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We serve MA, NH, CT, RI, ME, VT, NJ, PA, and TX
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NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteYour utility rate plan, solar panels, battery, and EV charger all interact. The wrong rate plan can cost you hundreds per year. Use our optimizer to find the ideal combination for your setup.
TOU + Flat + Tiered
9 States
Solar + Battery
EV Scheduling
Choose your state and utility. We load their actual rate structures.
Tell us if you have solar, a battery, or an EV to model savings.
See flat, TOU, and tiered plans side-by-side with your setup.
Get your optimal rate plan, battery schedule, and EV strategy.
Tell us about your utility, equipment, and usage to find your optimal rate plan
If you can shift even 20% of your usage to off-peak hours, TOU plans typically save $200-500/year. With a battery doing the shifting automatically, you save without changing your habits.
Every kWh you use directly from your panels avoids the full retail rate. With poor net metering (like Texas), self-consumption can be worth 2-3x more than exporting to the grid.
Charge cheap, discharge expensive. A 13.5 kWh battery cycling daily with a $0.20/kWh spread generates $400-800 in annual arbitrage value on top of backup protection.
An EV adds 3,000-4,000 kWh/year to your usage. Charging at peak rates vs. super-off-peak can mean $300-600/year in unnecessary costs. A smart charger schedule eliminates this.
Solar locks in your generation cost at $0/kWh. A battery lets you use that free electricity during the most expensive hours of the day.
As utility rates increase 3-5% annually, the value of your stored solar increases too. Your battery arbitrage gets more valuable every year.
Maximize self-consumption to minimize grid dependence. In states with poor net metering, a battery can double the value of your solar panels.
A time-of-use rate charges different prices per kWh depending on the time of day. Peak hours (typically 1-9 PM) cost 50-100% more than off-peak hours (overnight). If you can shift consumption to off-peak — by charging your EV at night or running a battery during peak — you pay significantly less for the same electricity.
Solar panels produce most of their electricity during midday, which often overlaps with peak rate hours. On a TOU plan, the electricity your solar panels produce during peak hours offsets the most expensive electricity you would otherwise buy. With a battery, you can store midday solar and discharge it during the evening peak for even greater savings.
Battery arbitrage means charging your battery when electricity is cheap (off-peak or from solar) and discharging when electricity is expensive (peak hours). The value depends on the peak-to-off-peak price spread. In New England, where spreads can exceed 20 cents/kWh, a 13.5 kWh battery can save $400-800+ per year from arbitrage alone.
On a TOU rate, always charge at night during super-off-peak hours (typically 11 PM - 6 AM) when rates are lowest. This alone can save $200-400 per year compared to charging whenever you get home. If you have solar panels, midday charging can also be cost-effective since you are using free solar electricity.
A demand charge is based on your peak power draw (kW) in a billing period, not total energy consumed (kWh). While most common for commercial customers, some Texas utilities and a few others apply demand charges to residential accounts. A battery can reduce your demand charge by "peak shaving" — discharging during your highest usage moments.
Net metering determines the value of solar electricity you export to the grid. Full retail net metering (1:1 credit) means exports are worth the same as what you pay. Some states like Rhode Island credit at 80% of retail, while Texas (ERCOT) provides no mandatory net metering at all. Lower net metering credits make battery storage more valuable since self-consumption becomes the better economic choice.