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Green Mountain Power operates the most innovative utility battery program in the country. Lease 2 Powerwalls for $55/month, get up to $10,500 in BYOD incentives, or join a ~50 MW virtual power plant.
Lease Cost
$55/mo
2 Powerwalls
BYOD Max
$10,500
incentive
Waitlist
1,200+
people
VPP Capacity
~50 MW
distributed
GMP's flagship program: two Tesla Powerwall 3 units installed and maintained by GMP for a fixed monthly fee.
Why choose Enphase? 15-year warranty (vs. Powerwall's 10-year), modular design allows partial capacity during maintenance, and potentially shorter waitlist. Slightly less total capacity (20 kWh vs. 27 kWh).
1,200+ Person Waitlist
Demand for the GMP battery lease far exceeds supply. The waitlist has been growing consistently. Sign up now — the sooner you join, the sooner you receive your installation. GMP processes the waitlist on a first-come, first-served basis.
Already have a battery or want to choose your own? GMP pays you to enroll in the virtual power plant.
Solar retrofit bonus: $100/kW additional for adding battery to existing solar system
BYOD enrollment closes on September 30, 2026. After this date, the incentive may change or end. If you are planning to purchase a battery, enroll before the deadline to lock in current rates.
GMP's BYOD program accepts batteries from these manufacturers. All must be professionally installed and meet GMP's technical requirements.
Tesla
ALSO LEASEEnphase
ALSO LEASEDuracell
FranklinWH
SolarEdge
Generac
SunPower
Panasonic
Savant
Sonnen
Electriq
Brand list reflects GMP's approved BYOD partners as of 2026. New brands may be added. All batteries must meet GMP's interconnection and VPP communication requirements. Professional installation is mandatory.
GMP's VPP is one of the largest utility-managed distributed battery networks in the country. Here is how it works and why it matters.
GMP aggregates ~50 MW of distributed batteries into a virtual power plant. During peak demand, GMP dispatches stored energy to reduce grid stress and avoid expensive peaker plants.
Your battery provides backup during outages AND earns income during peak events. GMP prioritizes home backup during severe weather.
Reduces need for fossil fuel peaker plants, stabilizes grid during heat waves and cold snaps.
With declining net metering rates, shifting energy from export to self-consumption becomes more valuable every year. A battery effectively hedges against future NM rate cuts by keeping more solar energy in your home.
Side-by-side comparison to help you decide which GMP battery program fits your situation.
| Feature | Lease | BYOD |
|---|---|---|
| Monthly Cost | $55/month | $0 (you buy battery) |
| Upfront Cost | $0 (or $5,500 one-time) | $12,000-24,000 (battery purchase) |
| GMP Incentive | Included in lease pricing | $850-950/kW + $100/kW solar bonus |
| Max Incentive | N/A | $10,500 |
| Capacity | 27 kWh (Powerwall) or 20 kWh (Enphase) | Your choice (5 kW min) |
| Ownership | GMP owns batteries | You own batteries |
| Maintenance | GMP handles everything | Your responsibility |
| Contract Term | 10 years | No term (one-time enrollment) |
| Warranty | GMP covers for 10 years | Manufacturer warranty (10-15 years) |
| Deadline | Ongoing (waitlist) | September 30, 2026 |
| Best For | Low upfront cost, hands-off | Long-term value, ownership |
Everything you need to know about GMP's battery lease, BYOD, and virtual power plant.
Green Mountain Power offers two battery programs: (1) A lease program where GMP installs and maintains 2 Tesla Powerwall 3 units (27 kWh) or 2 Enphase IQ Battery 10C units (20 kWh) at your home for $55/month or $5,500 upfront over a 10-year term. (2) A BYOD (Bring Your Own Device) program that pays $850-$950 per kW for qualifying batteries you purchase, up to $10,500. Both programs require batteries to participate in GMP's virtual power plant.
As of 2026, the GMP Powerwall lease waitlist has 1,200+ people. Wait times vary but can be several months. GMP is actively expanding the program but demand consistently outpaces installation capacity. The Enphase option may have a shorter wait. Contact GMP directly for current wait time estimates.
BYOD (Bring Your Own Device) pays $850/kW for 3-hour batteries or $950/kW for 4-hour batteries, with an additional $100/kW solar retrofit bonus for adding a battery to an existing solar system. The maximum incentive is $10,500. Minimum battery size is 5 kW. The enrollment deadline is September 30, 2026.
GMP BYOD accepts 11 battery brands: Tesla, Enphase, Duracell, FranklinWH, SolarEdge, Generac, SunPower, Panasonic, Savant, Sonnen, Electriq. All must be professionally installed and meet GMP's technical requirements for VPP participation. Check with GMP for the latest approved model list, as new models are added periodically.
GMP aggregates approximately 50 MW of distributed batteries across thousands of Vermont homes into a virtual power plant. During peak demand events (summer heat waves, winter cold snaps), GMP can dispatch stored energy from participant batteries to reduce grid stress and avoid expensive peaker plants. Your battery prioritizes home backup during severe weather. GMP compensates through the lease pricing or BYOD incentive.
Yes. The GMP battery lease program does not require solar panels. The battery charges from the grid during off-peak hours and provides backup during outages. However, pairing with solar significantly improves the economics — solar charges the battery for free during the day, reducing grid dependence and increasing self-consumption value.
The lease is competitive. Two Tesla Powerwall 3 units would cost approximately $15,000-20,000 to purchase and install. The 10-year lease cost is $6,600 ($55/month x 120 months) or $5,500 upfront — significantly less than purchase price. However, you do not own the batteries at the end of the lease, and GMP can dispatch them during peak events. For ownership, the BYOD program reduces your purchase cost by up to $10,500.
Yes, moderately. A battery increases self-consumption from approximately 70% to 85-90%. Since self-consumed solar saves the full retail rate ($0.2146/kWh for GMP) while exported solar earns only the NM rate (~$0.1439/kWh), each kWh shifted from export to self-consumption gains about $0.07/kWh. For a 10 kW system producing 11,750 kWh/year, shifting 15-20% more to self-consumption adds approximately $120-165/year in additional value.
During a power outage, both lease and BYOD batteries automatically switch to backup mode, powering essential circuits in your home. GMP prioritizes home backup during severe weather events. Your backup duration depends on battery capacity and your consumption — 27 kWh (Powerwall lease) can power average essentials for 8-12+ hours. If paired with solar, the battery recharges during daylight, potentially providing indefinite backup in mild weather.
Yes. GMP offers time-of-use (TOU) rates with off-peak at $0.1452/kWh and on-peak at $0.3407/kWh (weekdays 4-9 PM). A battery can charge during off-peak hours and discharge during peak hours, saving $0.1955/kWh per cycle. Combined with solar charging during the day, TOU arbitrage adds approximately $100-200/year in value. GMP's TOU rate is optional — you must enroll.
Pair your battery knowledge with these essential VT solar resources.
Pricing for all 8 VT markets
Read moreCategory rates and PUC cuts
Read moreHow VT solar works with no ITC
Read moreWhich financing + battery combo?
Read moreSales + property tax savings
Read moreSee battery + solar pricing
Read moreWith 1,200+ people ahead of you, every day counts. Get a solar + battery quote and we will help you navigate the GMP program.
BYOD deadline: September 30, 2026. Lease waitlist growing daily. Solar + battery = maximum self-consumption and resilience.