Smart Thermostats / Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) vs Sensi Lite (ST25)
Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS)
$159.00
VSSensi Lite (ST25)
$79.00
Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) vs Sensi Lite (ST25)
Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS)
The default smart thermostat for electric baseboard heat — and it will not run a furnace.
Wins overall by 0.0 points
Quick Verdict
This is close. The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) edges ahead by 0.0 points, but that margin is inside the noise — the Sensi Lite (ST25) is a defensible pick on its own terms. The cheapest truly C-wire-free thermostat — until you own a heat pump, and then it isn't.
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) and Sensi Lite (ST25) are both closely matched smart Thermostat models, and the Sensi Lite (ST25) is $80 cheaper than the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) ($79 vs $159). On HVAC Coverage, the Sensi Lite (ST25) leads (6.5 vs 3.0/10) — stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals. On Installation, the Sensi Lite (ST25) leads (8.5 vs 5.5/10) — wiring complexity, guided setup, and how likely a DIY install is to end in a service call. On Multi-Room Sensing, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) leads (3.5 vs 1.0/10) — remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature. Overall, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) scores 5.9/10 across our 8 scoring categories versus 5.9/10 for the Sensi Lite (ST25), though the gap is close enough that your specific use case should decide it. Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) | Sensi Lite (ST25) |
|---|---|---|
| Price | $159.00 | $79.00 |
| Release Year | 2021 | 2023 |
| System Voltage | Line voltage 120V or 240V AC, 16A maximum — 3,800W at 240V or 1,900W at 120V, on a 20A breaker. This is the opposite of every 24V thermostat here; a low-voltage model will not run baseboard heat and this will not run a furnace | Low voltage 24VAC (20-30VAC, 50/60Hz). Not for 120/240V line-voltage heat |
| C-Wire Required | Not applicable — line-voltage thermostats have no C wire. It does need both line conductors (L1 and L2/neutral) present in the box, so a two-wire switch loop will not work | Mostly no — and Copeland is unusually honest about the exception. Its own product title reads 'C-Wire Not Required, Except On Heat/Cool Only and Heat Pump Systems', and the manual confirms heat-only, cool-only and heat pump systems all need a common wire |
| Adapter / Power Kit Included | Not applicable | No adapter is included, and none is needed on the majority of conventional systems |
| Heating & Cooling Stages | Heating only, on/off line-voltage switching. No cooling and no staging | 2H/1C or 1H/2C, single and multi-stage, gas, oil or electric. Ten terminals: R, C, W/E, G, Y, O/B, Y2, W2, L and AUX, rated 1.5A per terminal and 2.5A total |
| Heat Pump & Aux Heat | No. Mysa states it does not work with 24V furnaces or central air, millivolt systems, central hydronic boilers, or electric in-floor heating, which needs a different Mysa product | Yes — heat pump 2H/1C, and the manual lists dual fuel and zone valve configurations. A heat pump does need a C wire on this model |
| Humidifier / Ventilator Terminals | None | None — no humidifier, dehumidifier or ventilator output |
| Remote Sensors | None. Mysa's model is one thermostat per heater circuit, so each room is its own zone rather than a sensor network | None. Copeland states only the Sensi Touch 2 works with Sensi Room Sensors |
| Occupancy Detection | Light and proximity sensors wake and dim the display on the V2. Away control is app geofencing. There is no room occupancy sensing | None. Away control is geofencing from your phone only |
| Matter Support | Not listed for the baseboard models. Mysa's own Matter article covers the central-HVAC Smart Thermostat and says Matter is 'expected in early 2026 via firmware update' | No |
| Voice & Smart Home Platforms | Mysa app, Apple HomeKit, Amazon Alexa, Google Home | Sensi app, Amazon Alexa, Google Assistant, Samsung SmartThings. No Apple Home |
| Utility Rebates & Demand Response | Mysa states both baseboard models support utility demand-response programs, and the V2 is stocked across US utility rebate marketplaces | ENERGY STAR certified, rated for about 23% HVAC energy savings, and stocked across US utility rebate marketplaces |
| Account or Subscription Needed | No subscription — Mysa markets the app as 100% free | No subscription. A free Sensi account is required |
| Warranty | 60 months | 36 months |
| Colors | White | Black (ST25), White (ST25W) |
Category Scores
C-Wire Freedom
The Sensi Lite (ST25) leads clearly here, 8.0 against 7.5 — a 0.5-point margin on how likely this thermostat is to run on the wiring you already have — whether it needs a common wire, and whether the workaround is in the box, sold separately, or an electrician's visit. The single biggest cause of returns in this category.. If that is what you are buying for, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) does not close the gap elsewhere.
HVAC Coverage
The Sensi Lite (ST25) leads clearly here, 6.5 against 3.0 — a 3.5-point margin on stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals. If that is what you are buying for, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) does not close the gap elsewhere.
Multi-Room Sensing
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) leads clearly here, 3.5 against 1.0 — a 2.5-point margin on remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature. If that is what you are buying for, the Sensi Lite (ST25) does not close the gap elsewhere.
Smart Home Integration
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) leads clearly here, 6.5 against 4.0 — a 2.5-point margin on matter, Apple Home, Alexa and Google support — and how much each one actually exposes. If that is what you are buying for, the Sensi Lite (ST25) does not close the gap elsewhere.
