use load management.
Can I power my EV from my solar?
Yes — we can size your array for the added miles and set you up to charge midday on your own solar.
Which EV chargers do you install?
We're certified to install all the major brands — Tesla, ChargePoint, Wallbox, Enphase, Emporia, Grizzl-E, Autel and more — hardwired or plug-in, including detached garages.
Generators & resilience
Should I get a generator or a battery?
A battery is silent, maintenance-free and recharges from solar but has finite runtime; a standby generator runs as long as it has fuel, ideal for rare multi-day outages. Many homes pair both.
What size standby generator do I need?
Residential units typically run 8–26 kW — essentials-only around 10 kW, whole-home with central AC ~22–26 kW. We size to your loads.
Natural gas or propane?
Natural gas where you have a line (effectively unlimited runtime); propane where you don't, with runtime set by tank size.
Which generators do you install?
We're certified on the major standby brands, including Generac and Kohler, with automatic transfer.
Warranty, monitoring & service
What does the 30-year Solar Insure warranty cover?
30 years of parts and labor on your panels, microinverters, optimizers and racking, plus roof reseal/reflash within 3″ of penetrations and ongoing monitoring — with a $0 deductible.
Is my battery covered too?
Yes — a separate 20-year Solar Insure battery warranty pairs with the 30-year solar warranty.
What if iSolar isn't around in 30 years?
Solar Insure is a third-party warranty insurance-backed by Zurich, so your coverage continues regardless of the installer — it even steps in if a manufacturer defaults.
Does the warranty transfer if I sell my home?
Yes — it's assigned to your address and transfers to the new owner at $0, which can help resale.
Do my panels need cleaning or snow removal?
Rarely — Minnesota rain and snow-shed keep them clean, and cleaning recovers only a few percent of output. Please don't climb on your roof; if something needs attention, that's what we're for.
Can you service a system another company installed?
Yes — including orphaned systems whose installer is gone. We transfer the monitoring/maintainer account (Enphase, SolarEdge, Tigo) into our name and become your local service contact.
Roof, snow & detach / reset
What if I need a new roof under my panels?
We detach and reset them: we remove the array, our roofing family (Three Rivers Contracting) replaces the roof, and we reinstall and recommission — one call, one schedule, no finger-pointing.
How much downtime is there for a roof job?
Typically a business week, with the system de-energized only during the roofing days. We coordinate solar and roof on one schedule to keep that window short.
Will detach & reset protect my roof and warranties?
Yes — we use full ice & water shield under the array and manufacturer-approved flashed mounts, reinstalling to spec so both your roof warranty and your solar warranty stay intact.
My roof damage is an insurance claim — can you help?
Yes, and it's rare in solar. Three Rivers Contracting is a licensed general contractor experienced with insurance claims — we document hail/wind damage, work with your adjuster, and run the roof and detach & reset as one claim.
Ground mounts, carports & off-grid
What types of ground mounts do you build?
All of them — pile-driven, ballasted, earth-anchored and poured-footing foundations, with fixed-tilt, adjustable-tilt, single-axis tracker or dual-axis tracker designs. We match the mount to your soil, site and goals. See our carports & ground mounts page.
Do you build solar carports?
Yes — a solar carport covers parking while generating power, and pairs naturally with EV charging. Great for businesses, schools, municipal lots and the right homes.
Can you set up a full off-grid system?
Yes — solar, battery and generator built around Sol-Ark or EG4 hybrid inverters, using east-west arrays and adjustable tilt to balance production. See our off-grid solar page.
How does the solar savings calculator work?
Enter your home size, roof direction and shading and it estimates your system size, install cost and 30-year savings using real Minnesota production data. It's a ballpark — a free assessment gives exact numbers.
Didn't find your answer?
Ask us anything — a free, no-pressure assessment comes with straight answers for your home, farm or business.
