Thermino® ePlus/xPlus with Solar PV (Mia Energy Series Kit) – Wiring & Settings
(D0085-MA)
NOTICE
Please read & comply with all these instructions before commencing installation. Failure to install and operate this system in accordance with these instructions will invalidate the manufacturer’s warranty.
Please leave these instructions with the customer for future reference.
Always use these instructions in conjunction with the Installation and User Instructions Manual of the purchased Sunamp heat battery.
1. Introduction
1.1 General
The following instructions provide guidance for the installer and end-user of Thermino® ePlus and xPlus Heat Batteries when used with compatible solar/PV power diverters.
These instructions must be read in conjunction with the Installation and User Instructions Manual for the Thermino ePlus (document D0083) and xPlus (document D0084) products.
1.2 Symbols Used
In these instructions the following symbols are being used to draw the user’s attention to information of particular importance.
WARNING
Indicates a hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION
Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury or material damage.
NOTICE
Signals information that is considered important but not hazard related.
1.3 Abbreviations
The following abbreviations are used throughout these instructions:
PV - Photovoltaics
PDC – Power Diversion Controller
NTC - Negative Temperature Coefficient
2. Safety
2.1 General Safety Notices
WARNING
Only competent persons suitably qualified to carry out plumbing and electrical work may undertake installations, repairs or relocations of the appliance.
Product training on the full range of Thermino heat batteries is available from Sunamp or authorised training partners.
WARNING
Risk of electric shock – potential dual supply. Always isolate the power supplies to the heat battery controller before working on the heat battery.
CAUTION
These instructions must be read in conjunction with the Installation and User Instructions for the respective Thermino product.
CAUTION
Do not operate the immersion heater until the correct commissioning procedure has been identified and the unit has been appropriately commissioned (see document D0114).
MA - Mia Energy Series Kit power diversion controller
WARNING
All Electrical wiring must be carried out by a competent person and be in accordance with the latest local wiring codes and regulations.
Risk of electric shock – potential dual-supply. Always isolate the power supply/ies to the Heat Battery, Heat Pump & Solar Diverter controller (if used) before working on the appliances.
These settings are applicable to the following products:
Thermino ePlus with PV02 Optimino key (document D0083 – Section 6.4.2 for wiring instructions & Figure 1 below)
Thermino xPlus with any “02” Optimino key (document D0084 – Section 6.4.2 for wiring instructions & Figure 1 below)
Solar Power Diversion Controllers from the Mia Energy Series Kit range
MA.1 - Wiring setup: Mia Energy Series Kit & Thermino ePlus/xPlus
Figure MA.1 - Mia Energy Series Kit wiring instructions
MA.2 - Settings to be applied to Mia Energy Series Kit PDC
NOTICE
For configuration of applicable settings on the MIA Energy power diversion controller, please refer to the manufacturer’s user and installation instructions.
NOTICE
Please refer to the solar power diversion controller manufacturer's installation and user manual for detailed wiring and settings instructions.
Document Part Number: D0085-MA
Version Number: 1.0
Publication Date: 30.01.2026
Sunamp Ltd
1 Satellite Park
Macmerry
East Lothian
EH33 1RY
Scotland
Customer Service (Phone): +44 (0)1875 610 001
Customer Service (Email): customerservice@sunamp.com
www.sunamp.com