EG4
Retailer listing · 1 offer collected
▶ Watch 3 creator videosListed equipment price
In stock when checkedView retailer offer Price observation: 2026-11-04 · USDLOOK CLOSER
6 reviewed views for EG4 FlexBOSS21: source photos and original reference diagrams.
Explicit marketed-model references only. Photo sample, source-document revision and delivered hardware may differ; bundles and similarly named models are not automatically included.
View captions, source documents & creditsSHOP THE SAME EQUIPMENT
One exact price collected
1 retailer · 1 offer collected. Prices exclude shipping, tax, and installation. Compare the stock, condition, and date for each offer.
| Retailer | Listed price & quantity | Availability & condition | Observed | Shop |
|---|---|---|---|---|
| SanTan SolarStore policies & support | $3,599.99Single item | In stock when checkedCondition not recorded | Source date 2026-11-04 | View offer |
WHAT WE ACTUALLY OBSERVED
Observations keep their original source dates and purchase scopes. Historical lows are separate from current availability. Unpriced and configuration-dependent offers are never treated as exact-price lows.
Open to load this exact offer’s dated source observations.
No exact-model certification record has been reviewed for this listing in our evidence collection. This does not establish whether the product is certified.
How to verify the model and scopeTHE DETAILS THAT MATTER
| Specification | Listed value | Source |
|---|---|---|
| Inverter type | Hybrid | Manufacturer documentationReviewed 2026-11-04 |
| AC phase | Split phase | Manufacturer documentationReviewed 2026-11-04 |
| Battery voltage (V) | 48 | Retailer listing title |
| Maximum solar input (W) | 21000 | Retailer listing title |
| AC output voltage | 120 / 240 V | Manufacturer documentationReviewed 2026-11-04 |
| MPPT trackers | 3 | Manufacturer documentationReviewed 2026-11-04 |
| Weight (kg) | 39.92 | Retailer specifications |
SEE IT IN USE
3 videos from 3 channels. Reviews belong to their creators. Prices and product revisions may have changed since filming. Press play to load YouTube.
System demonstration
System demonstration of the FlexBOSS21 with a separate GridBOSS. This listing is the inverter only; GridBOSS is not included.
Creator discloses paid promotion or sponsorship and affiliate links.
Watch on YouTube
First look
First look at the FlexBOSS21 inverter. This is not a long-term reliability review. GridBOSS, batteries and the optional display are separate components.
Creator discloses an affiliate relationship with reviewed products.
Watch on YouTube
Installer system demonstration
Installer-led walkthrough/interview of a FlexBOSS21 hybrid system with EG4 wall-mount batteries. Inverter listing only; complete system and battery contents differ.
See the original video for the creator’s sponsorship and affiliate disclosures.
Watch on YouTubeKEEP EXPLORING
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