FAQ

Below is a list of frequently asked questions about Samduo PV inverters and lithium batteries. Is there anything else you would like to know about Samduo and Samduo’s products? You can keep in touch with us via customer service phone, email, or online chat.

FAQ

Samduo FAQs

Authentication support
UN38.3, MSDS, Marine reports and CE certification can be provided.
Quality Inspection report
We provide functional test reports and temperature rise test reports, and can offer detailed test data.

Support
Provide product specification sheets, technical parameter tables, and temperature rise test reports.

Overseas logistics
Supports certification customization (such as CE), complies with overseas regulations, the default packaging includes multi-language instructions, and supports overseas shipping.

Yes.
It is estimated that samples can be provided. The cost will be based on the retail price or negotiated.

Main products:
Portable power supply series:
Yx-bxs 250W (1kWh/250W)
Yx-bxs 500W (2kWh/500W)
Yx-bxs 1000W (2kWh/1000W)

Home energy storage system:
Wall-mounted type (5kWh/10kWh)
Stacked type (5kWh-20kWh, supports expansion up to 80kwh)

Photovoltaic inverter:
3kW/5kW/10kW (Compatible with off-grid and grid-connected systems)

Low-power scenarios (mobile phones, lamps, fans, etc.) : 250W model (1kWh battery life approximately 10 hours)
Medium power demand (car refrigerator/projector, etc.) : 500W model (2kWh battery life approximately 5 hours)
High-power short-term use (chainsaws, cutters, emergency power supply, etc.) : 1000W model (2kWh battery life approximately 2 hours)

Mains charging: 150-264Vac wide voltage input
Solar charging: Supports 200-600V photovoltaic input
Hybrid charging: Automatic switching between mains power and photovoltaic power (with priority given to solar energy)

Safety Assurance
Pure sine wave output (THD<3%, suitable for precision electrical appliances)
Overcurrent protection (cut off within 3±0.5 seconds)

Camping power supply (lighting/refrigerator/coffee machine), outdoor shooting (camera/drone), emergency disaster relief (medical equipment/communication), mobile office (notebook/projector), etc.

Transportation requirements:
UN38.3 Certification (Air/Sea Freight Compliance)
Temperature limit: -20℃ to 60℃ (Avoid extreme environments)
Installation requirements
Home energy storage requires wall fixation (load-bearing capacity ≥50kg)
Portable power supply plug and play (no installation required)

Operating temperature:
Discharge: -10℃ to 40℃
Charging: 0℃ to 40℃

Support mode:
Main power bypass (direct power supply from AC input, charging simultaneously)
Photovoltaic priority (output during solar charging)

The home energy storage system supports firmware OTA upgrades (via USB or Bluetooth modules).

The home energy storage system supports complete off-grid operation

Service FAQs

Samduo is a old brand for power and solar products since 1993. Samduo 100% is factory, Samduo have several brother factories for different products:Guangdong Samduo for inverter and solar productsHangzhou Samduo for frequency invertersZhejiang Samduo for stabilizerThis website is for Guangdong Samduo, with main products covers: off grid/hybrid solar inverter, PV module, Lithium battery and storage system. We can offer one stop shopping for solar system and related products.

For off grid solar inverters, the industry standard warranty period is 1 years. Samduo can also offer extended warranty service up to 2-3 years with extra charge once requested by some special projects.

1). What can you get to be Samduo agent:More technical training, support and more free spare partsSpecial price support for Samduo agentAdvertising & publicity expenses share for Samduo brandAnnual bonus, 0.5%-2% based on their annual sales amountFast good delivery as we have regular Samduo brand products in stockCan share Samduo brand influence2). The condition to be Samduo agent:Take care of Samduo brandHave engineer team who can communicate with our engineer easilyHave their own channels to develop & win the market.Have shops or show room to display Samduo brand and productsReports on market conditionsCan fulfil Samduo appointed annual targets (For exclusive agents).You are most welcome to be Samduo agent! For more details, please feel free to contact with us right now!

