4G Solar System Remote Monitoring Sourcing

Title: Pay-Per-Find - Source 4G Remote Monitoring Device for Off-Grid Solar Systems
Project Overview:
I am looking for a freelancer to source and verify existing remote monitoring devices that can integrate with off-grid solar home systems for remote troubleshooting. The device should be an MPPT charge controller or an add-on that meets the following criteria:

Device Requirements:
Connectivity & Data Handling:

4G SIM-enabled for remote monitoring.
Offline data storage (uploads data once connectivity is restored).
Monitoring Features:

Tracks PV wattage production (Voltage, Current, Power).
Monitors load consumption in real-time.
Provides battery state of charge (SOC) and battery health insights.
Integration & Cost:

Compatible with existing MPPT charge controllers (20A - 100A).
Maximum price per unit: $30 or less (bulk pricing preferred).
Can work with existing solar home systems.
Freelancer Payment Model:
$10 per verified product (up to 3 products).
Total maximum payout: $30.
Verification Requirements (Must Include for Payment):
Product name & model number.
Supplier details (website link, manufacturer, or verified seller).
Pricing & bulk order details ($30 or less per unit).
Technical datasheet or spec sheet (PDF or manufacturer website).
Confirmation of key features matching requirements.
Ideal Freelancer:
Experience in product sourcing (IoT, solar, or electronics).
Ability to quickly research and validate suppliers.
Prior experience sourcing from Alibaba, AliExpress, Banggood, or direct manufacturers is a plus.
Deadline & Process:
Expected completion: Within 7 days.
Freelancer submits each verified find separately, and payment is released per find.
If multiple freelancers submit the same product, first verified submission gets paid.