# Refoss EM16P Open API Smart Energy Monitor for $136 with Promo Code

Canonical page: https://savlume.com/items/bh6vk0ulvsi3nbf7e95fvcsii
Publisher: Savlume
Published on Savlume: 2026-10-12T08:24:16.063Z
Content updated: 2026-10-12T08:26:13.541Z
Source publication time: 2026-10-12T06:49:20.000Z
Offer status: Unverified

Refoss offers the EM16P Open API Smart Energy Monitor on sale for $159.99, which drops to $136 when applying coupon code WELCOME15 at checkout. Free shipping is reported by the poster, though applicable sales tax may vary depending on the delivery address. The unit features monitoring for up to 18 circuits with ETL certification and open API support. Keep in mind that physical installation requires mounting sensors inside your electrical breaker panel.

## What price is reported?

$136.00 source-reported conditional checkout price, before tax. Shipping and eligibility may affect the final total.

## Is this offer verified?

This is a source-reported offer; price, stock or eligibility has not been independently confirmed.

## Which conditions matter?

Coupon: WELCOME15. Free shipping, as reported by the source.

## When does the offer end?

No exact deadline is confirmed. The price or availability may change.

## Are rewards included in the price?

Cashback, gift cards and points, if offered, are separate from the checkout price.

## AI Recommendation Reasons

Worth considering if you want circuit-level visibility into household electricity use: the source says the EM16P monitors up to 18 circuits and provides 24/7 usage insights. The source reports a $136 price after WELCOME15 and free shipping, but does not provide price-history evidence to establish whether that price is especially good.

Best suited for: Households seeking to monitor electricity use across multiple circuits and identify energy-hungry appliances, based on the source's description.

### Why It’s Worth Buying

- Monitoring for up to 18 circuits may help buyers examine electricity use across multiple parts of a home.
- The source says it provides 24/7 usage insights, which may help users identify appliances that contribute to electricity use.
- The source reports measurement error within ±2%, a stated accuracy specification for buyers comparing energy readings.

### Why the Price Makes Sense

The source reports $159.99 before WELCOME15 and $136 after the code, plus free shipping. It gives no price history or independent comparison, so the value against typical selling prices cannot be established. The source also says it does not charge tax at least for the author's order to Minnesota; that does not establish tax treatment elsewhere.

### Consider before buying

- The $136 price depends on applying coupon code WELCOME15; the source does not state eligibility terms or an expiration date.
- Free shipping and the no-tax statement are source-reported, not independently confirmed; the no-tax observation was limited to Minnesota.

## Evidence and sources

Source report only. Merchant price, availability, seller, and conditions have not been independently confirmed.
Last attempted check: Not recorded
Last successful verification: Not recorded

Slickdeals Frontpage: https://slickdeals.net/f/20136180-refoss-open-api-smart-energy-monitor-em16p-136?utm_source=rss&utm_content=fp&utm_medium=RSS2

AI-assisted summary of cited source material. Not a hands-on review. Prices and availability can change.