If you meet any&nbsp;problems&nbsp;with&nbsp;Samduo product(s), please refer to&nbsp;the&nbsp;user manual to check and&nbsp;confirm first if your operation and setting&nbsp;according to instructions. If still can not solve&nbsp;your problem, please offer&nbsp;additional information below and send an email to Samduo&nbsp;Support Team&nbsp;. Please remember it is very important you supply as much relevant information as possible, including:A clear photo of the S/N label (model name + serial number)Clear description of the problemRelevant details and frequency of the problem (if applicable)Current condition of the product: can it DC start with battery? Any error code on screen?Background information (Inverter): AC source (utility or generator)? battery capacity? approx load level and type? any solar input?Background information (Solar Charger): solar panel electrical specification? PV configuration? system voltage?Supplemental photos/screenshot or videos relevant to the issueWhere the product was purchasedOnce sufficient data is gathered your case will be forwarded to our technical team for consult, and a solution will be provided to you as soon as possible. Please note our regular office hours are Mon-Fri only and general response time is within 48-72 business hours, though for more complex issues we may need more time for research and lab consult.

All Samduo original products have passed strict inspection, and are free from defects in material or workmanship for the warranty period stated in the contract. Unless otherwise specified, the standard international warranty of Samduo products are as follows:Home Inverter & Off grid/Hybrid Solar Inverter, 1 yearLithium Battery, 2/3/5 years as per proforma invoice or contract specifiedSolar Panel, 5-25 years (under STC list) as per proforma invoice or contract specifiedNormally, we will offer following easily damaged components to cover the service together with the order shipment:For Inverter, 1% PCBA board and easily damaged components like MOSFET, fuse.For Lithium battery, 1% BMS board/lithium battery/cell equalizer based on order qty.Claim procedure:Before requesting warranty service, check the operation manual to be certain that there is a problem with the product. To obtain rapid service under this warranty, please report defective devices with detail reports with information mentioned in “How to Get After-Sales Tech Support”, which is critical to a rapid disposition of your warranty claim, and we will reply within 48-72 business hours after we gathered all you information.Samduo reserves the right to provide either free repair or replacement for products covered by warranty, depending on product type. In most cases, when customer is able to provide sufficient and clear data, upon successful review and confirmation of warranty coverage, free replacement boards or parts will be supplied to customer without requiring any return. In exchange, customer will agree to a small charge to cover postage of the replacement board or parts.Please note damage due to following causes is excluded from warranty:Improper transportation and deliveryUnauthorized modifications, alterations or any form of self-repair attemptsImproper installation, usage or operation (all products are indoor rating, unless otherwise stated), including damages arising from use in environment with excessive moisture corrosion or dust build-upNon-compliance with relevant safety standards or regulationsApplication beyond the scope of product design/ratings or safety standardsActs of uncontrollable natural forces such as lighting, flood, fire, storm etcInsufficient ventilation of the device

All Samduo products passed strict testing and free from defective before shipment, including:
IQC inspection, IPQC inspection, QA inspection.
Make sure all products 100% inspected in each procedure.
That is why Samduo can last for so many years and gain good reputation in the market.

Inverter FAQs

First, you should know what they are used for. If they are just use them for some basic home appliances like light, TV, fans, you can choose modified sine solar inverter. If they will be used to power some inductive load with motor, you have to choose pure sine wave solar inverter.
Second,you need know what is the total power of your loads. The rate inverter output power shoud be bigger than the load power to make sure they can works properly
Third, Your budget for this solar inverter system, There are some extra function of solar inverter for selection, such as mppt or pwm type solar charger built inside? Need parallel function or not? How many pieces solar panels you are intend to connect? Need remote WiFi or not?
For more details, can contact with our customer service.

For off grid solar inverters, the industry standard warranty period is 1 years. Samduo can also offer extended warranty service up to 2-3 years with extra charge once requested by some special projects.

Yes, Samduo SUNPOLO 5KW/6KW/8KW are real hybrid can feed to grid via setting.