Scheduling & Learning
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) leads clearly here, 7.0 against 5.0 — a 2.0-point margin on learning, geofencing, away detection and how much of it works without babysitting the app. If that is what you are buying for, the Sensi Lite (ST25) does not close the gap elsewhere.
Display & On-Device Control
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) leads clearly here, 7.5 against 5.0 — a 2.5-point margin on screen quality and how much you can do at the wall instead of in the phone app. If that is what you are buying for, the Sensi Lite (ST25) does not close the gap elsewhere.
Installation
The Sensi Lite (ST25) leads clearly here, 8.5 against 5.5 — a 3.0-point margin on wiring complexity, guided setup, and how likely a DIY install is to end in a service call. If that is what you are buying for, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) does not close the gap elsewhere.
Value
The Sensi Lite (ST25) leads clearly here, 9.0 against 7.0 — a 2.0-point margin on what the money buys once accessories, adapters and sensors are added in. If that is what you are buying for, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) does not close the gap elsewhere.
Best For
Choose the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) if…
- • Multi-Room Sensing matters most to you — the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) scores 3.5/10 here (remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature).
- • Smart Home Integration matters most to you — the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) scores 6.5/10 here (matter, Apple Home, Alexa and Google support — and how much each one actually exposes).
- • Display & On-Device Control matters most to you — the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) scores 7.5/10 here (screen quality and how much you can do at the wall instead of in the phone app).
- • Your main use case is line-voltage or multi-room.
Choose the Sensi Lite (ST25) if…
- • HVAC Coverage matters most to you — the Sensi Lite (ST25) scores 6.5/10 here (stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals).
- • Installation matters most to you — the Sensi Lite (ST25) scores 8.5/10 here (wiring complexity, guided setup, and how likely a DIY install is to end in a service call).
- • You want to spend less — it's $80 cheaper.
- • Your main use case is budget or no-c-wire.
Pros & Cons
Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS)
Pros
- +One of the very few smart thermostats that actually controls 120/240V electric baseboard heat, which no Nest, ecobee, Sensi or Honeywell model here can touch
- +Real energy monitoring in watts per heater, so you can see which room is eating the bill
- +Apple HomeKit, Alexa and Google support with no hub, on a 5-year warranty
- +One thermostat per heater means genuine per-room zoning without buying a sensor ecosystem
Cons
- −16A / 3,800W ceiling at 240V, and it needs both L1 and L2 in the box — a two-wire switch loop or an oversized heater bank is a hard no
- −Heating only, on/off. No cooling, no staging, no humidifier, no ventilator
- −No Matter. Mysa's Matter rollout is documented for the central-HVAC thermostat, not the baseboard line
- −Warranty sources conflict: Mysa's own page claims 5 years while SupplyHouse's listing for MYSA-V2-0 says 2
- −You need one per heater circuit, so a four-room apartment is four thermostats and four installs
Sensi Lite (ST25)
Pros
- +One of only three thermostats here that runs without a C wire on ordinary conventional systems, and by far the cheapest
- +Ten terminals including AUX and L, with dual-fuel and zone-valve support that no other sub-$100 model here documents
- +Copeland spells out the C-wire exception in the product title itself instead of burying it in a compatibility checker
- +$79 street against $89.99 list, with heavy utility-marketplace rebate availability
Cons
- −The C-wire exemption evaporates exactly where it matters: heat-only, cool-only and heat pump systems all need one
- −No Apple Home and no Matter, so it is Alexa, Google or the Sensi app and nothing else
- −No room sensor support at all — Copeland reserves Sensi Room Sensors for the Touch 2
- −No humidifier or ventilator terminals despite the generous terminal count
- −No trim plate and no battery backup — the manual states there is no battery option, so a blown 24V fuse leaves the screen dark
Shop by Need
FAQs
Is the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) or Sensi Lite (ST25) better overall?+
Based on our 8-category scoring, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for HVAC Coverage, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) or the Sensi Lite (ST25)?+
The Sensi Lite (ST25) scores higher on HVAC Coverage (6.5/10 vs 3.0/10) — stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals.
Which is better for Installation, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) or the Sensi Lite (ST25)?+
The Sensi Lite (ST25) scores higher on Installation (8.5/10 vs 5.5/10) — wiring complexity, guided setup, and how likely a DIY install is to end in a service call.
Which is better for Multi-Room Sensing, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) or the Sensi Lite (ST25)?+
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) scores higher on Multi-Room Sensing (3.5/10 vs 1.0/10) — remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature.
Which is better for Smart Home Integration, the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) or the Sensi Lite (ST25)?+
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) scores higher on Smart Home Integration (6.5/10 vs 4.0/10) — matter, Apple Home, Alexa and Google support — and how much each one actually exposes.
Is the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) worth the price difference over the Sensi Lite (ST25)?+
The Sensi Lite (ST25) is the cheaper option at $79 versus $159. Whether the pricier model is "worth it" depends on how much you value its lead in HVAC Coverage.
Which is better suited to my use case?+
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) is the better fit if you mainly care about line-voltage or multi-room. The Sensi Lite (ST25) is the better fit for budget or no-c-wire.
What's the warranty on the Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) vs the Sensi Lite (ST25)?+
The Mysa Smart Thermostat for Electric Baseboard Heaters V2 (MYSA-V2-0 / BB2001NAUS) ships with a 60-month warranty; the Sensi Lite (ST25) ships with a 36-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.