How PNM net metering works in 2026
Net metering means your meter accounts for what you send back as well as what you pull in. With PNM, surplus production does not come back as a monthly check — it banks on the account as kilowatt-hours you can draw against later. Three specifics decide whether that arrangement is worth designing around:
| Residential customer charge | $11.93 per month |
|---|---|
| kWh banking eligibility | Systems with an inverter rated 10 kW AC or smaller |
| Banked kWh at account closure | Cashed out at avoided cost |
The customer charge is the part people miss. It is a fixed monthly amount you pay for being connected, and it does not shrink because your array had a good month. Grid-tied solar reduces a bill; it does not eliminate one.
The 10 kW AC ceiling is on the inverter rating, not on panel wattage — which is worth knowing before you design a large array. Bigger systems can still interconnect, but the banking terms described here are not what applies to them, and we are not going to summarize terms we have not verified. Ask PNM in writing what applies to your size.
Avoided cost, the third line, is what banked kilowatt-hours are worth when you close the account. Avoided cost is the utility’s own cost of that energy, which is not the retail price you would have paid for it. The design implication is simple: size a grid-tied system to cover what you actually use, and treat banked kWh as something to consume seasonally, not as a savings account.
Where staying grid-tied wins
- The line is already there. If the meter exists, the cheapest storage you will ever buy is the grid — no battery bank, no autonomy-day math.
- Lower upfront cost. Batteries are the single biggest line in an off-grid budget. Skipping them takes a large bite out of the install price.
- Less to maintain. No battery replacement horizon, no generator to service, fewer components with a service life you have to plan around.
- Seasonal smoothing is free. Long overcast stretches and winter production dips are the grid’s problem instead of yours.
- You can add batteries later. Backup storage on a grid-tied home is a second phase, not a decision you must make on day one.
Where going off-grid wins
- Line extension cost. The number that decides most of these cases is what the utility quotes to bring service to the parcel. It is priced per property — distance, terrain, and easements — so we will not print a figure here. Get it in writing early, because on remote acreage it can rival the cost of a complete battery system.
- Easements you do not control. A line that has to cross a neighbor or state land turns into a schedule problem as much as a cost problem. Batteries do not need permission.
- No monthly account. No customer charge, no rate case, no meter. Your operating cost becomes maintenance and an eventual battery replacement you can plan for.
- Outage independence. A correctly sized off-grid system with generator integration keeps a well pump and a freezer running through weather that takes the grid down.
- You are already opening the ground. On raw land being developed for a well, water line, and septic, the trenching and site work are happening anyway. Adding solar to that mobilization is cheaper than doing it as a separate project later.
The honest comparison
| Grid-tied with net metering | Off-grid with batteries | |
|---|---|---|
| Upfront cost | Lower — no battery bank required | Higher — storage is the largest line item |
| Monthly cost | $11.93 customer charge, plus net energy used | No utility bill; budget for maintenance and battery replacement |
| Storage | The grid, banked as kWh (inverter ≤ 10 kW AC) | Batteries you own and size yourself |
| During an outage | Down, unless battery backup was added | Unaffected |
| Paperwork | Interconnection agreement plus permits and inspection | Permits and inspection; no utility agreement |
| Typical fit | Service already at the property, ordinary loads | Remote parcels, expensive line extensions, full independence |
How to decide, in three numbers
- The line-extension quote. Ask the utility what it costs to serve the parcel, in writing, before you design anything. Everything else is downstream of that figure.
- An off-grid quote for the same loads. Our published DIY kit prices and the real contract values from our 2026 installs are in the off-grid cost guide, and the estimator will size a system for your property in a few minutes.
- Your actual consumption. Past bills if you have them, an honest appliance list if you do not. Both paths are priced off the same load profile, so this is the number that makes the comparison fair.
There is a middle option worth naming: where the grid is already present, a grid-tied array with a modest battery for backup gets you outage coverage without funding full autonomy. We build all three configurations, and we will tell you when the one you asked for is not the one your site calls for.
One New Mexico-specific note that applies either way: the state’s gross receipts tax deduction for solar under NMSA 1978 § 7-9-112 is about the sale and installation of the system, not about how it connects. See the gross receipts tax guide for how that should show up on your quote.