Yes, parts of Samduo solar inverter optional for parallel operation up to 6-9pcs, including:
SUNSEE 5KVA, SUNPAX 5.5KW, SUNPOLO 5KW/6KW/8KW, SUNSEE AMERY 3KVA/5KVA

All Samduo pure sine wave soar inverter can work with lithium battery, and parts of Samduo solar inverter like SUNON IV series and SUNPOLO 6KW with BMS built inside, which can communicate with main brand of lithium battery such Samduo/PYLONTECH/WECO.
If the solar inverter doesn’t have BMS built inside, or the lithium battery doesn’t support the inverter communication protocol, Samduo solar inverter work can also work with lithium battery by hand setting to the battery protection voltage of Samduo solar inverters as follows:
If your battery voltage is 12V, Please set:
CV=14.4V
FLV=14.0V
COV=12.0V

If your battery voltage is 24V, Please set:
CV=28.8V
FLV=28.0V
COV=24.0V

If your battery voltage is 48V, Please set:
CV=57.6V
FLV=56.0V
COV=48.0V

Yes, most Samduo solar inverter with high voltage MPPT solar charger inside support battery-less work like: SUNON IV/SUNON PRO/SUNON PLUS/SUNPAX/SUNPOLO series.

If you order Samduo brand products, no special requirements to MOQ, but of course the more quantity you order, the better price you will get.
If you want to do your own brand and package design, normally the MOQ is 200-500pcs depends on model no.

Please contact with us by what’sapp 0086-13600163505 for urgent issue if I am not avialable now

It depends on which model of Samduo solar inverter you have, and what kind of solar panel do you use.

If your Samduo solar inverter with PWM solar charger inside (like SVP series):
For 12Vdc solar inverter, the mini solar panel is 1pc with VMP as 18vdc
For 24Vdc solar inverter, the mini solar panel is 2pc in series connection with each one VMP as 18vdc, or mini 1pc solar panel with vmp as 36Vdc.

if your Samduo solar inverter with low voltage (max PV input as 115vdc/145vdc) MPPT solar charger inside (like ISUN/SUNSEE series):
For 12Vdc solar inverter, the mini solar panel is 1pc with VMP as 18vdc
For 24Vdc solar inverter, the mini solar panel is 2pc in series connection with each one VMP as 18vdc, or mini 1pc solar panel with VMP as 36Vdc.
For 48Vdc solar inverter, the mini solar panel is 4pc in series connection with each one VMP as 18vdc, or mini 2pc solar panel in series connection with each VMP as 36Vdc.

if your Samduo solar inverter with high voltage (max PV input as 450vdv/500vdc) MPPT solar charger inside (like SUNON IV/SUNON PRO/SUNON PLUS/SUNPOLO series):
For 24Vdc solar inverter, the mini solar panel is 8pc in series connection with each one VMP as 30vdc, or mini solar panel is 7pc in series connection with each one VMP as 36vdc/41v.
For 48Vdc solar inverter, the mini solar panel is 8pc in series connection with each one VMP as 30vdc, or mini solar panel is 7pc in series connection with each one VMP as 36vdc/41v.

Battery FAQs

Samduo lithium battery Pack adopts top brand LiFePO4 Pack such as: BYD, CATL, BAK
Smart BMS built inside,max discharge current up to 200A
Compatible with Solar inverter perfectly
Long cycle life design, optional up to 6000 cycles, 10-15 years life design
Certificates: UN38.3, MSDS, CE,CB,IEC report

1). Size and weight:
Lithium battery with higher density, so it has smaller size and lighter weight than lead acid battery, can save shipment space and easy to operate
2). BMS and protection:
Lithium battery built inside with smart BMS provided all around protection functions, so it can protect itself properly. While lead acid battery no such function and need the protection from other extra device.
3). Life design:
Lithium battery cells cycles up to 6000 cycles, with 5 years warranty and 10 years life design. While Lead acid battery only 300-600 cycles, normally only 1-2 years warranty
4). DOD is different:
The DOD of Lithium ion battery packs can be 100%, while the recommended Lead acid battery DOD is around 50%-60%, which means the user have to keep 40%-50% inside to ensure the lead acid battery life.
5). Safety and reliability:
Lithium ion battery packs are free from harmful materials such as nickel, cobalt, or lead. The lithium battery pack is anti-explosion, so they are safe and reliable. While lead acid with lead built inside and have the possibility of explosion

Yes, Samduo lithium battery pack can compatible with most main brand of inverter on the market such as Deye, Growatt, Voltronic, GOODWE, SMA, etc. For more details, contact with Samduo customer service.

