question

pedaaa avatar image
pedaaa asked

is there any experiance using 48V diesel or gasoline generators/chargers for ESS ?

Hello,

i am using 3x Multiplus II 5000 for my ESS.

And i think about adding a fossil fuel based generator as a backup-system.

As my multis have no 2nd AC-input, and i don´t want to change to quattros, i think about installing a 48V DC-Generator, that only charges my batteries.

This should be a simple integration, isn´t it?

This could be configured by "has DC-load", and it should show as negative DC-load in VRM, correct?


I found that there are already a limited number of such 48V DC generators/chargers available on the market, see e.g:

https://koenner-soehnen.com/generator-ks-48v-dc

or some cheap chinese untis, which seem to be somehow common for Telecom applications:

https://www.alibaba.com/product-detail/5KW-Diesel-DC-Generator-Telecom-generator_1600136327490.html?spm=a2700.galleryofferlist.normal_offer.d_title.31f712adBKAlMr


So my question is:

Has anybody any experiance with this approach?

Are there any 48V DC generators that have been tested or can be recommended for this approach?


thanks to everybody!

ESSGenerator
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2 Answers
cargol66 avatar image
cargol66 answered ·

Hi,

You mean 3 Mplus II because you're working with tri-phases system ?

If not, i've seen many diagram with Multiplus II and power gen as backup.

may be this will help you:

https://www.victronenergy.com/upload/documents/Energy_Storage_System/ESS_design_and_installation_manual-en.pdf

Regards.

Bruno.


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Phil Gavin avatar image
Phil Gavin answered ·

A generator with a DC voltage above the battery voltage through an MPPT.

Here is an interesting clip that has relevance:

https://www.youtube.com/watch?v=VyJYdHzwsy4


Not a recommendation, but it would seem they are available:

https://www.aliexpress.com/item/1005004166213240.html?spm=a2g0o.productlist.0.0.389d1412FuCUQC&algo_pvid=1714d52d-f838-4bdb-bbcf-2e6d84460fce&algo_exp_id=1714d52d-f838-4bdb-bbcf-2e6d84460fce-19&pdp_ext_f=%7B%22sku_id%22%3A%2212000028251441925%22%7D&pdp_npi=2%40dis%21EUR%21461.57%21369.26%21%21%21%21%21%402101d64d16698113621061085ea156%2112000028251441925%21sea&curPageLogUid=mEU8JAEag1s8


Edit: I see 96Vdc generators are available ( even for propane).

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