The user can select the battery type on the inverter as “USER DEFINE”, and set the battery protection voltage on the inverter as follows:
If your battery voltage is 12V, Please set:
CV=14.4V
FLV=14.0V
COV=12.0V
If your battery voltage is 24V, Please set:
CV=28.8V
FLV=28.0V
COV=24.0V
If your battery voltage is 48V, Please set:
CV=57.6V
FLV=56.0V
COV=48.0V

All Samduo lithium battery support parallel connection.
For parallel connection, Samduo 12V lithium battery support max 4pcs in series with max votlage as 48Vdc. If still any question, can contact Samduo customer service

No. When a battery is dismantled or taken apart, contact with components can be harmful and may cause personal injury and/or fire.

BMS stands for Battery Management System. It works to protect the cells from getting damaged against over or under-voltage, over-current, high temperature, or external short circuit. In addition, the BMS will shut off the battery to protect the cells from unsafe operating conditions. All Samduo batteries have a built-in BMS, that are not visible for customers most of the time to manage and safeguard battery against these types of issues.

BMS stands for Battery Management System. It works to protect the cells from getting damaged against over or under-voltage, over-current, high temperature, or external short circuit. In addition, the BMS will shut off the battery to protect the cells from unsafe operating conditions. All Samduo batteries have a built-in BMS, that are not visible for customers most of the time to manage and safeguard battery against these types of issues.

BMS stands for Battery Management System. It works to protect the cells from getting damaged against over or under-voltage, over-current, high temperature, or external short circuit. In addition, the BMS will shut off the battery to protect the cells from unsafe operating conditions. All Samduo batteries have a built-in BMS, that are not visible for customers most of the time to manage and safeguard battery against these types of issues.

No. Any combination of alkaline batteries, zinc carbon batteries, or rechargeable batteries in one device could cause damage to the device and/or leakage to the batteries.

Yes. Samduo batteries are rechargeable.

Samduo batteries are currently available to purchase on Alibaba in the US, UK, Germany, Canada, Mexico and Italy. You can visit our Alibaba stores at Samduopower.en.alibaba.com, or contact Samduo customer service from www.samduo.com

Always a pre-production sample before mass production;
Always aging with Samduo solar inverter before packing;
Always final Inspection before shipment;
Radon check by QA

Solar Panel FAQs

For grade A quality panel, Samduo panel warranty period under STC is as follows :
25 Years output guarantee
12 Years quality assurance
5-year limited warranty of materials and workmanship.

No, Samduo solar panel is not on the tier 1 manufacturer list. Module manufacturers not present on a Tier-1 report doesn’t mean their quality inferior. Some of the most innovative or respected module manufacturers globally are not on tier 1 reports also such as Panasonic and Tesla solar panel.

Samduo’s intelligent production network can guarantee the traceability of each module, and our highly automated production lines feature end-to-end inspection and analysis processes to ensure that each module meets the highest quality standards. We select module materials according to the highest standards, with the requirement that all new materials be subject to extended qualification and reliability tests before being incorporated into our products.

Samduo Solar panels adopts top brand solar cells such as Longji, jinko, etc.

Samduo solar panel already obtains TUV/CE/CB, and can help customer apply CQC, Saber or SONCAP certificates.

Poly-crystalline silicon is old technology. The power efficiency is lower compare with mono -crystalline silicon . Normally poly panel can reach 18.8% power efficiency. Half cut mono panel can reach 22%~23%, so now more and more people focus on 500W-600W solar panel, higher efficiency, less space, and easier maintenance.

410W-550W solar panel are most popular, which are adopted latest technology half cut cell and mono perc technology. The max efficiency of 450W/550W is up to 22%, traditional panel 250W ~380W solar panel is 18-20 %. Thanks to the latest half-cut technology, the solar cell internal resistance is reduced, which provides an additional module power even in overcast light conditions, in cloudy weather, and in low light conditions.

The MOQ for Samduo solar panel is 1*40FT container. Normally 1*40HQ can load 660pcs*450W, 620pcs*550W 550W.

Any question?

If we still haven't answered your question, you can contact us below and we will get back to you as soon as possible.

Customer support

0086-15818564685

+86 13581396884

Send a message

carriehu@samduo.com
janezou@samduo.com